A fannin kimiyyar kayan aiki, yumburan silicon carbide sun zama "ƙaunatacce" na fannoni da yawa na fasaha saboda kyawawan halayensu kamar ƙarfin tauri, ƙarfi mai yawa, kwanciyar hankali mai kyau na zafi, da kwanciyar hankali na sinadarai. Daga sararin samaniya zuwa masana'antar semiconductor, daga sabbin motocin makamashi zuwa injunan masana'antu, yumburan silicon carbide suna taka muhimmiyar rawa. A cikin tsarin shirya yumburan silicon carbide, hanyar sintering ita ce babban abin da ke ƙayyade halayenta da kewayon aikace-aikacenta. A yau, za mu zurfafa cikin tsarin sintering na silicon carbide kuma mu mai da hankali kan bincika fa'idodin musamman na sintered reaction sinteredkayan yumbu na silicon carbide.
Hanyoyin da aka saba amfani da su wajen yin simintin silicon carbide
Akwai hanyoyi daban-daban na yin sintering na silicon carbide, kowannensu yana da ƙa'idodi da halaye na musamman.
1. Yin amfani da siminti mai zafi: Wannan hanyar yin siminti ta ƙunshi sanya foda silicon carbide a cikin mold, a shafa wani matsin lamba yayin dumamawa, don kammala ayyukan gyaran da siminti a lokaci guda. Yin amfani da siminti mai zafi na iya samun yumbu mai yawa na silicon carbide a yanayin zafi mai ƙarancin zafi da kuma cikin ɗan gajeren lokaci, tare da girman hatsi mai kyau da kyawawan halayen injiniya. Duk da haka, kayan aikin siminti mai zafi suna da rikitarwa, farashin siminti yana da yawa, buƙatun tsarin samarwa suna da tsauri, kuma sassa masu siffa ne kawai za a iya shirya su, wanda ke haifar da ƙarancin ingancin samarwa, wanda a wani ɓangare yana iyakance amfaninsa ga babban sikelin.
2. Tsarin rage matsin lamba a yanayi: Tsarin rage matsin lamba a yanayi shine tsarin rage yawan sinadarin silicon carbide ta hanyar dumama shi zuwa 2000-2150 ℃ a ƙarƙashin matsin lamba a yanayi da yanayin da ba ya aiki, ta hanyar ƙara kayan taimako na rage matsin lamba. An raba shi zuwa matakai biyu: tsarin rage matsin lamba a yanayi da kuma tsarin rage matsin lamba a yanayi. Tsarin rage matsin lamba a lokaci mai ƙarfi zai iya samun yawan sinadarin silicon carbide mai yawa, ba tare da wani tsari na gilashi tsakanin lu'ulu'u ba, da kuma kyawawan halaye na injiniya masu zafi; Tsarin rage matsin lamba a lokaci mai ƙarfi yana da fa'idodin ƙananan zafin jiki na rage ƙarfin sintering, ƙaramin girman hatsi, da ingantaccen ƙarfin lanƙwasa kayan aiki da taurin karyewa. Tsarin rage matsin lamba a yanayi ba shi da wani ƙuntatawa akan siffar da girman samfurin, ƙarancin farashin samarwa, da kuma kyawawan halaye na kayan aiki masu kyau, amma yanayin zafin sintering yana da yawa kuma yawan amfani da makamashi yana da yawa.
3. Yin amfani da sinadarin sintering: P. Popper ne ya fara gabatar da sinadarin sintered silicon carbide a shekarun 1950. Tsarin ya kunshi hada sinadarin carbon da garin silicon carbide, da kuma shirya jikin kore ta hanyoyi kamar allurar ƙera, busasshiyar matsewa, ko kuma matsewar isostatic mai sanyi. Sannan, ana dumama billet din zuwa sama da digiri 1500 a karkashin yanayi na injin ko mara aiki, a lokacin ne silicon din mai karfi zai narke ya zama silicon na ruwa, wanda zai shiga cikin ramukan da ke dauke da billet din ta hanyar aikin capillary. Ruwan silicon ko tururin silicon yana fuskantar wani sinadari tare da C a jikin kore, kuma β-SiC da aka samar a cikin wurin yana hadewa da asalin barbashin SiC a jikin kore don samar da kayan yumbu na silicon carbide mai sintered silicon.
Fa'idodin Ceramics na Reaction Sintering Silicon Carbide
Idan aka kwatanta da sauran hanyoyin yin sintering, yumburan silicon carbide masu sintered suna da fa'idodi masu yawa:
1. Ƙananan zafin sintering da farashin da za a iya sarrafawa: Zafin sintering na sintering yawanci yana ƙasa da zafin sintering na yanayi, yana rage yawan amfani da makamashi da buƙatun aikin sintering mai yawa. Ƙananan zafin sintering yana nufin ƙarancin farashin kulawa ga kayan aiki da rage yawan amfani da makamashi yayin aikin samarwa, wanda hakan ke rage farashin samarwa yadda ya kamata. Wannan yana sa sintering na sintering silicon carbide yana da fa'idodi masu mahimmanci a fannin tattalin arziki a cikin manyan samarwa.
2. Tsarin kusan girman da aka yi da net, ya dace da tsari mai rikitarwa: A lokacin aikin tacewa da reactions sintering, kayan ba sa fuskantar raguwar girma. Wannan halayyar ta sa ya dace musamman don shirya manyan sassan tsarin da suka ƙunshi sifofi masu rikitarwa. Ko dai daidaitattun sassan injina ne ko manyan sassan kayan aikin masana'antu, yumburan silicon carbide na reactions sintered na iya cika buƙatun ƙira daidai, rage matakan sarrafawa na gaba, inganta ingancin samarwa, da kuma rage asarar kayan aiki da ƙaruwar farashi da sarrafawa ke haifarwa.
3. Babban matakin yawan abu: Ta hanyar sarrafa yanayin amsawar da kyau, yin simintin amsawa na iya cimma babban matakin yawan yumburan silicon carbide. Tsarin mai yawa yana ba kayan kayan kyawawan halaye na injiniya, kamar ƙarfin lanƙwasawa mai yawa da ƙarfin matsewa, wanda ke ba shi damar kiyaye amincin tsari a ƙarƙashin manyan ƙarfin waje. A lokaci guda, tsarin mai yawa yana ƙara juriyar lalacewa da juriyar tsatsa na kayan, yana ba shi damar aiki cikin kwanciyar hankali a cikin mawuyacin yanayi na aiki da kuma tsawaita tsawon rayuwarsa.
4. Kyakkyawan kwanciyar hankali na sinadarai: Tukwanen simintin ...
Yadu a aikace a fannoni daban-daban
Da waɗannan fa'idodin, an yi amfani da yumburan silicon carbide masu sintered a fannoni da yawa. A fannin kayan aikin murhu mai zafi, yana iya jure yanayin zafi mai yawa kuma yana tabbatar da ingantaccen aikin murhu; A cikin masu musayar zafi, kyakkyawan tasirin zafi da juriyar tsatsa sun sanya su zama zaɓi mafi kyau na kayan aiki; A cikin kayan aikin kare muhalli kamar bututun cire sulfurization, yana iya tsayayya da lalata hanyoyin sadarwa masu lalata da kuma tabbatar da dorewar aikin kayan aiki na dogon lokaci. Bugu da ƙari, yumburan silicon carbide masu sintered suma suna taka muhimmiyar rawa a fannoni masu ƙarfi kamar photovoltaics da sararin samaniya.
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Lokacin Saƙo: Yuni-13-2025