Ingcaciso ngokubanzi yeReaction Bonded SiC

Ngokubanziingcaciso yeUkusabelaI-Bonded SiC

I-Reaction Bonded SiC ineempawu zomatshini kunye nokumelana ne-oxidation. Ixabiso layo liphantsi. Kuluntu lwangoku, iye yatsala ingqalelo engakumbi nangakumbi kumashishini ahlukeneyo.

I-SiC yibhondi eyomeleleyo ye-covalent. Kwi-sintering, izinga lokusasazwa liphantsi kakhulu. Kwangaxeshanye, umphezulu wamasuntswana uhlala ugquma umaleko obhityileyo weoksidi odlala indima yesithintelo sokusasaza. I-SiC ecocekileyo ayinakuntywila kwaye idibene ngaphandle kokongeza izongezo. Nokuba inkqubo yokucinezela eshushu isetyenzisiwe, kufuneka kwakhona ikhethe izongezo ezifanelekileyo. Kuphela kumaqondo obushushu aphezulu kakhulu, apho izinto ezifanelekileyo zokuxinana kobunjineli kufutshane noxinaniso lwethiyori zinokufumaneka ekufuneka zibe kuluhlu ukusuka kwi-1950 ℃ ukuya kwi-2200 ℃. Ngelo xesha, ukumila kunye nobukhulu bayo buya kulinganiselwa. Nangona ii-composites ze-SIC zinokufunyanwa ngokubeka umphunga, kukhawulelwe ekulungiseleleni ukuxinana okuphantsi okanye izixhobo zomaleko obhityileyo. Ngenxa yexesha elide lokuzola, iindleko zemveliso ziya kunyuka.

I-Reaction Bonded SiC yasungulwa ngo-1950 nguPopper. Umgaqo osisiseko ngulo:

Ngaphantsi kwesenzo samandla e-capillary, i-silicon elulwelo okanye i-silicon alloy enomsebenzi osebenzayo ingene kwi-porous ceramics equlethe i-carbon kwaye yenze i-carbon silicon kwi-reaction. I-silicon carbide esandula ukwenziwa idityaniswe kumasuntswana e-silicon carbide akwi-situ, kwaye iipores ezishiyekileyo kwisihluzi zizaliswe nge-ejenti yokumitha ukugqiba inkqubo yoxinaniso.

Xa kuthelekiswa nezinye iinkqubo ze-silicon carbide ceramics, inkqubo ye-sintering inezi mpawu zilandelayo:

Iqondo lokushisa eliphantsi, ixesha elifutshane lokucubungula, akukho mfuneko yezixhobo ezikhethekileyo okanye ezibizayo;

I-Reaction Bonded iindawo ezingenawo ukuncipha okanye utshintsho lobungakanani;

Iindlela ezahlukeneyo zokubumba (i-extrusion, isitofu, ukucinezela kunye nokugalela).

Kukho iindlela ezininzi zokubumba. Ngexesha le-sintering, ubungakanani obukhulu kunye neemveliso ezinzima zinokuveliswa ngaphandle koxinzelelo. Itekhnoloji ye-Reaction Bonded ye-silicon carbide ifundwe isiqingatha senkulungwane. Le teknoloji iye yaba yenye yezinto ekugxilwe kuzo kumashishini ahlukeneyo ngenxa yeenzuzo zayo ezizodwa.