Ngenkulungwane yama-21, kunye nophuhliso lwenzululwazi kunye nobuchwepheshe, ulwazi, amandla, izinto, ubunjineli bebhayoloji iye yaba ziintsika ezine zophuhliso lwemveliso yentlalo yanamhlanje, i-silicon carbide ngenxa yeepropati zekhemikhali ezizinzileyo, ukuhanjiswa okuphezulu kwe-thermal, i-coefficient yokwandiswa kwe-thermal. encinci, ingxinano encinci, ukumelana nokunxiba kakuhle, ubunzima obuphezulu, amandla amakhulu omatshini, ukuxhathisa ukubola kweekhemikhali kunye nezinye iimpawu, uphuhliso olukhawulezayo kwintsimi yezinto, Isetyenziswa ngokubanzi kwi-ceramic. iibheringi zebhola, iivalve, izixhobo zesemiconductor, igyro, isixhobo sokulinganisa, i-aerospace kunye namanye amabala.
I-silicon carbide ceramics yaphuhliswa ukususela ngo-1960. Ngaphambili, i-silicon carbide yayisetyenziswa ikakhulu kwizinto zokusila ezisebenza ngoomatshini kunye neerefractories. Amazwe ehlabathini lonke ancamathela ukubaluleka okukhulu kwimizi-mveliso yeeseramics eziphambili, kwaye ngoku akwanelanga nje kuphela ukulungiswa kweeseramics ze-silicon carbide, ukuveliswa kwamashishini e-high-tech ceramics akhula ngokukhawuleza, ngakumbi kumazwe aphuhlileyo. Kwiminyaka yakutshanje, ii-ceramics zamanqanaba amaninzi asekelwe kwi-SIC iiseramics ziye zavela enye emva kwenye, ziphucula ukuqina kunye namandla ezinto eziphathekayo ze-monomer. I-Silicon carbide ephambili kwiinkalo ezine zesicelo, oko kukuthi, iiseramics ezisebenzayo, izinto eziphuculweyo eziphuculweyo, iziqholo kunye nezixhobo zetsimbi.
I-silicon carbide ceramics inokumelana okugqwesileyo kokunxiba
I-silicon carbide ceramics le mveliso ifundwe kwaye yamiselwa. Ukumelana nokunxiba kwe-silicon carbide ceramics le mveliso ilingana namaxesha angama-266 ensimbi ye-manganese, elingana namaxesha angama-1741 entsimbi ephezulu ye-chromium. Ukumelana nokunxiba kuhle kakhulu. Isenokusigcinela imali eninzi. I-silicon carbide ceramics ingasetyenziswa ngokuqhubekayo ngaphezu kweminyaka elishumi.
I-silicon carbide ceramics inamandla amakhulu, ubunzima obuphezulu kunye nobunzima obulula
Njengohlobo olutsha lwezinto, ukusetyenziswa kwe-silicon carbide ceramics lo mandla wemveliso uphezulu kakhulu, ubunzima obuphezulu, ubunzima buye bulula kakhulu, i-silicon carbide ceramics esetyenziswayo, ukufakwa kunye nokutshintshwa koku ngasentla kuya kuba lula ngakumbi.
Udonga lwangaphakathi lwe-silicon carbide ceramic lugudile kwaye aluvimbi umgubo
I-silicon carbide ceramics le mveliso igxothwa emva kobushushu obuphezulu, ngoko ke isakhiwo se-silicon carbide ceramics sixinene, umphezulu ugudile, ubuhle bokusetyenziswa buya kuba buhle ngakumbi, busetyenziswe kwintsapho, ubuhle buya kuba bubuhle.
Ixabiso le-silicon carbide ceramics liphantsi
Iindleko zokwenziwa kweeseramics zesilicon carbide ngokwayo zincinci, ngoko akufuneki ukuba sithenge ixabiso le-silicon carbide ceramics lixabisa kakhulu, ngoko kusapho lwethu, kodwa kunokonga imali eninzi.
Ukusetyenziswa kwe-silicon carbide ceramic:
Ibhola ye-Silicon carbide ceramic
Ibhola ye-Silicon carbide ceramic ineempawu ezibalaseleyo zoomatshini, ukuxhathisa okugqwesileyo kwe-oxidation, ukuxhathisa okuphezulu kwe-abrasion kunye ne-coefficient ephantsi ye-friction. Ibhola le-silicon carbide ceramic ball 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 isagcinwe kwinqanaba eliphezulu le-500 ~ 600MPa, ngoko ubushushu bayo bokusebenza bunokufikelela. 1600 ~ 1700 degrees Celsius.
Izinto ezihlanganisiweyo ze-silicon carbide
I-Silicon carbide matrix composites (i-SiC-CMC) isetyenziswe ngokubanzi kwintsimi ye-aerospace yezakhiwo zabo zokushisa eziphakamileyo ngenxa yokuqina kwayo okuphezulu, amandla aphezulu kunye nokuchasana kwe-oxidation. Inkqubo yokulungiselela i-SiC-CMC ibandakanya i-fiber preforming, unyango lobushushu obuphezulu, i-mesophase coating, i-matrix densification kunye ne-post-treatment. Amandla aphezulu e-carbon fiber anamandla aphezulu kunye nokuqina okulungileyo, kunye nomzimba owenziwe ngaphambili owenziwe ngawo uneempawu ezintle zoomatshini.
Ukwaleka kweMesophase (oko kukuthi, iteknoloji yojongano) bubuchwephesha obuphambili kwinkqubo yokulungiselela, ukulungiswa kweendlela zokwaleka ze-mesophase ziquka i-osmosis yekhemikhali yomphunga (CVI), i-chemical vapor deposition (CVD), indlela ye-sol-sol (Sol-gcl), i-polymer impregnation cracking method (PLP), eyona ifanelekileyo ukulungiselela i-silicon carbide matrix composite yi-CVI indlela kunye nendlela ye-PIP.
Izixhobo zokugquma ubuso zibandakanya i-pyrolytic carbon, i-boron nitride kunye ne-boron carbide, phakathi kwayo i-boron carbide njengohlobo lokumelana ne-oxidation yokugquma ubuso ihlawulwe ngakumbi nangakumbi. I-SiC-CMC, edla ngokusetyenziswa kwiimeko ze-oxidation ixesha elide, ifuna kwakhona unyango lokumelana ne-oxidation, oko kukuthi, umaleko we-silicon carbide eshinyeneyo enobunzima obumalunga ne-100μm ifakwe kumphezulu wemveliso ngenkqubo ye-CVD. ukuphucula ukumelana kwayo ne-oxidation ephezulu yobushushu.
Ixesha lokuposa: Feb-14-2023