Mahimmin Ƙirƙirar Tubalin Silicon Carbide
"Tsarin sa hannu" na tubalin siliki carbide yana buƙatar daidaito, kamar gasa kek:
- Silicon carbide barbashi: 60% -90% abun ciki; matakan tsafta suna ba da izini na thermal conductivity da juriya na lalata.
- Tsarin ɗaure: Zaɓin yumbu, silica sol, ko guduro; Yana ƙayyade ƙarfin gyare-gyare da aikin sintiri.
- Abubuwan da ake kara ganowa: Silicon karfe foda yana haɓaka juriya na iskar shaka, yayin da ba kasafai ba - oxides na duniya suna inganta kwanciyar hankali mai girma -.
"Lokacin Magic" a cikin Gudanarwa
Abubuwan al'ajabi suna buɗewa lokacin da albarkatun ƙasa suka hadu da yanayin zafi:
- Matakin gyare-gyare: Ƙunƙarar gyare-gyare a 200-300 MPa; Dole ne ma'aunin yawa ya kasance ƙasa da 0.5%.
- Lokacin bushewa: jinkirin bushewa a digiri 80 na sa'o'i 48; Dole ne a sarrafa abun cikin danshi a ƙasa da 0.3%.
- Maɓalli na sintering: Harba a digiri 1450 a ƙarƙashin yanayin nitrogen na sa'o'i 18 yana tabbatar da cikakkiyar haɗuwa da iyakokin hatsi na silicon carbide.
Bambance-bambancen Tsarin Tsarin Mulki
Silicon carbide tubalin don aikace-aikace daban-daban suna kama da kwat da wando:
- Metallurgical bricks: >85% silicon carbide abun ciki tare da silicon karfe rufi; yana ba da juriya mai ƙarfi ga yashwar slag.
- Kayan daki na yumbu: Tsarin ƙura mai ƙyalƙyali wanda aka haɗe tare da ƙirar haɓaka ƙarancin zafi; jure da sauri thermal hawan keke (thermal shock).
- Sinadarai masu rufi: Boron carbide da aka kara don ƙara taurin; yana tsawaita rayuwar sabis a kan acid da alkalis sau uku.