Lokacin da siliki carbide crystal girma, "yanayin" na haɓaka haɓaka tsakanin cibiyar axial na crystal da gefen ya bambanta, don haka damuwa na kristal a gefen yana ƙaruwa, kuma gefen crystal yana da sauƙi don samar da "cikakkun lahani" saboda. zuwa tasiri na graphite dakatar zobe "carbon", yadda za a warware matsalar gefen ko ƙara tasiri yankin cibiyar (fiye da 95%) wani muhimmin batu na fasaha.
Kamar yadda macro lahani irin su "microtubules" da "inclusions" ana sarrafa su a hankali ta hanyar masana'antu, ƙalubalantar silicon carbide lu'ulu'u don "girma da sauri, tsayi da kauri, da girma", gefen "cikakkun lahani" sun shahara sosai, kuma tare da karuwa a diamita da kauri na silicon carbide lu'ulu'u, gefen "cikakkun lahani" za a ninka ta hanyar diamita na diamita da kauri.
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