Pamene silicon carbide crystal ikukula, "malo" a kukula kwa mawonekedwe pakati pa axial pakati pa kristalo ndi m'mphepete mwake ndi osiyana, kotero kuti kupanikizika kwa kristalo pamphepete kumawonjezeka, ndipo m'mphepete mwa kristalo ndi wosavuta kutulutsa "zilema zonse" chifukwa. ku chikoka cha graphite stop mphete "carbon", momwe angathetsere vuto m'mphepete kapena kuonjezera malo ogwira pakati (kuposa 95%) ndi yofunika luso mutu.
Monga zolakwika zazikulu monga "microtubules" ndi "inclusions" zimayendetsedwa pang'onopang'ono ndi mafakitale, zovuta zamakristali a silicon carbide kuti "akule mofulumira, motalika komanso mozama, ndikukula", m'mphepete mwa "zilema zambiri" ndizodziwika bwino, ndipo Kuwonjezeka kwa m'mimba mwake ndi makulidwe a silicon carbide makhiristo, m'mphepete "zolakwika zonse" zidzachulukitsidwa ndi mainchesi ndi makulidwe.
Kugwiritsa ntchito tantalum carbide TaC ❖ kuyanika ndi kuthetsa vuto la m'mphepete ndikuwongolera kukula kwa kristalo, yomwe ndi imodzi mwamaupangiri aukadaulo a "kukula mwachangu, kukula kolimba komanso kukula". Pofuna kulimbikitsa chitukuko cha luso makampani ndi kuthetsa "kuitanitsa" kudalira zipangizo zofunika, Hengpu yapambana anathetsa tantalum carbide ❖ kuyanika luso (CVD) ndipo anafika mlingo mayiko apamwamba.
Tantalum carbide TaC ❖ kuyanika, kuchokera mmene kuzindikira si kovuta, ndi sintering, CVD ndi njira zina n'zosavuta kukwaniritsa. Sintering njira, ntchito tantalum carbide ufa kapena kalambulabwalo, kuwonjezera yogwira zosakaniza (nthawi zambiri zitsulo) ndi kugwirizana wothandizira (zambiri unyolo polima), TACHIMATA pamwamba pa graphite gawo lapansi sintered pa kutentha. Mwa njira ya CVD, TaCl5+H2+CH4 idayikidwa pamwamba pa matrix a graphite pa 900-1500 ℃.
Komabe, magawo oyambira monga kristalo wa tantalum carbide deposition, makulidwe a filimu yofananira, kutulutsa kupsinjika pakati pa zokutira ndi ma graphite matrix, ming'alu yapamtunda, ndi zina zambiri, ndizovuta kwambiri. Makamaka mu chilengedwe cha kukula kwa sic crystal, moyo wokhazikika wautumiki ndi gawo lalikulu, ndilovuta kwambiri.
Nthawi yotumiza: Jul-21-2023