Kev xaiv cov khoom siv CVD txheej zoo tshaj plaws yog qhov tseem ceeb rau kev txhim kho kev ua haujlwm ntawm cov khoom thiab lub neej ntev. Cov ntawv tshaj tawm no piv ncaj qha rau Titanium Nitride (TiN), Aluminium Oxide (Al2O3), thiab Silicon Carbide (SiC) CVD txheej los coj kev xaiv cov khoom siv rau cov ntawv thov kev lag luam tshwj xeeb. Kev nkag siab txog cov qauv kev ua tau zoo sib txawv ntawm txhua yam khoom siv yog qhov tseem ceeb rau kev txiav txim siab zoo. Kev lag luam thoob ntiaj teb rau CVD txheej tau mus txogUSD 20.38 billion hauv xyoo 2023, nrog rau kev kwv yees qhia txog kev loj hlob mus rau USD 44.2 billion los ntawm xyoo 2032, uas qhia txog tus nqi loj hlob txhua xyoo ntawm 7.58% thaum lub sijhawm kwv yees.
Cov Ntsiab Lus Tseem Ceeb
- Cov txheej txheem CVDzoo li TiN, Al2O3, thiab SiC ua rau cov khoom muaj zog dua thiab kav ntev dua.
- Cov txheej txheej TiN zoo rau cov cuab yeej thiab cov khoom dai; lawv tawv thiab tiv taus kev hnav.
- Cov txheej txheem Al2O3 ua haujlwm tau zoo hauv cov chaw kub heev thiab tiv taus cov tshuaj lom neeg; lawv tiv thaiv cov khoom los ntawm xeb.
- Cov txheej txheej SiC zoo tshaj plaws rau qhov kub thiab tshuaj lom neeg, zoo li hauv kev ua cov khoom siv computer chip; lawv huv heev thiab muaj zog.
- Kev xaiv cov txheej txheem zoo nyob ntawm seb qhov khoom yuav tsum ua dab tsi thiab qhov twg nws yuav raug siv.
Nkag Siab Txog Kev Siv Tshuab Txheej Txheem CVD
Kev Tso Pa Tshuaj lom neeg (CVD) yog dab tsi?
Kev Tso Pa Tshuaj Lom Zem (CVD) yog ib qho txheej txheem nyuaj uas tso cov zaj duab xis nyias nyias ntawm cov khoom khov rau ntawm lub substrate los ntawm cov theem roj. Cov txheej txheem no suav nrog ntau yam kev tshuaj lom neeg tshwm sim ntawm lossis ze ntawm qhov chaw ntawm lub substrate. Cov tshuaj lom neeg tseem ceeb hauv CVD suav nrogkev rhuav tshem thermal, kev txo qis, kev oxidation, thiab kev tsim cov tshuaj sib xyaw. Cov kev tshuaj tiv thaiv no feem ntau cuam tshuam nrog cov tshuaj tiv thaiv roj-theem, qhov twg cov tsiaj nruab nrab tsim los ntawm cov tshuaj tiv thaiv ua ntej. Tom qab ntawd, cov tshuaj tiv thaiv saum npoo av cuam tshuam rau kev sib kis thiab kev tshuaj tiv thaiv ntawm cov tsiaj no ntawm qhov chaw substrate, ua rau cov zaj duab xis loj hlob. Lwm hom kev tshuaj tiv thaiv feem ntau suav nroghydrolysis, pyrolysis, thiab displacement.
Vim li cas CVD Coatings thiaj li tseem ceeb rau kev txhim kho cov khoom siv
Cov txheej txheej CVD yog qhov tseem ceeb rau kev txhim kho cov khoom siv hauv ntau yam lag luam. Lawv muaj cov txiaj ntsig zoo dua li lwm cov txheej txheem txheej. Piv txwv li, cov txheej txheej CVD tiv thaivoxidation thiab corrosion, ua kom lub neej ntawm cov khoom siv ntev dua. Cov chaw tsim khoom tuaj yeem kho cov txheej no rau cov hom phiaj kev ua tau zoo tshwj xeeb, xws li ua tiav cov tshuaj tsis muaj zog. Cov thev naus laus zis no txhim kho kev ua tau zoo thiab cov khoom ntawm cov khoom cog biomedical, txhim kho kev sib raug zoo, kev tiv thaiv kev hnav, qhov nyuaj, thiab kev ruaj khov. CVD zoo dua hauv kev sib xws, muab cov qauv zaj duab xis sib xws txawm tias nyob rau sab hauv thiab sab nraud. Qhov no tso cai rau cov khoom siv txheej sib xws ntawm txhua qhov chaw cog. Cov khoom siv roj zoo ua kom cov txheej nrog kev ntshiab zoo dua. Tsis zoo li feem ntau cov txheej txheem PVD, cov txheej txheem CVD yogtsis txwv rau daim ntawv thov kab-ntawm-pom, ua kom muaj txheej txheej ntawm txhua qhov chaw ntawm ib feem, suav nrog cov xov thiab cov qhov dig muag. Cov txheej txheej sib txuas rau qhov chaw thaum lub sijhawm ua tshuaj tiv thaiv, tsim kom muaj kev sib txuas zoo dua piv rau cov txheej txheem PVD lossis cov txheej txheem tsuag kub qis. Kev ua kom zoo dua ntawm cov roj precursor tso cai rau cov txheej txheej nrog kev tiv thaiv kev hnav zoo dua, kev nplua nuj siab, kev tiv thaiv corrosion, lossis kev ntshiab siab.
