Babban bayani na Reaction Bonded SiC

Gabaɗayabayani akanMartaniFarashin SiC

Reaction Bonded SiC yana da kaddarorin inji da juriya na iskar shaka. Farashin sa yana da ƙananan ƙananan. A cikin al'umma ta yanzu, ya fi jan hankalin mutane a masana'antu daban-daban.

SiC shine haɗin gwiwa mai ƙarfi mai ƙarfi. A cikin sintering, ƙimar watsawa yana da ƙasa sosai. A lokaci guda, saman barbashi sau da yawa yana rufe wani ɗan ƙaramin oxide na bakin ciki wanda ke taka rawar shingen watsawa. SiC mai tsafta ba ta da ƙarfi kuma ba ta da ƙarfi ba tare da ƙari ba. Ko da an yi amfani da tsari mai zafi, dole ne kuma ya zaɓi abubuwan da suka dace. Sai kawai a sosai high yanayin zafi, za a iya kayan dace da aikin injiniya yawa kusa da theoretical yawa za a samu wanda ya kamata a cikin kewayon daga 1950 ℃ zuwa 2200 ℃. A lokaci guda, da siffar da girman za a iyakance. Ko da yake ana iya samun abubuwan haɗin SIC ta hanyar ajiyar tururi, an iyakance shi ga shirya ƙarancin ƙima ko kayan sirara. Saboda dogon lokacin shiru, farashin samarwa zai karu.

An ƙirƙira Reaction Bonded SiC a cikin 1950 ta Popper. Babban ƙa'idar ita ce:

Ƙarƙashin aikin ƙarfin capillary, siliki na ruwa ko siliki tare da aiki mai amsawa sun shiga cikin yumbu mai ƙyalli mai ɗauke da carbon kuma ya haifar da silikon carbon a cikin amsa. Sabuwar siliki carbide da aka kirkira tana haɗe da ainihin abubuwan siliki carbide na asali a wurin, kuma ragowar pores a cikin filler suna cike da wakili mai ɓarna don kammala aikin haɓakawa.

Idan aka kwatanta da sauran matakai na silicon carbide yumbura, tsarin sintering yana da halaye masu zuwa:

Ƙananan zafin jiki na aiki, ɗan gajeren lokacin aiki, babu buƙatar kayan aiki na musamman ko tsada;

Reaction Abubuwan da aka haɗa ba tare da raguwa ko canjin girma ba;

Hanyoyin gyare-gyare daban-daban (extrusion, allura, latsawa da zuba).

Akwai ƙarin hanyoyin yin siffa. A lokacin sintering, za a iya samar da manyan girma da samfurori masu rikitarwa ba tare da matsawa ba. An yi nazarin fasahar haɗin kai na Reaction na silicon carbide tsawon rabin karni. Wannan fasaha ta zama ɗaya daga cikin abubuwan da masana'antu daban-daban suka fi mayar da hankali saboda fa'idodinta na musamman.