UZinzo oluPhezulu nge-Reaction Bonded SiC

Reaction Bonded SiC (RBSC) yimathiriyeli eyomelele kakhulu esetyenziswa kwizicelo ezininzi ngenxa yokumelana kwayo okuphezulu kunye nokuzinza kwe-thermal. Funda ngakumbi ngayo apha!

Imveliso edibeneyo yokusabela iqala ngokuxuba kunye imathiriyeli eyenziwe yiSiC kunye nekhabhoni. Yakuba yenziwe, lo mzimba uluhlaza utyhutyha umatshini oluhlaza ukuchaneka kunye nokugqitywa komphezulu.

Nxiba ukuxhathisa

I-Silicon carbide ivelele njengomnye wabadlali abaphezulu xa kuziwa ekuxhathiseni ukunxiba, ngenxa yenkqubo yokuvelisa ethembekileyo ebangela ukuba kube nzima, iilinen eziqinileyo ezikwaziyo ukunxitywa ezibonakalise ukubaluleka kwazo kwindawo ezibangwayo zemizi-mveliso.

I-Reactive Bonded Stainless Steel Composite (RBSC), idalwe ngenkqubo entsha yokudibanisa yokusabela apho isilicon etyhidiweyo ingene kwiporous carbon preform., ivumela i-RBSC ukuba igcine imilo yayo kumaqondo obushushu aphezulu ngelixa isavakala kwaye ixhathisa kwi-corrosion ye-acids.. Ngaphezulu, izinga lokwandiswa kwe-thermal liphantsi kakhulu kwaye ukuxhathisa komhlwa kubonakalisiwe.

I-SiC yaziwa ngokubanzi ngobulukhuni bayo, ukumelana nokunxiba, ubushushu kunye nokhukuliseko lweekhemikhali njengento esetyenziselwa ukutywinwa koomatshini kunye nezixhobo zempompo eziphezulu zokusebenza. Kuxhomekeke kwibakala layo, I-SiC ikwanazo namandla abalaseleyo okuguquguquka kumaqondo obushushu obuphezulu bokusebenzisa kunye nokomelela okulungileyo – Iimpawu eziyenza ilungele usetyenziso apho ukungcangcazela nokothuka kunokwenzeka.

Ukunyangwa kweThermal

Ukumelana nokushisa okuphezulu kwe-RBSC kwenza ukuba ibe yinkokeli ekufuneni izicelo zoshishino, ukukhupha ubushushu ngokufanelekileyo ukuvumela ukusetyenziswa kwayo kwiindawo ezishushu ngaphandle kweemfuno ezongezelelweyo zokunciphisa ixesha kunye nokugcinwa.

Impendulo ye-bodd silicon carbide (RBSC) iveliswa ngokungena ngaphakathi kwimixube eyenziwe yimixube yeSiC kunye nekhabhoni enesilicon elulwelo, apho ukusabela kwayo kunye nesiphumo se-carbon kwi-silicon eyongezelelekileyo eyenziwayo edibanisa amaqhekeza okuqala e-SiC kunye – ngokungafaniyo ne-Sintered SiC eveliswa ngenkqubo ye-ceramic yesiqhelo yokwenziwa kusetyenziswa i-non-oxide sintering aids.

Uphando lweNgoma lucebisa ukuba ukufakwa kwangaphambili kwe-composite kwandisa umxholo we-SiC ngokulawula ukusabela phakathi kwe-silicon engamanzi kunye ne-amorphous carbon., ukuphelisa i-pore-clogging phenomena, kunye nokuvelisa i-RB-SiC eshinyeneyo enemodyuli ephezulu kunye namandla – ukuvelisa i-RBSC eshinyeneyo kunye nendibaniselwano ekhethekileyo yamandla olwakhiwo, ukumelana neekhemikhali, ukunyamezela ubushushu kunye nokumelana nokunxiba – ukwenza i-RBSC ibe yimathiriyeli yangomso. Ngaphezulu, esi sixhobo sinqandayo sinokuqina okumangalisayo kwiindawo zokunxiba eziphezulu kunye nokumelana nokhukuliseko oluphezulu kunye nokuzinza kobushushu bobushushu. – ukwenza i-RBSC ibe yimathiriyeli yangomso.

