Xa i-silicon carbide crystal ikhula, "imeko-bume" yojongano lokukhula phakathi kweziko le-axial le-crystal kunye nomphetho iyahluka, ukuze uxinzelelo lwe-crystal kumphetho lunyuke, kwaye umphetho we-crystal kube lula ukuvelisa "iziphene ezibanzi" ngenxa yempembelelo ye-graphite stop ring "carbon", indlela yokusombulula ingxaki yomphetho okanye ukwandisa indawo esebenzayo yeziko (ngaphezulu kwama-95%) sisihloko esibalulekileyo sobugcisa.
Njengoko iziphene ezinkulu ezifana “ne-microtubules” kunye “ne-inclusions” zilawulwa kancinci kancinci lishishini, zicela umngeni kwiikristale ze-silicon carbide ukuba “zikhule ngokukhawuleza, zibe nde kwaye zityebe, kwaye zikhule”, “iziphene ezibanzi” ezisemaphethelweni zibonakala ngokungaqhelekanga, kwaye ngokwanda kobubanzi kunye nobukhulu beekristale ze-silicon carbide, “iziphene ezibanzi” ezisemaphethelweni ziya kuphinda-phindwa ngesikwere sobubanzi kunye nobukhulu.
Ukusetyenziswa kwe-tantalum carbide TaC coating kukusombulula ingxaki yomphetho kunye nokuphucula umgangatho wokukhula kwekristale, enye yezona ndlela ziphambili zobugcisa "zokukhula ngokukhawuleza, ukukhula kube lukhuni nokukhula". Ukuze kukhuthazwe uphuhliso lwetekhnoloji yoshishino kunye nokusombulula ukuxhomekeka "kokungenisa" kwezinto ezibalulekileyo, iHengpu iphumelele ekusombululeni itekhnoloji ye-tantalum carbide coating (CVD) kwaye yafikelela kwinqanaba eliphezulu lamazwe ngamazwe.
Ukugquma iTaC ngeTantalum carbide, ngokwembono yokufezekisa akunzima, ngokugquma, iCVD kunye nezinye iindlela kulula ukuzifeza. Indlela yokugquma, ukusetyenziswa kwe-tantalum carbide powder okanye i-precursor, ukongeza izithako ezisebenzayo (ngokubanzi isinyithi) kunye ne-bonding agent (ngokubanzi i-long chain polymer), egqunywe kumphezulu we-graphite substrate egqunywe kubushushu obuphezulu. Ngokwendlela yeCVD, iTaCl5+H2+CH4 yafakwa kumphezulu we-graphite matrix kwi-900-1500℃.
Nangona kunjalo, iiparameter ezisisiseko ezifana nokujongwa kwekristale ye-tantalum carbide deposition, ubukhulu befilimu efanayo, ukukhululwa koxinzelelo phakathi kwe-coating kunye ne-graphite matrix, imifantu yomphezulu, njl.njl., zinzima kakhulu. Ingakumbi kwindawo yokukhula kwekristale, ubomi benkonzo ezinzileyo yeyona parameter iphambili, yeyona inzima.
Ixesha lokuthumela: Julayi-21-2023