Titanium Nitride (TiN) CVD Txheej: Kev Ua Tau Zoo thiab Daim Ntawv Thov
Cov yam ntxwv tseem ceeb ntawm TiN CVD txheej
Cov txheej txheej Titanium Nitride (TiN) CVD muaj ntau yam kev ua tau zoo heev. Lawv muaj qhov nyuaj tshwj xeeb, feem ntau yog txij li 2000 txog 2500 HV, uas ua rau muaj kev tiv thaiv kev hnav zoo dua. Qhov kev nyuaj siab no ua rau cov khoom siv ruaj khov dua tiv thaiv kev sib txhuam thiab kev yaig. TiN kuj muaj kev tsis sib haum xeeb zoo, tiv taus cov tshuaj tiv thaiv nrog ntau yam tshuaj corrosive. Nws cov coefficient qis ntawm kev sib txhuam pab txo qhov kub thiab txhim kho kev ua haujlwm zoo. Ntxiv mus, TiN txheej txheej muaj xim kub zoo nkauj, ua rau lawv haum rau kev kho kom zoo nkauj. Cov txheej txheej tswj nws qhov kev ncaj ncees thiab kev ua tau zoo ntawm qhov kub siab, txawm hais tias nws qhov kev tiv thaiv oxidation tsis siab npaum li qee cov ntaub ntawv lwm yam.
Cov Kev Siv Rau TiN CVD Txheej
Cov lag luam dav dav siv TiN CVD coatings rau ntau yam kev siv tseem ceeb vim lawv cov khoom muaj zog. Cov chaw tsim khoom feem ntau siv TiN raucov cuab yeej txiav, xws li cov laum, cov tshuab txiav kawg, thiab cov hniav pom, kom ntev lawv lub neej thiab txhim kho kev ua haujlwm txiav. Cov khoom cog kho mob kuj tau txais txiaj ntsig los ntawm TiN coatings, uas txhim kho biocompatibility thiab hnav tsis kam. Cov khoom siv aerospace siv TiN rau nws qhov ruaj khov thiab tiv thaiv kev ua haujlwm hnyav. Tsis tas li ntawd, qhov tiav kub zoo nkauj ua rau TiN yog qhov kev xaiv nrov rau cov khoom dai kom zoo nkauj ntawm cov khoom xws li cov hniav nyiaj hniav kub thiab cov moos.
Cov Zoo thiab Cov Kev Txwv ntawm TiN CVD Txheej
Cov txheej txheej TiN CVD muaj cov txiaj ntsig zoo heev. Lawv ua rau lub neej ua haujlwm ntawm cov cuab yeej thiab cov khoom siv ntev dua, txo cov nqi hloov pauv thiab lub sijhawm tsis ua haujlwm. Cov txheej txheej muab kev tiv thaiv kev hnav thiab kev sib txhuam zoo heev, tseem ceeb rau cov khoom uas raug kev sib txhuam tas li. Lawv qhov kev sib txuas zoo rau ntau yam substrates ua kom muaj kev sib txuas ruaj khov thiab ntev. Txawm li cas los xij, TiN coatings muaj cov kev txwv. Lawv qhia txog kev ruaj khov thermal nruab nrab piv rau qee cov ceramics siab heev, nrog rau oxidation tshwm sim ntawm qhov kub siab tshaj 500 ° C hauv huab cua. Thaum tawv, lawv tuaj yeem brittle, uas yuav ua rau chipping nyob rau hauv cov khoom hnyav. Cov txheej txheem deposition feem ntau xav tau qhov kub siab, uas tuaj yeem txwv nws daim ntawv thov rau qee cov ntaub ntawv substrate.
Aluminium Oxide (Al2O3) CVD Txheej: Kev Ua Tau Zoo thiab Daim Ntawv Thov
Cov yam ntxwv tseem ceeb ntawm Al2O3 CVD txheej
Cov txheej txheem Aluminium Oxide (Al2O3) CVD yog nto moo rau lawv cov khoom zoo heev, ua rau lawv muaj txiaj ntsig zoo hauv ntau qhov chaw lag luam. Lawv qhia tau tias muaj qhov nyuaj thiab ruaj khov zoo heev.
| Qhov project | Chav tsev | Tus nqi lej |
|---|---|---|
| Vickers Hardness | HV 0.5 | 1,800 |
| Cov Coefficient ntawm Kev Nthuav Dav Kub | 1n-5k-1 | 8.2 |
Cov txheej no kuj muaj cov tshuaj lom neeg tsis muaj zog, tiv taus kev tawm tsam los ntawm ntau cov tshuaj lom neeg. Lawv cov hluav taws xob tiv taus siab ua rau lawv zoo heev hluav taws xob insulators. Ntxiv mus, Al2O3 txheej muab kev tiv thaiv oxidation zoo kawg nkaus, tshwj xeeb tshaj yog thaum kub siab, tiv thaiv cov ntaub ntawv hauv qab los ntawm kev puas tsuaj.
Cov Kev Siv Ib Txwm Muaj ntawm Al2O3 CVD Txheej
Al2O3 coatings pom dav siv nyob rau hauv cov chaw nyuaj uas hnav thiab xeb yog qhov txhawj xeeb tseem ceeb. Lawv ua haujlwm uacov kev daws teeb meem uas tau tsim tsarau kev tiv thaiv hauv ntau yam kev siv. Cov chaw tsim khoom siv Al2O3 txheej rau tungsten substrates los txhim kho kev tiv thaiv oxidation ntawm qhov kub siab tshaj 800 ° C, tshwj xeeb tshaj yog tshaj 1000 ° C, qhov twg tungsten feem ntau tsim thiab sublimes WO3. Cov txheej txheem no kuj tseem txo qhov oxidation tus nqi ntawm γ-TiAl alloys ntawm 900–1000 ° C.Al2O3 yog ib qho txheej txheem txheej txheem rau cov cuab yeej cemented carbide, uas ua haujlwm nyob rau hauv cov xwm txheej uas xav tau kev ua kom zoo, kev tiv thaiv kev hnav, kev sib txuas zoo, thiab kev ruaj khov thermal. Tsis tas li ntawd, cov kws tshawb fawb xav txog Al2O3 coatings rautiv thaiv cov roj cladding hauv cov reactors ceev ceev uas txias los ntawm cov hlau lead (LFRs)vim lawv qhov kev tiv thaiv corrosion zoo dua hauv cov chaw ib puag ncig nuclear.
