I-porcelain ye-silicon carbide exutywe ne-reaction-sintered inamandla amahle okuxinzelela kubushushu obuphakathi, ukumelana nobushushu kwi-oxidation yomoya, ukumelana nokuguguleka okuhle, ukumelana nobushushu okuhle, i-coefficient encinci yokwandiswa okuthe ngqo, i-coefficient ephezulu yokudlulisa ubushushu, ubunzima obuphezulu, ukumelana nobushushu kunye nokutshabalalisa, ukuthintela umlilo kunye nezinye iimpawu ezikumgangatho ophezulu. Isetyenziswa kakhulu kwizithuthi, ukwenza oomatshini ngokuzenzekelayo, ukhuseleko lokusingqongileyo, ubunjineli beenqwelo moya, izixhobo ze-elektroniki eziqulathe ulwazi, amandla ombane kunye nezinye iindawo, iye yaba yi-ceramics yesakhiwo engabizi kakhulu kwaye engenakutshintshwa kwiindawo ezininzi zoshishino.
Ukusila ngaphandle koxinzelelo kwaziwa njengendlela ethembisayo yokubala i-SiC. Kwiimashini ezahlukeneyo zokuphosa eziqhubekayo, ukusila ngaphandle koxinzelelo kunokwahlulwahlulwa kube yi-calcination yesigaba esiqinileyo kunye ne-calcination yesigaba solwelo esisebenza kakuhle. Ngokongeza i-B kunye ne-C efanelekileyo (umxholo we-oxygen ngaphantsi kwe-2%) kunye kwi-Beta SiC powder entle kakhulu, i-S. Proehazka ifakwa emzimbeni we-SIC calcined onobunzima obungaphezulu kwe-98% ngo-2020, kunye ne-Al2O3 kunye ne-Y2O3 njengezongezo. I-Calcined 0.5m-SiC phantsi kwe-1850-1950 (umphezulu weenxalenye ezine-SiO2 encinci), isiphelo sesokuba ubunzima be-SiC porcelain budlula i-95% yobunzima obusisiseko bethiyori, ubungakanani bengqolowa buncinci, kwaye ubungakanani obuphakathi bukhulu, obuyi-1.5μm.
I-reactive sintering silicon carbide ibhekisa kwinkqubo yonke yokubonakalisa isakhiwo se-billet esine-porous phase okanye i-high performance liquid phase, ukuphucula umgangatho we-billet, ukunciphisa umngxuma womoya, kunye ne-calcining imveliso egqityiweyo ngamandla athile kunye nokuchaneka okulinganayo. I-Plutonium-sic powder kunye ne-graphite ecocekileyo ephezulu zixutywa ngomlinganiselo othile kwaye zifudunyezwe ukuya kuthi ga kwi-1650 ukuvelisa umbungu weenwele. Kwangaxeshanye, ingena okanye ingene kwintsimbi nge-liquid phase Si, ibonakalisa nge-silicon carbide ukwenza i-plutonium-sic, kwaye idibana namasuntswana e-plutonium-sic akhoyo. Emva kokungena kwe-Si, umzimba oxutywe ne-reaction one-density eneenkcukacha kunye nobukhulu obungafakwanga unokufumaneka. Xa kuthelekiswa nezinye iindlela zokuxuba, kwinkqubo yokuxubana kwe-high density reaction, utshintsho lobungakanani be-sintering luncinci, lunokwenza ubungakanani obuchanekileyo bempahla, kodwa kukho i-SiC eninzi emzimbeni oxutywe ne-calcined, iimpawu zobushushu eziphezulu ze-reaction sintered SiC porcelain ziya kuba zimbi. Iiseramikhi zeSiC ezingenaxinzelelo, iiseramikhi zeSiC ezishushu ezi-isostatic kunye neeseramikhi zeSiC ezi-reaction sintered zineempawu ezahlukeneyo.
Abavelisi be-silicon carbide e-reactive sintering: Umzekelo, i-SiC porcelain kwinqanaba le-calcined relative density kunye namandla okugoba, i-hot pressing sintering kunye ne-hot isostatic pressing calcination zininzi, kwaye i-reactive sintering SiC iphantsi kakhulu. Kwangaxeshanye, iipropati zomzimba ze-SiC porcelain ziyatshintsha ngokutshintsha kwe-calcination modifier. I-non-pressure sintering, i-hot press sintering kunye ne-reaction sintering ye-SiC porcelain inokumelana okuhle kwe-alkaline kunye nokumelana ne-asidi, kodwa i-reaction sintered SiC porcelain inokumelana okubuthathaka kwi-HF kunye nezinye i-acid corrosion enamandla kakhulu. Xa ubushushu obuphakathi bungaphantsi kwama-900, amandla okugoba e-SiC porcelain eninzi aphezulu kakhulu kunalawo e-high temperature sintered porcelain, kwaye amandla okugoba e-reactive sintered SiC porcelain ehla kakhulu xa idlula i-1400. (Oku kubangelwa kukwehla ngequbuliso kwamandla okugoba kwenani elithile leglasi elaminethiweyo i-Si ngaphaya kobushushu obuthile emzimbeni o-calcined. Ukusebenza kobushushu obuphezulu be-SiC ceramics ezigobile ngaphandle kwe-pressure calcination kunye noxinzelelo oluqhubekayo olushushu luchaphazeleka kakhulu ziintlobo zezithako.
Ixesha lokuthumela: Novemba-07-2023