Ukuxhathisa iikhemikhali

I-Reaction Bonded SiC yimathiriyeli yeseramikhi eyomeleleyo kwaye eyomelela, eyaziwa ngokuba yikhemikhali inert kwaye imelana ne-oxidation kunye nokuhlwa. Iyakwazi ukumelana namaqondo obushushu aphezulu ngelixa ihleli yomelele, I-Reaction Bonded SiC yenza amacandelo afanelekileyo kwiindawo zoshishino njengeempompo, imilomo, iibheringi, ukuqukuqela kokulawula ukuqukuqela kunye nokunye.

Ukwenziwa kwe-RB SiC kubandakanya ukutofa i-silicon elulwelo kwi-porous carbon material epakishwe kwimo yayo yokugqibela kusetyenziswa ukungeniswa okunyibilikayo okusebenzayo. (RMI). Le nkqubo iqinisekisa intsalela encinci ye-carbon clogs pores, kwaye ivumela i-silicon etyhidiweyo ukuba isebenze kunye nekhabhoni ukwenza i-silicon carbide [1, 2].

I-silicon carbide ene-reaction-bounded inika ukuhanjiswa kwe-thermal ekhethekileyo, i-coefficient ephantsi yokwandisa, kunye nokuxhathisa ukothuka kwe-thermal, i-oxidation kunye nokubola; iyenza ibe lolona khetho lubalaseleyo lwezixhobo zokusetyenzwa kwe-semiconductor ezifana neeshelufu ze-kiln kunye nefenitshala okanye izitya. Ngaphezulu, iipropathi zayo ezikhaphukhaphu kunye namandla ziyenza ibe luncedo kumkhosi okanye kwizixhobo ze-aerospace ezifana neepleyiti zesikrweqe okanye imilomo yerokethi..

Ukunyangwa kweThermal Shock

Ukuxhatshazwa kwe-thermal shock of materials kunokulinganiswa ngokukwazi kwabo ukunyamezela uxinzelelo phantsi kokutshintsha kweqondo lokushisa ngokukhawuleza, kuxhomekeke kwisakhiwo sabo, iipropati kunye nokusingqongileyo. Uxinezeleko olunjalo lunokubangela iintanda, ukonakala okanye ukwaphuka ngaphakathi kwezakhiwo zabo, iipropati okanye imo engqongileyo – ukwenza imiba enokubakho yokuqhekeka umzekelo.

I-Reaction Bonded Silicon Carbide ibonakalisa ubume obuntsonkothileyo belattice yeebhondi phakathi kwekhabhoni kunye neeathom zesilicon ezibonelela ngamandla abalulekileyo oomatshini., high conductivity thermal kunye noxinzelelo oluphantsi – iimpawu ezinegalelo ekuxhathiseni ukothuka kwe-thermal.

Ukuxhatshazwa kwe-thermal shock yezinto kuxhomekeke kwizinto ezininzi, kubandakanywa izinga lokuqala lokuqhekeka kunye nesantya sokusasaza, ubude bokuqhekeka kunye neemeko zokuqalisa kwayo. Isixhobo se-RBSC sinamandla okugcina amanani aphezulu oxinzelelo lokuqhekeka ngelixa uxhathisa iindlela ezahlukeneyo zomonakalo – ukusuka kwiintanda zematrix ezenza ngaphakathi kweepores phakathi kweebhandle zefayibha ukuya kwiintanda zeradial ecaleni kweendonga zepore – ngaphandle kokubandezeleka okukhulu okanye ukwakheka kweentanda.