Cov Zoo thiab Kev Txwv ntawm Al2O3 CVD Txheej
Cov txheej Al2O3 muaj cov txiaj ntsig zoo heev, suav nrog kev tawv zoo heev, kev ruaj khov kub siab, thiab kev tiv taus tshuaj lom neeg thiab oxidation zoo heev. Cov khoom no ua rau lub neej ntawm cov khoom ntev dua hauv cov xwm txheej hnyav. Txawm li cas los xij, cov txheej Al2O3 kuj muaj qee qhov kev txwv.
- Qhov kub ntawm lub substrate rau CVD, feem ntau nyob ib puag ncig700 °C, siab txaus kom yaj cov hlau txhuas. Qhov no txwv cov hom khoom siv uas tuaj yeem tau txais cov txheej.
- Qhov kub siab no tsis zoo rau kev txheej cov khoom siv kho tshuab, tshwj xeeb tshaj yog cov uas ua los ntawm cov hlau sib dua uas muaj cov ntsiab lus yaj qis, xws li txhuas alloy, uas yog siv los txo qhov hnyav ntawm lub tshuab.
- Qhov kub siab tshaj plaws ntawm kev tso dej ntawm kwv yees li1050°Crau Al2O3 coatings tau txwv tsis pub txoj kev loj hlob ntawm ntau yam hybrid coatings, xws li TiC/TiN/TiCN/Al2O3.
- Txo qhov kub ntawm Al2O3 kuj tseem yuav txo cov kev ntxhov siab uas tseem tshuav hauv cov txheej uas feem ntau ua rau tawg.
Silicon Carbide (SiC) CVD Txheej: Kev Ua Tau Zoo thiab Daim Ntawv Thov
Cov yam ntxwv tseem ceeb ntawm SiC CVD Txheej
Silicon Carbide (SiC) CVD coatings muaj ntau yam khoom zoo kawg nkaus, ua rau lawv zoo tagnrho rau cov chaw ib puag ncig hnyav. Cov coatings no qhia txog qhov nyuaj tshwj xeeb, feem ntau yog txij li2000 xyoo to 2800 HV(Vickers hardness). Qhov kev tawv siab no muab kev tiv thaiv kev hnav thiab kev puas tsuaj zoo heev. SiC kuj muaj kev ua tau zoo heev ntawm kev ua kom sov, feem ntau poob ntawm 116 W / mK thiab300 W/mK. Cov cuab yeej no tso cai rau kev ua kom sov zoo. Ntxiv mus, SiC coatings muab cov tshuaj lom neeg tsis muaj zog thiab ultra-high purity. Lawv tiv taus cov tshuaj tiv thaiv nrog cov kua qaub, alkalis, thiab lwm yam tshuaj lom neeg, ua kom muaj kev ruaj khov hauv cov chaw corrosive. Cov tshuaj tiv thaiv no, ua ke nrog kev ruaj khov kub, ua rau SiC yog cov khoom siv xaiv tau zoo.
Cov Kev Siv SiC CVD Txheej Txheem
Cov lag luam siv cov txheej txheem SiC dav dav hauv cov ntawv thov uas xav tau kev ua haujlwm siab thiab kev ntseeg siab. Hauv kev tsav dav hlau, cov chaw tsim khoom siv SiC raucov khoom siv cav, cov teeb meem thermal, cov hniav turbine, cov ntaub thaiv cua sov, cov thrusters, thiab cov rocket nozzles. Cov khoom no ua haujlwm nyob rau hauv qhov kub thiab txias heev. Kev lag luam semiconductor kuj tseem vam khom rau SiC. Nws tiv thaiv cov khoom siv ua wafer, suav nrog cov neeg nqa khoom wafer, cov chav etching, thiab cov chav tso khoom hauv LED thiab semiconductor manufacturing. SiC kuj pom siv rau hauvcov khoom siv hluav taws xob siab thiab siab zaus semiconductors, RF amplifiers, thiab cov khoom siv hloov pauv, qhov twg nws cov khoom hluav taws xob thiab kev dawb huv yog qhov tseem ceeb.
Cov Zoo thiab Cov Kev Txwv ntawm SiC CVD Txheej
Cov txheej txheem SiC muaj cov txiaj ntsig zoo. Lawvkev huv siab heev yog qhov tseem ceeb rau kev tswj hwm qhov chaw tsis muaj kuab paug, tshwj xeeb tshaj yog hauv kev tsim khoom semiconductor. Lawv muab kev ruaj khov hauv qhov chaw ib puag ncig hnyav, tiv thaiv cov khoom siv xws li cov cua sov sib pauv thiab cov reactors hauv kev lag luam zog los ntawm cov tshuaj lom neeg corrosive thiab kub heev. LubKev tsis muaj zog ntawm SiC ua kom muaj kev ruaj khov, txuas ntxiv lub neej ntawm cov khoom siv thiab txo cov kev xav tau txij nkawm. Cov qib siab purity txo cov impurities, txhim kho kev ua tau zoo hauv cov ntawv thov rhiab heev. Txawm li cas los xij, SiC coatings muaj cov kev txwv. Qhov kub siab deposition xav tau rau CVD SiC tuaj yeem txwv nws daim ntawv thov rau qee cov ntaub ntawv substrate. Cov txheej txheem no kuj tseem tuaj yeem nyuaj dua thiab kim dua piv rau lwm txoj kev txheej.
