Saamaynta daaweynta cryogenic ee qaab-dhismeed-yar ee carbide sibidhka

Nidaamyada cryogenic ee kala duwan waxay keenaan isbeddel ku yimaada sifooyinkacarbide sibidhka ah, iyo isbeddelada guryaha waxay si dhow ula xiriiraan horumarka qaab-dhismeedkiisa yar.Sidaa darteed, waxaa lagama maarmaan ah in la sii falanqeeyo saameynta daaweynta cryogenic ee qaab-dhismeedka yar-yar ee carbide sibidhka.

Qaab-dhismeedka yar yar ee carbide sibidhka ee WC-Co waa sida soo socota: waji - WC (wejiga adag);β wajiga - Co (wejiga binder);y wejiga - (TaC, TiC, NbC, WC) carbides isku dhafan oo siman oo siman;eta wejiga-decarburized (CoW, C, Co.W.C).Gill iyo al.wuxuu bixiyay jaantuska jaantuska wejiyada a iyo β, sida ku cad sawirka 6. Waxaa ka mid ah, α wajiga-WC (wejiga adag) ayaa ku jira qaybta ugu weynwalxaha carbide sibidhkaqaabka qalfoofka adag, halka β-phase-Co (wejiga binder) uu si dhow ugu xiran yahay tungsten carbide (WC) sida shabag.

Marka carbide sibidhka la qaboojiyo ka dib marka la isku daro, maadaama xaddi badan oo W iyo C ay ku milmeen Co, heerka kulaylka sare ee α-Co heerkulka qolka ayaa weli u jira si deggan.Marka heerkulku sii socdo hoos u dhaca, isbeddelka marxaladda martensitic ee ka imanaya cubic cubic α-Co ilaa saddex geesood oo xidhxidhan ε-Co waxay ku dhacdaa marxaladda isku xidhka -Co.Waxaa la arki karaa in marka heerkulku isbeddelo, waxaa jira isbeddel ku yimaada qaab-dhismeedka yar yar eecarbide sibidhka ah, kaas oo bixiya suurtogalnimada daaweynta cryogenic si kor loogu qaado isbeddelka wajigacarbide sibidhka ah.Daraasado badan ayaa diiradda saaray isbeddelada qaab-dhismeedka yar yar eecarbide sibidhka ahka hor iyo ka dib daaweynta cryogenic iyo sahamiyey habka kobaca microscopic marka sifooyinka macroscopic isbedel.