Ukuqhathaniswa kwenqubo yokubumba i-silicon carbide ceramic: inqubo yokucwenga kanye nezinzuzo zayo kanye nokubi kwayo

I-silicon carbide ceramicukuqhathanisa inqubo yokubumba: inqubo yokusila kanye nezinzuzo kanye nokubi kwayo

Ekukhiqizweni kwe-silicon carbide ceramics, ukwakheka kuyisixhumi esisodwa kuphela kuyo yonke inqubo. Ukusinta yinqubo eyinhloko ethinta ngqo ukusebenza kokugcina kanye nokusebenza kwe-ceramics. Kunezindlela eziningi ezahlukene zokusinta i-silicon carbide ceramics, ngayinye inezinzuzo zayo kanye nokungalungi kwayo. Kulesi sihloko sebhulogi, sizohlola inqubo yokusinta ye-silicon carbide ceramics bese siqhathanisa izindlela ezahlukene.

1. Ukusabela okubangela ukucasuka:
Ukusika i-reaction kuyindlela ethandwayo yokwenza izinto ze-silicon carbide ceramics. Lena inqubo elula futhi engabizi kakhulu ecishe ibe yi-net to size. Ukusika i-sinter kufezwa ngokusabela kwe-silicidation ekushiseni okuphansi okungu-1450 ~ 1600 °C kanye nesikhathi esifushane. Le ndlela ingakhiqiza izingxenye ezinkulu nezimo eziyinkimbinkimbi. Kodwa-ke, inezinkinga zayo. Ukusabela kwe-siliconizing kuholela ku-8% ~ 12% free silicon ku-silicon carbide, okunciphisa izakhiwo zayo zomshini zokushisa okuphezulu, ukumelana nokugqwala, kanye nokumelana ne-oxidation. Futhi izinga lokushisa lokusetshenziswa lilinganiselwe ngaphansi kuka-1350 °C.

2. Ukucindezela okushisayo:
Ukucindezela okushisayo kungenye indlela evamile yokucindezela i-silicon carbide ceramics. Kule ndlela, i-silicon carbide powder eyomile igcwaliswa ibe yisikhunta bese ishiswa ngenkathi kusetshenziswa ingcindezi evela ohlangothini olulodwa. Lokhu kushisa kanye nokucindezela ngasikhathi sinye kukhuthaza ukusabalala kwezinhlayiya, ukugeleza, kanye nokudluliselwa kwesisindo, okuholela ku-silicon carbide ceramics enezinhlamvu ezincane, ubuningi obuphezulu, kanye nezakhiwo ezinhle kakhulu zemishini. Kodwa-ke, ukucindezela okushisayo nakho kunezinkinga zako. Inqubo iyinkimbinkimbi kakhulu futhi idinga izinto zokwakheka zekhwalithi ephezulu kanye nemishini. Ukusebenza kahle kokukhiqiza kuphansi futhi izindleko ziphezulu. Ngaphezu kwalokho, le ndlela ifaneleka kuphela emikhiqizweni enezimo ezilula.

3. Ukucindezela okushisayo kwe-isostatic:
Ukushiswa kwe-hot isostatic pressing (HIP) kuyindlela ehilela isenzo esihlangene segesi ephezulu yokucindezela okushisa okuphezulu kanye ne-isotropically balanced. Isetshenziselwa ukushiswa kwe-silicon carbide ceramic powder, umzimba oluhlaza noma umzimba osikiwe ngaphambili. Nakuba ukushiswa kwe-HIP kungathuthukisa ukusebenza kwe-silicon carbide ceramics, akusetshenziswa kabanzi ekukhiqizweni ngobuningi ngenxa yenqubo eyinkimbinkimbi kanye nezindleko eziphakeme.

4. Ukushisa okungenangcindezi:
Ukushisa ngaphandle kokucindezela kuyindlela esebenza kahle kakhulu ekushiseni okuphezulu, inqubo elula yokushisa kanye nezindleko eziphansi ze-silicon carbide ceramics. Iphinde ivumele izindlela eziningi zokwakha, okwenza ifaneleke ezimweni eziyinkimbinkimbi kanye nezingxenye ezijiyile. Le ndlela ifaneleka kakhulu ekukhiqizweni okukhulu kwe-silicon ceramics ezimbonini.

Ngamafuphi, inqubo yokusila iyisinyathelo esibalulekile ekukhiqizweni kwe-SiC ceramics. Ukukhetha indlela yokusila kuncike ezintweni ezifana nezakhiwo ezifunwayo ze-ceramic, ubunzima besimo, izindleko zokukhiqiza kanye nokusebenza kahle. Indlela ngayinye inezinzuzo nezinkinga zayo, futhi kubalulekile ukucabangela ngokucophelela lezi zici ukuze kunqunywe inqubo yokusila efaneleka kakhulu yesicelo esithile.