Kev Sib Piv Kev Ua Haujlwm Ncaj Qha ntawm CVD Coatings: TiN vs. Al2O3 vs. SiC
Kev Tshawb Fawb Sib Piv ntawm Qhov Nyuaj thiab Kev Tiv Thaiv Kev Hnav
Txhua txheej CVD muaj qhov zoo sib txawv hauv qhov nyuaj thiab kev tiv taus hnav. Titanium Nitride (TiN) txheej feem ntau qhia txog Vickers hardness txij li 2000 txog 2500 HV. Qhov no muab kev tiv thaiv zoo tiv thaiv kev hnav abrasive. TiN kuj qhia tau tiascov coefficients sib txhuam ntawm 0.4 thiab 0.9. Txawm li cas los xij, kev sib piv ncaj qhantawm cov nqi hnav lossis cov coefficients sib txhuam ntawm TiN, Al2O3, thiab SiC CVD coatings tsis tau sau tseg ntau hauv ib qho kev tshawb fawb, kev tshawb fawb dav dav. Aluminium Oxide (Al2O3) coatings feem ntau muaj Vickers hardness ntawm kwv yees li 1800 HV 0.5, muab kev tiv thaiv zoo heev, tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov kub siab. Silicon Carbide (SiC) coatings sawv tawm nrog qhov nyuaj tshwj xeeb, feem ntau yog txij li 2000 txog 2800 HV. Qhov no ua rau SiC tiv taus ob qho tib si abrasive thiab erosive hnav, feem ntau dhau TiN thiab Al2O3 nyob rau hauv cov xwm txheej hnyav.
Kev Tshawb Fawb Sib Piv ntawm Thermal Stability thiab Oxidation Resistance
Kev ruaj khov ntawm thermal thiab kev tiv thaiv oxidation yog cov yam tseem ceeb rau kev siv kub siab. TiN coatings qhia tau tias muaj kev ruaj khov ntawm thermal. Lawv pib oxidize hauv huab cua ntawm qhov kub siab tshaj 500 ° C. Hauv cov xwm txheej oxygenated, TiN coatingstag nrho oxidize thiab spall hauv ob peb puas teevthaum raug rau qhov chaw kub siab. Qhov no qhia tau tias tsis zoo tiv thaiv nyob rau hauv cov xwm txheej zoo li no. Aluminium Oxide (Al2O3) txheej, ntawm qhov tod tes, muab kev ruaj khov thermal zoo dua thiab tiv taus oxidation. Lawv tiv thaiv cov ntaub ntawv hauv qab ntawm qhov kub tshaj 1000 ° C, ua rau lawv zoo tagnrho rau cov chaw kub heev. Silicon Carbide (SiC) txheej kuj qhia tau tias muaj kev ruaj khov thermal zoo thiab tiv taus oxidation. Cov kws tshawb fawb tau muajpiv rau tus cwj pwm hydrothermal corrosion ntawm SiC nrog Al2O3, qhia txog SiC txoj kev ua tau zoo hauv cov chaw kub thiab tshuaj lom neeg hnyav. SiC tswj nws txoj kev ncaj ncees thiab kev tiv thaiv ntawm qhov kub siab heev, feem ntau tshaj qhov uas TiN yuav lwj.
Kev Tshawb Fawb Sib Piv ntawm Cov Tshuaj Lom Zem thiab Cov Khoom Hluav Taws Xob
Cov tshuaj lom neeg tsis muaj zog thiab cov khoom hluav taws xob ntawm cov txheej no sib txawv heev, cuam tshuam rau lawv qhov kev haum rau cov ntawv thov tshwj xeeb. TiN txheej muab cov tshuaj lom neeg tsis muaj zog zoo, tiv taus ntau yam tshuaj corrosive. Hluav taws xob, TiN loj muaj qhov tiv taus hluav taws xob ntawm 1.0 × 10⁻⁷ thiab 4.0 × 10⁻⁷ Ω·m. PVD TiN qhia txog qhov tiv taus los ntawm 3.0 × 10⁻⁷ txog 1.0 × 10⁻⁶ Ω·m. CVD TiN qhia txog qhov tiv taus ntawm 2.0 × 10⁻⁶ txog 1.0 × 10⁻⁴ Ω·m. Qhov no tso TiN rau hauv pawg semiconductor lossis semi-metallic.
| Khoom siv | Daim Ntawv | Kev Tiv Thaiv Hluav Taws Xob (Ω·m) |
|---|---|---|
| TiN | Ntau ntau | 1.0 × 10⁻⁷ – 4.0 × 10⁻⁷ |
| TiN | PVD | 3.0 × 10⁻⁷ – 1.0 × 10⁻⁶ |
| TiN | CVD | 2.0 × 10⁻⁶ – 1.0 × 10⁻⁴ |
Cov txheej txheej Aluminium Oxide (Al2O3) yog cov tshuaj lom neeg tsis muaj zog heev, tiv taus kev tawm tsam los ntawm feem ntau cov kua qaub, alkalis, thiab lwm yam tshuaj lom neeg. Al2O3 yog lub tshuab hluav taws xob muaj zog. Cov yeeb yaj kiab Al2O3 nyias nyias uas loj hlob los ntawm Atomic Layer Deposition (ALD) qhia txog qhov dielectric tas li ntawm 6.7 rau cov yeeb yaj kiab tuab 120 Å. Qhov ceev tam sim no hauv Al2O3 zaj duab xis txo qis thaum cov zaj duab xis tuab nce, nrog rau cov nqi nyob ib puag ncig 1 nA / cm² rau cov yeeb yaj kiab tuab dua. Fowler-Nordheim (FN) qhov hluav taws xob pib hauv Al2O3 zaj duab xis nce nrog cov tuab, xws li kwv yees li 3 V rau 60 Å zaj duab xis mus txog li 5.5 V rau 184 Å zaj duab xis. Silicon Carbide (SiC) txheej txheej kuj muaj kev tsis muaj zog tshuaj lom neeg tshwj xeeb thiab kev ntshiab siab heev. Lawv tiv taus cov tshuaj tiv thaiv nrog ntau yam tshuaj corrosive. SiC tuaj yeem ua haujlwm ua semiconductor lossis insulator nyob ntawm nws cov doping thiab crystalline qauv. Nws cov hluav taws xob resistivity yog qhov tseem ceeb rau cov ntawv thov hauv cov semiconductors muaj zog thiab zaus siab.
