Lokacin da lu'ulu'u na silicon carbide ke tsiro, "yanayin" haɗin girma tsakanin tsakiyar axial na lu'ulu'u da gefen ya bambanta, don haka matsin lambar lu'ulu'u a gefen yana ƙaruwa, kuma gefen lu'ulu'u yana da sauƙin samar da "cikakken lahani" saboda tasirin zoben tsayawa na graphite "carbon", yadda za a magance matsalar gefen ko ƙara yankin da ya dace na tsakiya (fiye da 95%) muhimmin batu ne na fasaha.
Yayin da masana'antu ke sarrafa ƙananan lahani kamar "microtubules" da "inclusions" a hankali, suna ƙalubalantar lu'ulu'u na silicon carbide su "girma da sauri, tsayi da kauri, da girma", "cikakkun lahani" na gefen sun bayyana sosai, kuma tare da ƙaruwar diamita da kauri na lu'ulu'u na silicon carbide, za a ninka "cikakkun lahani" na gefen ta hanyar murabba'i da kauri.
Amfani da rufin TaC na Tantalum carbide shine magance matsalar gefen da kuma inganta ingancin girman lu'ulu'u, wanda shine ɗayan manyan hanyoyin fasaha na "girma da sauri, girma da girma". Domin haɓaka haɓaka fasahar masana'antu da kuma magance dogaro da kayan aiki masu mahimmanci, Hengpu ya sami nasarar warware fasahar rufe tantalum carbide (CVD) kuma ya kai matakin ci gaba na duniya.
Shafa TaC ta Tantalum carbide, daga mahangar aiwatarwa, ba abu ne mai wahala ba, tare da yin sintering, CVD da sauran hanyoyi suna da sauƙin cimmawa. Hanyar yin sintering, amfani da foda tantalum carbide ko precursor, ƙara sinadaran aiki (galibi ƙarfe) da wakilin haɗawa (galibi dogon sarkar polymer), wanda aka shafa a saman substrate na graphite da aka yi sintering a babban zafin jiki. Ta hanyar hanyar CVD, an sanya TaCl5+H2+CH4 a saman matrix na graphite a 900-1500℃.
Duk da haka, sigogi na asali kamar yanayin lu'ulu'u na ajiyar tantalum carbide, kauri na fim iri ɗaya, sakin damuwa tsakanin shafi da matrix na graphite, fashewar saman, da sauransu, suna da matuƙar ƙalubale. Musamman a yanayin ci gaban lu'ulu'u na sic, tsawon rai mai ɗorewa shine babban ma'aunin, shine mafi wahala.
Lokacin Saƙo: Yuli-21-2023