Incazelo ejwayelekile ye-Reaction Bonded SiC

Jikeleleincazelo yeUkusabelaI-SiC Ehlanganisiwe

I-Reaction Bonded SiC inezakhiwo zomshini kanye nokumelana nokushiswa kwe-oxidation. Izindleko zayo ziphansi kakhulu. Emphakathini wamanje, idonsele ukunaka okwengeziwe ezimbonini ezahlukahlukene.

I-SiC iyisibopho esiqinile kakhulu se-covalent. Ekushiseni, izinga lokusabalala liphansi kakhulu. Ngesikhathi esifanayo, ubuso bezinhlayiya buvame ukumboza ungqimba lwe-oxide oluncane oludlala indima yomgoqo wokusabalalisa. I-Pure SiC ayishisi kakhulu futhi ayihlangani ngaphandle kwezithasiselo zokushisi. Ngisho noma kusetshenziswa inqubo yokucindezela okushisa, kumele futhi ikhethe izithasiselo ezifanele. Kuphela emazingeni okushisa aphezulu kakhulu, lapho izinto ezifanelekela ubuningi bobunjiniyela obuseduze nobuningi bethiyori zingatholakala khona okufanele zibe sebangeni elisukela ku-1950 ℃ kuya ku-2200 ℃. Ngesikhathi esifanayo, ukuma nobukhulu bayo kuzonqunyelwa. Nakuba izinhlanganisela ze-SIC zingatholakala ngokubeka umusi, zinqunyelwe ekulungiseleleni izinto eziphansi noma ezingqimbeni ezincane. Ngenxa yesikhathi sayo eside sokuthula, izindleko zokukhiqiza zizokhula.

I-Reaction Bonded SiC yasungulwa ngo-1950 nguPopper. Isimiso esiyisisekelo yilesi:

Ngaphansi kwesenzo samandla e-capillary, i-silicon ewuketshezi noma i-silicon alloy enomsebenzi ophendulayo ingena ku-ceramics ezinezimbobo eziqukethe i-carbon futhi yakhe i-carbon silicon ekuphenduleni. I-silicon carbide esanda kwakheka iboshelwe ezinhlayiyeni ze-silicon carbide zokuqala endaweni, futhi izimbobo ezisele ku-filler zigcwaliswa nge-ejenti yokufaka ukuze kuqedwe inqubo yokuqina.

Uma kuqhathaniswa nezinye izinqubo ze-silicon carbide ceramics, inqubo yokusila inezici ezilandelayo:

Izinga lokushisa eliphansi lokucubungula, isikhathi esifushane sokucubungula, asikho isidingo semishini ekhethekile noma ebizayo;

Izingxenye ezihlanganisiwe ezingenakho ukuncishiswa noma ukushintsha kosayizi;

Izindlela zokubumba ezahlukahlukene (ukukhipha, ukujova, ukucindezela kanye nokuthulula).

Kunezindlela eziningi zokubumba. Ngesikhathi sokusila, imikhiqizo emikhulu neyinkimbinkimbi ingakhiqizwa ngaphandle kokucindezelwa. Ubuchwepheshe be-Reaction Bonded be-silicon carbide bufundwe iminyaka engamashumi amahlanu. Lobu buchwepheshe sebungenye yezinto ezigxilwe kakhulu ezimbonini ezahlukahlukene ngenxa yezinzuzo zabo eziyingqayizivele.