Kev Xav Txog Tus Nqi-Cov Txiaj Ntsig Rau Txhua Yam Khoom Siv CVD Txheej
Kev ntsuam xyuas qhov sib piv ntawm tus nqi thiab cov txiaj ntsig rau txhua cov khoom siv CVD txheej yog qhov tseem ceeb rau kev txiav txim siab zoo. Titanium Nitride (TiN) txheej feem ntau yog qhov kev xaiv pheej yig dua. Lawv muab qhov sib npaug zoo ntawm qhov nyuaj, kev tiv thaiv kev hnav, thiab qhov tiav xim kub zoo nkauj. Qhov no ua rau TiN yog qhov kev xaiv pheej yig rau cov ntawv thov uas xav tau lub neej ntev dua thiab kev tiv thaiv nruab nrab yam tsis muaj kev xav tau kub lossis tshuaj lom neeg heev. Nws siv dav hauv cov cuab yeej txiav thiab cov khoom dai kom zoo nkauj qhia txog nws qhov kev ua tau zoo-rau-tus nqi rau ntau yam kev xav tau kev lag luam.
Cov txheej txheem Aluminium Oxide (Al2O3) feem ntau yuav tsum tau nqis peev ntau dua li TiN. Txawm li cas los xij, lawv qhov kev ruaj khov thermal zoo dua, kev tiv thaiv oxidation, thiab kev tsis muaj tshuaj lom neeg feem ntau ua rau tus nqi nce ntxiv no. Rau cov ntawv thov hauv qhov chaw kub siab, xws li cov khoom siv hauv lub cub tawg lossis cov ntawv txiav siab heev, Al2O3 ua rau lub neej ntawm cov khoom ntev dua. Qhov no txo qhov zaus hloov pauv thiab cov nqi txij nkawm dhau sijhawm. Qhov kev ruaj khov thiab kev tiv thaiv zoo dua Al2O3 muab txhais ua kev txuag nyiaj mus sij hawm ntev, ua rau nws yog qhov kev xaiv zoo txawm tias muaj cov nqi siab dua.
Cov txheej txheem Silicon Carbide (SiC) feem ntau muaj tus nqi thov siab tshaj plaws ntawm peb cov ntaub ntawv. Cov txheej txheem tso tawm nyuaj thiab qhov xav tau kev ntshiab siab heev ua rau muaj qhov nqi no. Txawm hais tias tus nqi siab dua, SiC muaj kev ua tau zoo tsis sib xws hauv cov chaw xav tau tshaj plaws. Nws qhov nyuaj tshwj xeeb, kev tsis muaj tshuaj lom neeg, thiab kev ua kom sov ua rau nws tsis tseem ceeb rau cov ntawv thov tseem ceeb hauv kev ua cov khoom siv semiconductor, aerospace, thiab nuclear. Hauv cov haujlwm no, tus nqi ntawm kev ua tsis tiav lossis kev ua qias tuaj ntau dua li tus nqi txheej txheem pib. SiC lub neej ntev thiab kev tiv thaiv zoo ua kom ntseeg tau tias kev ua haujlwm ntseeg tau thiab kev nyab xeeb, muab kev rov qab los ntawm kev nqis peev rau cov kev xav tau tshwj xeeb, kev ua tau zoo.
Cov Yam Tseem Ceeb Uas Cuam Tshuam Rau Kev Xaiv Cov Khoom Siv Txheej CVD Zoo Tshaj Plaws
Kev xaiv cov khoom siv CVD txheej zoo tshaj plaws yuav tsum nkag siab zoo txog cov kev thov tshwj xeeb. Muaj ob peb qhov ntsuas tseem ceeb uas txiav txim siab qhov kev xaiv no. Kev ruaj khov thiab kev tiv thaiv kev hnav yog qhov tseem ceeb rau cov khoom uas raug kev sib txhuam lossis kev sib txhuam tas li. SiC ua tau zoo hauv cov cheeb tsam no, muab kev tiv thaiv zoo dua rau kev hnav, kev yaig, thiab kev sib txhuam vim nws cov qauv ntom, tsis muaj qhov thiab kev nplaum zoo. Al2O3 kuj muab kev tiv thaiv kev hnav zoo heev, tshwj xeeb tshaj yog thaum kub siab, thaum TiN muab kev tiv thaiv zoo rau cov xwm txheej tsis hnyav.
Kev npog nto thiab qhov nyuaj kuj ua lub luag haujlwm tseem ceeb. Cov txheej txheem CVD feem ntau zoo heevtxheej cov qauv geometries thiab cov nto sab hauv nrog cov tuab sib xwsLawv muab kev pab them nqi sib xws thoob plaws thaj chaw tsis pom kev. Tus cwj pwm no tseem ceeb rau cov khoom sib xyaw uas xav tau kev tiv thaiv sib xws. Kev tiv thaiv ib puag ncig thiab tshuaj lom neeg ntawm cov txheej txheej yog lwm qhov tseem ceeb. Rau cov tshuaj lom neeg xws li H₂S thiab cov kua qaub muaj zog, SiC thiab Al2O3 muab kev tiv thaiv zoo dua vim lawv cov qauv tsis muaj qhov hws, tsim cov khoom thaiv ruaj khov.
