M'zaka za m'ma 2000, ndi chitukuko cha sayansi ndi ukadaulo, chidziwitso, mphamvu, zipangizo, uinjiniya wa zamoyo zakhala mizati inayi ya chitukuko cha zokolola za anthu masiku ano, silicon carbide chifukwa cha mphamvu zokhazikika za mankhwala, kutentha kwakukulu, kutentha kokwanira kwa kachulukidwe kakang'ono, kocheperako, kukana bwino kuvala, kuuma kwakukulu, mphamvu yayikulu yamakina, kukana dzimbiri kwa mankhwala ndi makhalidwe ena, kukula mwachangu m'munda wa zipangizo, Amagwiritsidwa ntchito kwambiri mu ceramic ball bearing, ma valve, semiconductor materials, gyro, chida choyezera, ndege ndi zina.
Zoumba za silicon carbide zapangidwa kuyambira m'ma 1960. Kale, silicon carbide inkagwiritsidwa ntchito kwambiri popanga zinthu zopangira makina komanso zopukutira. Mayiko padziko lonse lapansi amaika patsogolo kwambiri mafakitale a zoumba zaukadaulo, ndipo tsopano sakukhutira ndi kukonzekera zoumba zachikhalidwe za silicon carbide, koma kupanga mabizinesi apamwamba a ceramics kukukula mwachangu, makamaka m'maiko otukuka. M'zaka zaposachedwa, zoumba za SIC zokhala ndi magawo ambiri zawonekera limodzi motsatizana, zomwe zimapangitsa kuti zinthu za monomer zikhale zolimba komanso zolimba. Silicon carbide imagwiritsa ntchito magawo anayi akuluakulu, omwe ndi zoumba zaukadaulo zogwira ntchito, zinthu zapamwamba zopukutira, zopukutira ndi zopangira zitsulo.
Ma ceramic a silicon carbide ali ndi kukana kwakukulu kovala
Zinthu zomangira za silicon carbide izi zaphunziridwa ndi kutsimikiziridwa. Kukana kwa silicon carbide ceramics izi ndizofanana ndi chitsulo cha manganese nthawi 266, chofanana ndi nthawi 1741 za chitsulo cha chromium cast. Kukana kwa kuvala ndikwabwino kwambiri. Zingatipulumutsebe ndalama zambiri. Zinthu zomangira za silicon carbide zitha kugwiritsidwa ntchito mosalekeza kwa zaka zoposa khumi.
Zitsulo za silicon carbide zimakhala ndi mphamvu zambiri, kuuma kwakukulu komanso kulemera kopepuka.
Monga mtundu watsopano wa zinthu, kugwiritsa ntchito silicon carbide ceramics izi ndizovuta kwambiri, kuuma kwambiri, kulemera kwake ndi kopepuka kwambiri, silicon carbide ceramics yogwiritsidwa ntchito, kuyika ndi kusintha zomwe zili pamwambapa kudzakhala kosavuta.
Khoma lamkati la silicon carbide ceramic ndi losalala ndipo silimatseka ufa
Zoumba za silicon carbide izi zimayatsidwa kutentha kwambiri, kotero kapangidwe ka zoumba za silicon carbide ndi kolimba, pamwamba pake ndi posalala, kukongola kwa kugwiritsa ntchito kudzakhala kwabwino kwambiri, kotero kugwiritsidwa ntchito m'banja, kukongola kudzakhala kwabwino kwambiri.
Mtengo wa silicon carbide ceramics ndi wotsika
Mtengo wopanga zinthu za silicon carbide ndi wotsika, kotero sitifunika kugula mtengo wa zinthu za silicon carbide zodula kwambiri, kotero kwa banja lathu, komanso zingatipulumutse ndalama zambiri.
Kugwiritsa ntchito silicon carbide ceramic:
Mpira wa ceramic wa silicon carbide
Mpira wa ceramic wa Silicon carbide uli ndi mphamvu zabwino kwambiri zamakanika, kukana kwabwino kwambiri kwa okosijeni, kukana kwamphamvu kwambiri komanso kukana kotsika. Mpira wa ceramic wa Silicon carbide uli ndi mphamvu yotentha kwambiri, zinthu wamba za ceramic pa 1200 ~ 1400 digiri Celsius mphamvu zidzachepetsedwa kwambiri, ndipo silicon carbide pa 1400 digiri Celsius mphamvu yopindika imasungidwabe pamlingo wapamwamba wa 500 ~ 600MPa, kotero kutentha kwake kogwira ntchito kumatha kufika 1600 ~ 1700 digiri Celsius.
Zinthu zopangidwa ndi silicon carbide
Ma silicon carbide matrix composites (SiC-CMC) akhala akugwiritsidwa ntchito kwambiri mumlengalenga chifukwa cha kutentha kwawo kwakukulu chifukwa cha kulimba kwawo kwakukulu, mphamvu zawo zambiri komanso kukana kwabwino kwa okosijeni. Njira yokonzekera SiC-CMC imaphatikizapo kukonza ulusi, kukonza kutentha kwambiri, kuphimba mesophase, kukhuthala kwa matrix ndi chithandizo pambuyo pake. Ulusi wa carbon wamphamvu kwambiri uli ndi mphamvu zambiri komanso kulimba bwino, ndipo thupi lopangidwa kale lomwe limapangidwa nalo lili ndi mphamvu zabwino zamakanika.
Kuphimba kwa mesophase (ndiko kuti, ukadaulo wa mawonekedwe) ndiye ukadaulo wofunikira kwambiri pakukonzekera, njira zokonzekera mesophase zikuphatikizapo chemical vapor osmosis (CVI), chemical vapor deposition (CVD), sol-sol method (Sol-gcl), polymer impregnation cracking method (PLP), yoyenera kwambiri pokonzekera silicon carbide matrix composites ndi CVI method ndi PIP method.
Zipangizo zophikira pakati pa nkhope zimaphatikizapo pyrolytic carbon, boron nitride ndi boron carbide, zomwe boron carbide monga mtundu wa oxidation resistance interfacial coating yakhala ikusamalidwa kwambiri. SiC-CMC, yomwe nthawi zambiri imagwiritsidwa ntchito muzochitika za oxidation kwa nthawi yayitali, imafunikanso kuchitidwa chithandizo cha oxidation resistance, kutanthauza kuti, wosanjikiza wa silicon carbide wokhuthala wokhala ndi makulidwe a pafupifupi 100μm umayikidwa pamwamba pa chinthucho ndi njira ya CVD kuti ikonze kukana kwake kutentha kwambiri kwa oxidation.
Nthawi yotumizira: Feb-14-2023