Lokacin da silicon carbide crystal girma, da "yanayin" na ci gaban ke dubawa tsakanin axial cibiyar crystal da gefen ne daban-daban, don haka da cewa crystal danniya a kan gefen ya karu, da kuma crystal gefen yana da sauƙi don samar da "cikakken lahani" saboda tasirin graphite tasha zobe "carbon", yadda za a warware matsalar gefen ko ƙara tasiri yankin cibiyar (fiye da 95 mafi muhimmanci batu).
Kamar yadda macro lahani kamar "microtubules" da "inclusions" ana sarrafa a hankali ta masana'antu, ƙalubalanci silicon carbide lu'ulu'u don "girma da sauri, tsawo da kuma lokacin farin ciki, da kuma girma", gefen "m lahani" ne abnormally shahararru, kuma tare da karuwa a cikin diamita da kauri na silicon carbide lu'ulu'u, da diamita "m square lahani" da diamita kauri baki zai zama multiplied gefen.
Yin amfani da tantalum carbide TaC shafi shine don magance matsalar gefen kuma inganta ingancin ci gaban kristal, wanda shine ɗayan mahimman kwatancen fasaha na "girma da sauri, girma lokacin farin ciki da girma". Domin inganta ci gaban fasahar masana'antu da kuma warware dogara da "shigo da" abubuwan da ke da mahimmanci, Hengpu ya sami nasarar warware fasahar tantalum carbide (CVD) kuma ta kai matakin ci gaba na duniya.
Tantalum carbide TaC shafi, daga hangen nesa ba wuya, tare da sintering, CVD da sauran hanyoyin da sauki a cimma. Hanyar sintering, yin amfani da tantalum carbide foda ko precursor, ƙara aiki sinadaran (gaba ɗaya karfe) da bonding wakili (gaba ɗaya dogon sarkar polymer), mai rufi zuwa saman graphite substrate sintered a high zafin jiki. Ta hanyar CVD, TaCl5+H2+CH4 an ajiye shi akan saman matrix graphite a 900-1500℃.
Duk da haka, ainihin sigogi irin su crystal fuskantarwa na tantalum carbide ajiya, kauri film kauri, danniya saki tsakanin shafi da graphite matrix, surface fasa, da dai sauransu, ne musamman kalubale. Musamman a cikin yanayin haɓakar sic crystal, ingantaccen rayuwar sabis shine ainihin siga, shine mafi wahala.
Lokacin aikawa: Yuli-21-2023