Qhov tuab ntawm txheej, feem ntau yog li ntawm 25-75 microns, yog sib xws heev thoob plaws CVD daim ntawv thov. Qhov tuab sib xws no ua rau muaj qhov tiav du thiab polishable. Qhov kub ua haujlwm ntawm daim ntawv thov cuam tshuam rau kev xaiv cov khoom siv. Al2O3 thiab SiC yog qhov tsim nyog rau qhov kub siab dua, tiv thaiv cov ntaub ntawv ruaj khov zoo. Thaum kawg, tus nqi thov, thaum siab dua rau qee cov ntaub ntawv txheej CVD, feem ntau qhia txog lub neej ntev thiab kev tiv thaiv zoo dua. Qhov no ua rau kev nqis peev thawj zaug tsim nyog rau kev txuas ntxiv lub neej ntawm cov khoom thiab ua kom ntseeg tau tias muaj kev ua tau zoo hauv cov chaw lag luam nyuaj.
Cov Xwm Txheej Siv Hauv Lub Ntiaj Teb Tiag: Xaiv Cov Txheej CVD Zoo Tshaj Plaws
CVD Txheej rau Kev Siv Tshuab Ceev thiab Cov Cuab Yeej Txiav
Cov cuab yeej siv tshuab thiab txiav ceev ceev xav tau kev ruaj khov thiab kev tiv thaiv kev hnav zoo heev. Cov cuab yeej no ua haujlwm hauv qab kev sib txhuam thiab cua sov hnyav, uas ua rau cov chaw tsis muaj kev tiv thaiv puas tsuaj sai sai. Kev xaiv cov txheej txheem kom raug ua rau lub cuab yeej siv tau ntev dua thiab txhim kho kev ua haujlwm zoo. Titanium Nitride (TiN) txheej txheem tau ua haujlwm ntev ua tus qauv rau cov cuab yeej txiav dav dav. Lawv muab kev tawv zoo thiab txo kev sib txhuam, uas pab tiv thaiv kev hnav cuab yeej ua ntej lub sijhawm. Txawm li cas los xij, cov ntawv thov tshwj xeeb dua, tshwj xeeb tshaj yog cov hlau tawv, xav tau cov txheej txheem uas muaj kev tiv thaiv kub thiab kev sib txhuam zoo dua.
Rau kev txiav hlau ceev ceev, Aluminium Oxide (Al₂O₃) txheej txheej muajkev ruaj khov zoo heev ntawm thermal thiab tshuaj lom neegThaum kub siab. Qhov kev ruaj khov no ua rau lawv zoo tagnrho rau kev tswj cov cuab yeej kom ruaj khov thaum lub sijhawm ua haujlwm hnyav. Lwm qhov kev sib tw muaj zog hauv thaj chaw no yog Titanium Carbonitride (TiCN). Thaum siv los ntawm CVD, TiCN muab kev tiv thaiv kev hnav zoo heev. Tus cwj pwm no ua pov thawj tshwj xeeb hauv kev ua hlau, qhov twg cov khoom siv tawv hauv qhov workpiece tuaj yeem ua rau lub cuab yeej nto sai sai. Cov txheej txheem siab heev no tso cai rau cov cuab yeej ua haujlwm ntawm qhov ceev thiab pub ntau dua, ua rau muaj kev tsim khoom ntau dua thiab ua tiav qhov chaw zoo dua ntawm cov khoom siv tshuab.
CVD Txheej rau Cov Chaw Tshuaj Corrosive
Cov khoom ua haujlwm hauv cov chaw muaj tshuaj lom neeg corrosive ntsib kev hem thawj tas li los ntawm kev tawm tsam tshuaj lom neeg, uas tuaj yeem ua rau cov khoom puas tsuaj thiab ua tsis tiav ua ntej. Cov txheej txheem tiv thaiv zoo yog qhov tseem ceeb rau kev ua kom muaj sia nyob ntev thiab kev ntseeg siab hauv cov xwm txheej nyuaj no. Aluminium Oxide (Al₂O₃) thiab Silicon Carbide (SiC) CVD txheej txheem sawv tawm rau lawv cov tshuaj lom neeg tsis muaj zog.
Cov txheej txheem Al₂O₃ ua pov thawj tias muaj txiaj ntsig zoo hauv cov dej supercritical (SCW) uas hnyav heev. Cov xwm txheej no muaj qhov kub siab, feem ntau nyob ib puag ncig500 ° C, siab siab ntawm 25 MPa, thiab cov neeg sawv cev oxidizing muaj zog. Alumina-based oxide scales yog paub zoo rau kev txo ntau hom kev xeb hauv SCW tej yam kev mob. Cov no suav nrog kev ntxhov siab corrosion cracking, pitting, thiab kev xeb dav dav, uas ua rau lub neej ntawm cov khoom ntev dua.
Cov txheej txheem SiC feem ntau tiv thaiv cov khoom sib xyaw carbon / carbon (C / C) los ntawm kev oxidation ntawm qhov kub siab, tshwj xeebsiab tshaj 723 K, nyob rau hauv cov chaw muaj oxygen. Qhov kev tiv thaiv no yog qhov tseem ceeb rau C/C composites, vim tias lawv daim ntawv thov ua cov khoom siv kub siab yog txwv los ntawm oxidation. SiC ceramic coatings kuj tiv thaiv C/C composites tiv thaiv oxidation hauv cov chaw muaj dej pa.ntawm 1773 KTxawm hais tias cov dej ua pa tuaj yeem ua rau cov khoom siv SiC ua kom oxidation sai dua, nws kuj pab tsim cov txheej iav. Cov txheej iav no pab kaw thiab tiv thaiv C/C matrix sai dua, ua kom muaj kev ua haujlwm zoo txawm tias nyob rau hauv qhov kub thiab txias heev.
