I-silicon carbide ekhupha i-reaction sintering yindlela yokulungiselela izixhobo ze-ceramic ezisebenza kakuhle. Iphendula kwaye icinezele umgubo we-silicon carbide kunye nezinye iikhemikhali phantsi kweemeko zobushushu obuphezulu ukuze ivelise uxinano oluphezulu, ubunzima obuphezulu, ukumelana nokuguguleka okuphezulu kunye nezixhobo ezimelana nokugqwala okuphezulu.
1. Indlela yokulungiselela. Inkqubo yokulungiselela i-reactive sintering silicon carbide idla ngokuquka amanyathelo amabini: reaction kunye ne-sintering. Kwinqanaba lokuphendula, i-silicon carbide powder isabela kunye nezinye iikhemikhali kumaqondo obushushu aphezulu ukuze zenze iikhompawundi ezinamaqondo okunyibilika aphantsi, njenge-alumina, i-boron nitride kunye ne-calcium carbonate. Ezi khompawundi zinokusebenza njengezihlanganisi kunye nezizalisi ukunceda ukwandisa amandla okubopha kunye nokugeleza kwe-silicon carbide powders ngelixa zinciphisa ii-pores kunye neziphene kwizinto. Kwinqanaba lokutshisa, imveliso yokusabela iyatshiswa kumaqondo obushushu aphezulu ukuze yenze izinto ze-ceramic ezixineneyo. Izinto ezifana nobushushu, uxinzelelo kunye nomoya okhuselayo kufuneka zilawulwe kwinkqubo yokutshisa ukuqinisekisa ukuba izinto zisebenza kakuhle. Izinto ze-silicon carbide ceramic ezifunyenweyo zineempawu zobulukhuni obuphezulu, amandla aphezulu, ukumelana nokugqwala okuphezulu kunye nokumelana nokuguguleka okuphezulu.
2. Iipropati. I-silicon carbide exutywe ne-reaction-sintered ineempawu ezininzi ezintle, nto leyo eyenza ukuba isetyenziswe kakhulu kwiindawo ezininzi. Okokuqala, izinto ze-silicon carbide ceramic zinobunzima obuphezulu kakhulu kwaye zinokusika nezinto eziqinileyo ezifana nentsimbi. Okwesibini, izinto ze-silicon carbide ceramic zinokumelana okuhle nokuguguleka kwaye zingasetyenziswa ixesha elide phantsi kweemeko ezinzima ezifana nobushushu obuphezulu kunye noxinzelelo oluphezulu. Ukongeza, izinto ze-silicon carbide ceramic zinokumelana nokugqwala okuphezulu kunye nozinzo oluphezulu lobushushu, kwaye zingasetyenziswa ixesha elide kwiindawo ezigqwala kunye nobushushu obuphezulu.
3. Iindawo zokusetyenziswa. I-reaction-sintered silicon carbide isetyenziswa kwiindawo ezininzi. Umzekelo, kwishishini lokuvelisa, izixhobo ze-silicon carbide ceramic zisetyenziswa kakhulu kwi-abrasives, izixhobo zokusika kunye neendawo zokuguguleka. Ubunzima bayo obuphezulu kunye nokumelana nokuguguleka kwenza ukuba ibe luncedo ekusikeni, ekusikeni nasekusileni
Zilungele ukupolisha nezinye iindawo. Kwishishini leekhemikhali, izixhobo zeseramikhi zesilicon carbide zingasetyenziselwa ukuvelisa iikhemikhali ezifana ne-sulfuric acid kunye nee-asidi ezinamandla ezifana ne-hydrofluoric acid ngenxa yokumelana kwazo nokugqwala okuphezulu kunye nokuzinza kobushushu obuphezulu. Kwicandelo leenqwelo-moya kunye nokhuselo, izixhobo zeseramikhi zesilicon carbide zingasetyenziselwa ukwenza ii-missile casings kunye nezixhobo zokukhusela ubushushu kwiinqwelo-moya ezikhawulezayo. Ukongeza, izixhobo zeseramikhi zesilicon carbide zingasetyenziswa nakwicandelo le-biomedical lamalungu okwenziwa kunye nezixhobo zotyando lwamathambo, kuba zihambelana kakuhle ne-bio kunye nokumelana nokuguguleka.
I-silicon carbide ekhupha i-reaction sintering yindlela yokulungiselela izixhobo ze-ceramic ezisebenza kakuhle. Iphendula kwaye icinezele umgubo we-silicon carbide kunye nezinye iikhemikhali phantsi kweemeko zobushushu obuphezulu ukuvelisa uxinano oluphezulu, ubulukhuni obuphezulu, ukumelana nokuguguleka okuphezulu kunye nezixhobo ezimelana nokugqwala okuphezulu. Izixhobo ze-silicon carbide ceramic zineempawu ezilungileyo, ezinje ngobunzima obuphezulu, ukumelana nokuguguleka okuphezulu, ukumelana nokugqwala okuphezulu kunye nokuzinza kobushushu obuphezulu, ngoko ke isetyenziswa kakhulu kwiindawo ezininzi ezifana nokuvelisa, ishishini leekhemikhali, aerospace kunye neendawo zokhuselo kunye neendawo ze-biomedical.
Ixesha lokuthumela: Julayi-08-2023