Kwinkulungwane yama-21, ngophuhliso lwesayensi netekhnoloji, ulwazi, amandla, izixhobo, ubunjineli bebhayoloji bube ziintsika ezine zophuhliso lwemveliso yoluntu yanamhlanje, i-silicon carbide ngenxa yeempawu zeekhemikhali ezizinzileyo, ukuqhuba okuphezulu kobushushu, i-coefficient yokwandiswa kobushushu encinci, encinci, ukumelana nokuguguleka okuhle, ubunzima obuphezulu, amandla aphezulu oomatshini, ukumelana nokugqwala kweekhemikhali kunye nezinye iimpawu, uphuhliso olukhawulezayo kwicandelo lezixhobo, Isetyenziswa kakhulu kwiibheringi zebhola ze-ceramic, iivalvu, izixhobo ze-semiconductor, i-gyro, isixhobo sokulinganisa, i-aerospace kunye nezinye iindawo.
Iiceramics zeSilicon carbide ziye zaphuhliswa ukususela ngeminyaka yoo-1960. Ngaphambili, iSilicon carbide yayisetyenziswa kakhulu kwizinto zokugaya ngoomatshini kunye nezinto zokurhawuzelela. Amazwe kwihlabathi liphela abeka ukubaluleka okukhulu kuphuhliso lwezeceramics eziphambili, kwaye ngoku akwaneliswa kuphela kukulungiswa kweeceramics zemveli zeSilicon carbide, ukuveliswa kweenkampani zeceramics zobugcisa obuphezulu kukhula ngokukhawuleza, ingakumbi kumazwe aphuhlileyo. Kwiminyaka yakutshanje, iiceramics zesigaba ezininzi ezisekelwe kwiiceramics zeSIC ziye zavela enye emva kwenye, ziphucula ukuqina kunye namandla ezinto ze-monomer. ISilicon carbide imimandla emine ephambili yesicelo, oko kukuthi, iiceramics ezisebenzayo, izinto zokurhawuzelela eziphambili, izinto zokurhawuzelela kunye nezinto ezikrwada ze-metallurgical.
Iiceramics zeSilicon Carbide zinokumelana okuhle kakhulu nokuguguleka
Iiceramics zeSilicon carbide le mveliso ifundwe kwaye yafunyanwa. Ukumelana nokuguguleka kweeceramics zeSilicon carbide le mveliso ilingana nentsimbi yeManganese ephindwe ka-266, ilingana nentsimbi yeChromium ephezulu ephindwe ka-1741. Ukumelana nokuguguleka kulungile kakhulu. Isenokusonga imali eninzi. Iiceramics zeSilicon carbide zingasetyenziswa rhoqo kangangeminyaka engaphezu kweshumi.
Iiceramics zeSilicon carbide zinamandla aphezulu, ubunzima obuphezulu kunye nobunzima obulula
Njengohlobo olutsha lwezinto, ukusetyenziswa kwee-silicon carbide ceramics le mveliso inamandla aphezulu kakhulu, ubunzima obuphezulu, ubunzima bukwalula kakhulu, ii-silicon carbide ceramics ezinjalo ezisetyenziswayo, ezifakelwayo kunye nezitshintshwayo zezi zingasentla ziya kuba lula ngakumbi.
Udonga olungaphakathi lwe-silicon carbide ceramic lugudileyo kwaye aluvimbi umgubo
Iiceramics ze-silicon carbide le mveliso itshiswa emva kobushushu obuphezulu, ngoko ke ulwakhiwo lweeceramics ze-silicon carbide luxineneyo, umphezulu uthambile, ubuhle bokusetyenziswa buya kuba buhle ngakumbi, ngoko ke xa zisetyenziswa kusapho, ubuhle buya kuba buhle ngakumbi.
Ixabiso le-silicon carbide ceramics liphantsi
Ixabiso lokwenza ii-silicon carbide ceramics ngokwazo liphantsi kakhulu, ngoko ke akufuneki sithenge ixabiso le-silicon carbide ceramics, ngoko ke kusapho lwethu, kodwa nako kunokonga imali eninzi.
Isicelo se-silicon carbide ceramic:
Ibhola ye-ceramic ye-silicon carbide
Ibhola ye-ceramic ye-silicon carbide ineempawu ezibalaseleyo zoomatshini, ukumelana okuhle kakhulu ne-oxidation, ukumelana okuphezulu kokukrala kunye ne-coefficient ephantsi yokungqubana. Ibhola ye-ceramic ye-silicon carbide amandla aphezulu obushushu, izinto eziqhelekileyo ze-ceramic kwi-1200 ~ 1400 degrees Celsius amandla aya kuncitshiswa kakhulu, kwaye i-silicon carbide kwi-1400 degrees Celsius amandla okugoba asagcinwa kwinqanaba eliphezulu le-500 ~ 600MPa, ngoko ke ubushushu bayo bokusebenza bunokufikelela kwi-1600 ~ 1700 degrees Celsius.
Izinto ezidityanisiweyo ze-silicon carbide
Ii-silicon carbide matrix composites (SiC-CMC) zisetyenziswa kakhulu kwicandelo leenqwelo-moya ngenxa yezakhiwo zazo zobushushu obuphezulu ngenxa yokuqina kwazo okuphezulu, amandla aphezulu kunye nokumelana okuhle kwe-oxidation. Inkqubo yokulungiselela i-SiC-CMC ibandakanya ukufakelwa kwefayibha, unyango lobushushu obuphezulu, i-mesophase coating, i-matrix densification kunye nonyango emva koko. Ifayibha yekhabhoni enamandla aphezulu inamandla aphezulu kunye nokuqina okuhle, kwaye umzimba owenziwe ngawo uneempawu ezintle zoomatshini.
I-Mesophase coating (oko kukuthi, iteknoloji ye-interface) yeyona teknoloji iphambili kwinkqubo yokulungiselela, ukulungiswa kweendlela ze-mesophase coating ziquka i-chemical vapor osmosis (CVI), i-chemical vapor deposition (CVD), indlela ye-sol-sol (Sol-gcl), indlela ye-polymer impregnation cracking (PLP), eyona ifanelekileyo ekulungiseleleni i-silicon carbide matrix composites yi-CVI method kunye ne-PIP method.
Izixhobo zokugquma ezidibanisa ubuso ziquka i-pyrolytic carbon, i-boron nitride kunye ne-boron carbide, phakathi kwazo i-boron carbide njengohlobo lokuxhathisa i-oxidation, ukugquma okudibanisa ubuso kuye kwanikwa ingqalelo engakumbi. I-SiC-CMC, edla ngokusetyenziswa kwiimeko zokugquma ixesha elide, ikwafuna unyango lokuxhathisa i-oxidation, oko kukuthi, umaleko we-silicon carbide exineneyo enobukhulu obumalunga ne-100μm ubekwa phezu komphezulu wemveliso ngenkqubo ye-CVD ukuphucula ukuxhathisa kwayo i-oxidation kumaqondo obushushu aphezulu.
Ixesha lokuthumela: Februwari-14-2023