Ukulungiswa kanye nezakhiwo ze-silicon carbide ceramics ngokuphendula sintering

I-Silicon carbide (SiC) iyinhlanganisela ehlangene eyakhiwe nge-carbon ne-silicon futhi yaziwa ngezakhiwo zayo ezinhle kakhulu, okuhlanganisa ukumelana nokugqoka okuphezulu, ukumelana nokushaqeka okushisayo, ukumelana nokugqwala okuqinile kanye ne-thermal conductivity ephezulu. Lezi zakhiwo zenza i-silicon carbide ibe into efanelekile yokusetshenziswa okuhlukahlukene ezimbonini eziningi, okuhlanganisa i-aerospace, ukukhiqizwa komshini, amakhemikhali e-petrochemicals, ukuncibilikisa insimbi kanye ne-electronics. Ifaneleka ngokukhethekile ukukhiqizwa kwezingxenye ezingagugi kanye nezingxenye zesakhiwo ezishisa kakhulu. Ukwakhiwa kwezitsha zobumba ze-silicon carbide ceramics ezisabelayo kudlale indima ebalulekile ekuthuthukiseni ukusetshenziswa kwezimboni zalokhu kwaziswa okuhlukahlukene.

Indlela yendabuko yokukhiqizai-reaction-sintered silicon carbide ceramicsukusebenzisa i-silicon carbide powder ehlanganiswe nenani elincane le-carbon powder. Ingxube ihlangabezana nezinga lokushisa eliphezulu le-siliconization ukuze yakhe i-ceramic material eminyene. Nokho, lo msebenzi wezandla wendabuko awunazo izihibe zawo. Inqubo ye-sintering ibonakala isikhathi eside, izinga lokushisa eliphezulu kanye nokusetshenziswa kwamandla aphezulu, okuholela ezindlekweni zokukhiqiza eziphezulu. Njengoba izidingo zemboni zomumo namafomu e-silicon carbide ceramic ziba nzima kakhulu, ukulinganiselwa kwezindlela zendabuko kuya ngokuya kucaca.

Eminyakeni yamuva nje, ukwethulwa kwe-silicon carbide nanopowder sekube yisixazululo esithembisayo sokuthuthukisa izakhiwo zemishini ye-silicon carbide ceramics. Ukusebenzisa ama-nanopowder kungakhiqiza izitsha zobumba ezinokuqina okuphezulu kwe-sintered namandla aphezulu okuguquguquka. Kodwa-ke, izindleko ze-silicon carbide nanopowder ziphezulu uma kuqhathaniswa, ngokuvamile zidlula ama-yuan angu-10,000 ngethani, okubeka isithiyo esikhulu ekwandeni kokutholwa nokukhiqizwa kwezinga elikhulu. Le nselelo yezomnotho idinga ukuhlolwa kwezinye izinto zokusetshenziswa nezindlela zokwenza ukukhiqizwa kwezitsha zobumba ze-silicon carbide kube nokwenzeka futhi kungabizi kakhulu.

Ukwengeza, ikhono lokukhiqiza izimo eziyinkimbinkimbi nezingxenye ezinkulu kuvula izindlela ezintsha ze-silicon carbide ceramic application. Izimboni ezidinga imiklamo eyinkimbinkimbi nezinto ezisebenza kahle zingazuza kule ndlela entsha yokulungiselela. Ukuguquguquka kokuklama namandla okukhiqiza ngobuningi bekhwalithi ephezulu ye-silicon carbide ceramics kungaholela entuthukweni enkulu ezindaweni ezifana ne-aerospace kanye ne-electronics lapho ukusebenza kwempahla kubaluleke kakhulu.