CVD Txheej rau Kev Tiv Thaiv Oxidation Kub Siab
Cov ntaub ntawv uas raug cua sov heev thiab cua oxidizing xav tau cov txheej uas tuaj yeem tiv taus cov xwm txheej hnyav yam tsis muaj kev puas tsuaj. Kev tiv thaiv oxidation mus sij hawm ntev ntawm qhov kub tshaj 1000 ° C yog qhov tseem ceeb rau ntau yam kev siv hauv aerospace, lub zog, thiab kev lag luam.
Cov txheej txheej NiAl uas tau npaj los ntawm CVD qhia tau tias muaj kev sib txuas zoo nrog lub substrate thiab qhov ceev dua. Cov khoom no pab txhawb rau kev tiv thaiv oxidation zoo dua hauv qhov kub thiab txias. Thaum kub thiab txiassiab tshaj 1100 ° C, cov txheej txheem nickel aluminide sai sai tsim cov nplai α-Al₂O₃ uas ruaj khov thermodynamically. Qhov nplai no yog qhov tseem ceeb rau kev muab kev tiv thaiv oxidation mus sij hawm ntev rau cov khoom siv hauv qab.
Cov txheej txheej Silicon Carbide (SiC) kuj ua rau muaj kev tiv thaiv oxidation zoo heev. Lawv ua tiav qhov no los ntawm kev tsim cov txheej iav SiO₂ tiv thaiv. Cov txheej iav no tuaj yeem kho cov qhov tsis zoo xws li cov kab nrib pleb thiab cov qhov hws, tswj cov txheej txheem kom zoo. Piv txwv li, cov txheej txheej SiC tau qhia txog qhov hnyav poob ntawm tsuas yog0.48 wt%tom qab cuaj lub voj voog kub ntawm 1873 K (1600 ° C) thiab chav tsev kub. Qhov tshwm sim no qhia tau tias muaj kev tiv thaiv oxidation zoo txawm tias nyob rau hauv qhov kub hloov pauv heev. Ntxiv mus, ntau txheej SiC / B / SiC coatings muabkev tiv thaiv oxidation zoo tshaj plawsrau cov khoom sib xyaw C/SiC piv rau cov txheej txheej SiC peb txheej. Cov txheej txheem ntau txheej no ua tau zoo thoob plaws ntau qhov kub thiab txias, txij li 700°C txog 1500°C. ZrB₂-SiC kuj tseem lees paub tias yog qhov pibCov khoom siv ceramic kub heev (UHTC)Nws muaj kev tiv thaiv oxidation thiab ablation zoo heev hauv oxidizing atmospheres ntawm qhov kub siab, ua rau nws haum rau cov ntawv thov uas xav tau tshaj plaws.
CVD Txheej rau Kev Rwb Thaiv Hluav Taws Xob thiab Kev Tiv Thaiv Kev Hnav
Cov khoom feem ntau xav tau ob qho tib si hluav taws xob rwb thaiv tsev thiab kev tiv thaiv kev hnav zoo, tshwj xeeb tshaj yog nyob rau hauv cov chaw nyuaj. Silicon Carbide (SiC) coatings zoo heev hauv ob lub luag haujlwm no. Lawv muab kev tswj hwm thermal zoo dua thiab hluav taws xob rwb thaiv tsev, tseem ceeb rau kev ntseeg tau thiab lub neej ntev ntawm cov kab ke hauv tsheb fais fab thiab hybrid. Piv txwv li, SiC coatings yog qhov tseem ceeb hauvcov txheej txheem tswj roj teeb thiab cov khoom siv hluav taws xob muaj zog siabnyob rau hauv lub tsheb lag luam. Cov ntawv thov no xav tau kev tshem tawm cua sov zoo thaum tswj kev rho tawm hluav taws xob.
Cov txheej SiC kuj pom muaj kev siv dav hauv cov ntawv thov hluav taws xob kub siab. Lawv muab kev tswj hwm thermal zoo heev thaum ua kom muaj kev sib cais hluav taws xob hauv cov khoom siv hluav taws xob fais fab, cov khoom siv hluav taws xob ntim khoom, thiab cov khoom siv fais fab. SiC ua haujlwm ua cov khoom siv zoo tshaj plaws rau cov insulators hluav taws xob hauv cov chaw xav tau cua sov uas cov polymer insulators ib txwm yuav lwj. Nws muaj lub zog dielectric siab, feem ntau yog txij li15-25 kV/hli. Tshaj li cov khoom siv hluav taws xob, SiC coatings muab kev tiv thaiv kev hnav zoo heev hauv kev siv hauv kev lag luam. Cov khoom tiv thaiv nrog SiC coatings qhia tau tias lub neej kev pabcuam zoo dua, feem ntau 3-5 zaug ntev dua li cov ntaub ntawv ib txwm muaj, hauv kev ua haujlwm twj slurry. Qhov kev txhim kho no los ntawm lawv qhov ntom ntom, tsis muaj qhov thiab txo qhov sib txhuam. Ib yam li ntawd, SiC coatings txhim kho kev hnav tsis kam hauv cov chaw ua haujlwm abrasive heev xws li kev ua haujlwm sandblasting. Cov khoom siv valve, twj tso kua mis foob, nozzles, thiab cov kabmob kuj tau txais txiaj ntsig los ntawm kev ua tau zoo hnav ntawm SiC coatings, zoo daws teeb meem kev hnav khoom siv ua lub hauv paus tseem ceeb.
