Sahaminta sifooyinka dhoobada silikoon carbide ee daloolka leh

Tilmaamaha gaarka ah ee daloolka dhoobada silikoon carbideinta badan waxaa sabab u ah qaab-dhismeedkeeda dalool gaar ah, kaas oo ka kooban porosity, cabbirka daloolka iyo qaybinta, iyo qaabka godadka. Sidaa darteed, waxaa lagama maarmaan ah in la xakameeyo qulqulkeeda, xajmiga daloolka iyo qaybinta, iyo qaabka daloolada iyada oo loo marayo habka diyaarinta si loo helo qaab-dhismeedka dalool ee la rabo. Haddaba habka diyaarintiisa ayaa ahaa diiradda cilmi-baarista.

Guryaha dhoobada SiC-da daloola

1.Guryaha daloolka

①Porosity

Porosity waa boqolleyda mugga ay ku jiraan daldaloolada ku jira shay dalool ah ilaa wadarta guud ee walaxda daloolsan (oo ay ku jiraan daloolo furan, daloolno kala badh furan iyo daloolno xiran oo 3 nooc ah). Cilmi-baaristu waxay muujinaysaa in waxqabadka alaabta daloolku ay inta badan ku xiran tahay porosity-ga.

② morphology-ga daloolka

Mofoloji daloolku waxa uu tilmaamayaa qaab-dhismeedka daldaloolada ee dhoobada daloolka ah. Marka daloolada ay yihiin daloolo siman, waxqabadka guud ee maaddadu waa isotropic; laakiin marka daloolada ay yihiin xariijimo ama fidsan, sida iyada oo loo marayo carbonization alwaax ay diyaarisay falcelinta silikoon sintering dalool dhoobada SiC, qaab dhismeedka daldalooli waa jihada gaar ah.

③Dhexroor daloolka iyo qaybinta

Dhexroor dalool oo ka yar 2nm oo loogu talagalay walxaha microporous, cabbirka daloolka u dhexeeya 2 ~ 50nm ee alaabta mesoporous, cabbirka ka weyn 20nm alaabta makroporous. Marka la eego cabbirka daloolka iyo qaybinta saamaynta weyn ee waxqabadka, oo ay ku jiraan qulqulitaan, heerka qulqulka iyo waxqabadka sifaynta.

2.Guryaha makaanikada

dhoobada SiC ee daloolaalaabtu waa jajaban tahay oo sifooyinkooda makaanikada waxaa badanaa lagu gartaa foorarsi ama xoog cadaadis. Porosity iyo habka diyaarinta ayaa saameyn weyn ku leh sifooyinka farsamada ee dhoobada SiC

3.Habdhaqanka kulaylka

Porosity iyo qaab-dhismeedka daloolku waxay saameyn weyn ku leeyihiin dhaqdhaqaaqa kulaylka ee dhoobada daloolka leh. Ceramics-ka daloola ee leh qaybinta daldaloolada isku midka ah, kuleylka kulaylka ayaa si tartiib tartiib ah hoos ugu dhacaya marka heerka daloolku uu kordho. Si kastaba ha noqotee, iyada oo ay ugu wacan tahay qaab-dhismeedka daloolada ee alaabta dhoobada leh ee ay diyaariyeen habab kala duwan, waxaa jira kala duwanaansho weyn, sidaas darteed habka wareejinta kulaylku waa mid isku mid ah oo isbeddel ah oo adag.

dhoobada SiC-da daloolaWaxay leeyihiin sifooyinka jireed ee ugu fiican ee SiC lafteeda, sida cufnaanta sare ee sare, aagga dusha sare ee gaarka ah, engegnaanta sare, iska caabinta daxalka, iska caabinta heerkulka sare, kulaylka sare ee kuleylka, iskudhafka hoose ee ballaarinta kulaylka, iyo iska caabinta shoogga kulaylka, korka ku qanacsanaanta dabeecadda dalool ee dhoobada.