Silicon carbide yumburagyare-gyaren tsari kwatanta: sintering tsari da abũbuwan amfãni da rashin amfani
A cikin samar da silicon carbide yumbura, kafa shine kawai hanyar haɗin gwiwa a cikin duka tsari. Sintering shine ainihin tsari wanda ke shafar aikin ƙarshe da aikin yumbu. Akwai hanyoyi daban-daban na sintering silicon carbide yumbura, kowanne da nasa amfani da rashin amfani. A cikin wannan gidan yanar gizon, za mu bincika tsarin sintering na silicon carbide ceramics da kwatanta hanyoyi daban-daban.
1. Rashin amsawa:
Reaction sintering sanannen fasaha ce ta ƙirƙira don yumbun silikon carbide. Wannan tsari ne mai sauƙi kuma mai tsada kusa da tsari mai girman kai. Sintering yana samuwa ta hanyar silicidation dauki a ƙananan zafin jiki na 1450 ~ 1600 ° C da ɗan gajeren lokaci. Wannan hanya na iya samar da sassa na girman girman da siffa mai rikitarwa. Duk da haka, shi ma yana da rashin amfani. A siliconizing dauki babu makawa take kaiwa zuwa 8% ~ 12% free silicon a silicon carbide, wanda rage ta high-zazzabi inji Properties, lalata juriya, da hadawan abu da iskar shaka juriya. Kuma zafin amfani yana iyakance ƙasa da 1350 ° C.
2. Matsa zafi mai zafi:
Zafafan latsawa wata hanya ce ta gama gari don siyar da yumbun silikon carbide. A cikin wannan hanya, busassun silicon carbide foda yana cika a cikin wani nau'i kuma yana zafi yayin da ake amfani da matsa lamba daga jagorar uniaxial. Wannan dumama da matsa lamba na lokaci guda yana haɓaka yaduwar barbashi, kwarara, da canja wurin taro, yana haifar da yumbu na siliki carbide tare da kyawawan hatsi, ƙarancin dangi, da kyawawan kaddarorin inji. Koyaya, matsi mai zafi shima yana da rashin amfani. Tsarin ya fi rikitarwa kuma yana buƙatar kayan ƙira masu inganci da kayan aiki. Ayyukan samarwa yana da ƙasa kuma farashin yana da yawa. Bugu da ƙari, wannan hanya ta dace ne kawai don samfurori tare da siffofi masu sauƙi.
3. Hot isostatic latsa sintering:
Hot isostatic pressing (HIP) sintering wata dabara ce da ta ƙunshi aikin haɗin gwiwar babban zafin jiki da daidaitaccen iskar gas mai matsa lamba. Ana amfani dashi don sintiri da ƙima na silicon carbide yumbu foda, kore jiki ko riga-sintered jiki. Ko da yake HIP sintering na iya inganta aikin silicon carbide yumbura, ba a ko'ina a yi amfani da taro samar saboda da rikitarwa tsari da kuma tsada tsada.
4. Rashin matsi:
Sintering mara matsi hanya ce tare da kyakkyawan aikin zafin jiki, sauƙi mai sauƙi da ƙarancin farashi na yumbu na silicon carbide. Hakanan yana ba da damar hanyoyin ƙirƙira da yawa, yana sa ya dace da sifofi masu rikitarwa da sassa masu kauri. Wannan hanya ta dace sosai don samar da manyan masana'antu na kayan aikin silicon.
A taƙaice, tsarin sintering mataki ne mai mahimmanci a cikin samar da yumbu na SiC. Zaɓin hanyar sintering ya dogara da dalilai kamar abubuwan da ake so na yumbura, ƙayyadaddun siffar, farashin samarwa da inganci. Kowace hanya tana da nata abũbuwan amfãni da rashin amfani, kuma yana da muhimmanci a yi la'akari da wadannan abubuwa a hankali domin sanin mafi dace sintering tsari ga wani aikace-aikace.
Lokacin aikawa: Agusta-24-2023