CVD Txheej rau Semiconductor Processing thiab High-Purity Xav Tau
Kev lag luam semiconductor xav tau cov ntaub ntawv uas muaj kev ntshiab siab heev thiab kev tsis muaj tshuaj lom neeg tshwj xeeb los tiv thaiv kev ua qias tuaj thiab xyuas kom meej tias cov txheej txheem ua tiav. Khoom Siv Silicon Carbide (CVD SiC) yog qhov kev xaiv tseem ceeb rau cov khoom hauv cov khoom siv ua semiconductor. Qhov no suav nrog cov khoom xws li RTP / EPI rings thiab bases, thiab plasma etch cavity Cheebtsam. Cov chaw tsim khoom nyiam CVD SiC vim nws qhov kev ntshiab siab heev,tshaj 99.9995%. Nws kuj muaj kev tiv thaiv zoo rau cov tshuaj lom neeg. Ntxiv mus, CVD SiC txo cov khoom me me vim nws tsis muaj theem thib ob ntawm cov npoo ntawm cov noob. Cov khoom no tuaj yeem ntxuav tau zoo nrog HF / HCl kub yam tsis muaj kev puas tsuaj loj. Cov yam ntxwv no pab txhawb rau lub neej ua haujlwm ntev dua thiab tsawg dua cov khoom me me, uas yog qhov tseem ceeb rau kev tswj hwm cov xwm txheej zoo nkauj uas xav tau hauv kev tsim khoom semiconductor.
CVD Txheej rau Multilayer Systems thiab Kev Ua Haujlwm Zoo Dua
Cov txheej txheem txheej ntau txheej sib xyaw cov khoom sib txawv kom ua tiav kev ua tau zoo dua li qhov ib txheej tuaj yeem muab tau. Cov txheej txheem no siv cov khoom tshwj xeeb ntawm txhua txheej los tsim kom muaj kev sib koom ua ke. Piv txwv li, ib txheej yuav muab qhov tawv zoo heev, thaum lwm txheej muab kev tiv thaiv corrosion zoo dua lossis thermal stability. Txoj hauv kev no tso cai rau cov engineers los kho cov txheej kom raug rau cov kev xav tau tshwj xeeb. Cov txheej txheem ntau txheej tuaj yeem kov yeej cov kev txwv ntawm cov khoom ib leeg. Piv txwv li, ib txheej tawv tab sis brittle tuaj yeem ua ke nrog ib txheej tawv dua, ductile ntau dua los txhim kho kev tiv thaiv kev tawg tag nrho. Ib yam li ntawd, ib txheej uas muaj kev tiv thaiv oxidation siab tuaj yeem tiv thaiv ib txheej hauv qab uas muab kev tiv thaiv kev hnav zoo heev tab sis yooj yim rau kev puas tsuaj kub siab. Kev sib xyaw ua ke ntawm cov khoom no ua rau cov txheej nrog kev ruaj khov zoo dua, lub neej ntev dua, thiab kev ua haujlwm zoo dua hauv cov chaw ua haujlwm nyuaj.
Qhov kev xaiv cov khoom siv CVD zoo tshaj plaws nyob ntawm seb muaj kev thov tshwj xeeb li cas. TiN, Al2O3, thiab SiC CVD coatings txhua yam muaj txiaj ntsig zoo rau ntau yam kev sib tw hauv kev lag luam. Kev txiav txim siab raws li lawv cov qauv kev ua tau zoo sib txawv ua rau lub sijhawm ua haujlwm ntev thiab ua haujlwm tau zoo tshaj plaws. Cov kws ua haujlwm yuav tsum xav txog txhua yam kom xaiv cov khoom siv zoo tshaj plaws rau lawv cov kev xav tau tshwj xeeb. Qhov no ua kom muaj kev tiv thaiv zoo dua thiab lub neej ua haujlwm ntev rau cov khoom tseem ceeb.
Cov Lus Nug Feem Ntau
Qhov zoo tshaj plaws ntawm TiN CVD txheej yog dab tsi?
Cov txheej txheej TiN muaj qhov tawv thiab tiv taus kev hnav zoo heev. Lawv kuj muab kev ruaj khov zoo rau tshuaj lom neeg. Ntau lub lag luam siv TiN rau cov cuab yeej txiav thiab cov ntawv thov kho kom zoo nkauj. Nws sib npaug kev ua tau zoo thiab tus nqi tsim nyog.
Cov txheej CVD twg muab qhov zoo tshaj plaws tiv taus oxidation ntawm qhov kub siab heev?
Cov txheej Al2O3 thiab SiC CVD ob leeg muaj kev tiv thaiv oxidation zoo dua. Al2O3 tiv thaiv cov ntaub ntawv saum toj no 1000 ° C. SiC tsim ib txheej iav SiO2 tiv thaiv, ua haujlwm tau zoo txawm tias ntawm 1600 ° C. Lawv ua tau zoo heev hauv qhov kub heev.
Vim li cas SiC CVD txheej thiaj li nyiam siv rau kev ua cov semiconductor?
Cov txheej SiC muab kev ntshiab siab heev, tshaj 99.9995%. Lawv muab kev tiv thaiv tshuaj lom neeg zoo heev thiab txo qis kev tsim cov khoom me me. Cov khoom no yog qhov tseem ceeb rau kev tiv thaiv kev ua qias tuaj hauv cov chaw tsim khoom semiconductor rhiab heev.
Cov txheej txheem CVD puas muaj kev txwv txog cov ntaub ntawv substrate?
Yog lawm, cov txheej txheem CVD feem ntau xav tau qhov kub siab rau kev tso cov khoom. Qhov no txwv lawv txoj kev siv rau qee cov ntaub ntawv substrate. Piv txwv li, qhov kub siab tuaj yeem yaj cov hlau uas tsis yaj zoo li cov hlau txhuas.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-17-2025