Rufe foda ya haɗa da haɓaka yanayin zafi na ƙarancin kore, (ɓangaren foda da aka danna), zuwa wani matakin da ajiye shi a wannan zafin na wani ɗan lokaci.Matsakaicin zafin jiki yawanci tsakanin 70% zuwa 90% na wurin narkewar foda.Wannan zai haifar da hanyoyin haɗin gwiwa don faruwa a tsakanin ɓangarorin foda da aka matse tare a cikin m.Haɗin kai a cikin ƙaramin ƙaramin kore yana da rauni kuma wannan ɓangaren da ba a haɗa shi ba yawanci yana da isassun ingancin tsarin da za a sarrafa.Haɗin kai da ke faruwa yayin sintering yana ƙarfafa sashin sosai.
A lokacin sintering, daidaitattun sifofin barbashi suna ɓacewa kuma kayan suna zama azaman taro.Sintering na al'ada ba zai kawar da duk porosity a cikin ɓangaren ba, duk da haka yana rage yawan porosity.Baya ga rage girman girma, sintering kuma na iya keɓance wuraren da ke da haɗin haɗin gwiwa a cikin ƙaramin ƙaramin kore.Wadannan wuraren keɓe sun zama rufaffiyar porosity, tun da an yanke su daga yanayin waje.Sintering yana da alaƙa a cikin ƙona abubuwan ƙari a cikin foda waɗanda suka zama dole don matakan sarrafawa a baya.Kawar da abubuwan da ba a buƙata kamar su man shafawa, masu ɗaure da ɓangarorin ɓarkewa, yana da mahimmanci don kiyaye tsabtar kayan samfurin ƙarshe.Baya ga haɓaka ƙarfi da yawa na kayan ɓangaren, sintering kuma yana haɓaka ductility, thermal conductivity da wutar lantarki.Ƙunƙasa zai faru a lokacin sintering, amma za a lissafta don lokacin da ake sarrafa abubuwan sarrafawa.
Hanyoyin da ke haifar da haɗin gwiwa yayin sintering sun bambanta kuma suna da rikitarwa.Babban hanyar da haɗin gwiwa ke faruwa ana ɗaukarsa yaduwa, hanyoyin za su bambanta dangane da abubuwan sarrafawa da halayen foda.Wasu hanyoyin da za su iya faruwa tare da yadawa sune kwararar filastik, recrystallization, haɓakar hatsi, jigilar kayan lokaci na ruwa da jigilar kayan lokacin tururi.Halayen jiki na nau'ikan haɗin gwiwa daban-daban na iya bambanta.An kwatanta haɗin barbashi ta hanyoyi daban-daban guda biyu a ƙasa.Haɗin haɗin yaduwa yana raguwa tsakanin barbashi, yana rage sarari.Jirgin kayan zamani yana ƙara abu, yayin da yake kiyaye barbashi daidai da nisa.
Hanyoyin haɗin gwiwa yayin sintering suna da rikitarwa kuma daban-daban, duk da haka babban ƙarfin motsa jiki wanda ke haifar da wannan haɗin gwiwa ana ɗaukarsa a matsayin raguwar makamashi saboda raguwar sararin samaniya.Foda tare da babban yanki mai girma za su sami ƙarfin motsa jiki mafi girma zuwa haɗin kai da raguwar wannan ƙarfin makamashi.
Gano foda na karfe daban-daban kuma yana faruwa a lokacin sintiri.Matsakaicin zafin jiki dole ne koyaushe ya kasance ƙasa da yanayin narkewar aƙalla ɗaya daga cikin abubuwan foda.A wasu lokuta, zafin zafin jiki yana sama da wurin narkewa na ɗayan kayan amma ƙasa da wurin narkewar ɗayan.Wannan ake kira ruwa lokaci sintering.Rashin lokaci na ruwa na iya kawar da porosity kuma ya samar da sassa tare da kyawawan kayan abu.
Lokacin aikawa: Maris-04-2017