Silicon carbide ceramics muaj qhov kub kub, cov coefficient muaj kev kub ntxhov, zoo thermal tsis kam, cov tshuaj corrosion tsis kam thiab lwm yam zoo heev.Nws tau siv dav hauv tsheb, kev tiv thaiv me, ib puag ncig tshuab hluav taws xob, thiab tau dhau los ua cov kev ua tau zoo hauv ntau cov kev ua haujlwm.Tam sim no cia kuv qhia koj!
Kev Ntsuas Cov Ntawv Sib Tw
Cov lus pom zoo yog suav tias yog qhov kev pheej hmoo tshaj plaws rau sic sintering.Raws li kev sib txawv sintering mechanisms, cov ntawv luam tawm sintering tuaj yeem faib ua cov khoom-theem sintering thiab kua-theem sintering.Los ntawm ultra-nplua β- ib qho txiaj ntsig ntawm b thiab c (oxygen cov ntsiab lus tsawg dua 2%) tau ntxiv rau cov hmoov sic zoo tib lub sijhawm, thiab s.Proehazka yog sintered rau sic sintered lub cev nrog ntom siab dua 98% ntawm 2020 ℃.A. Mulla li al.AL2O3 thiab Y2O3 tau siv los ua cov tshuaj ntxiv thiab sintered ntawm 1850-1950 ℃ rau 0.5 μ m β μ m μ μ μ m μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ-particle muaj ib qho me me ntawm Sio2).Tus txheeb ze yeej ntawm cov tau txais cov lus qhia Sic ceramics yog ntau dua 95% ntawm theoretical ceev, thiab cov noob loj yog me me thiab qhov nruab nrab loj.Nws yog 1.5 microns.
Cov xovxwm kub Sintering
Cov Sic Sic tuaj yeem tsuas yog sintered compactly nyob rau hauv kub heev yam tsis muaj sintering ntxiv, yog li muaj ntau tus neeg siv cov kub nias Sintering cov txheej txheem rau sic.Muaj ntau cov lus ceeb toom ntawm cov xovxwm kub nias Sintering ntawm SIC los ntawm kev ntxiv Sintering AIDS.AllieGro li al.Kawm txog cov nyhuv ntawm boron, txhuas, npib tsib xee, hlau, chromium thiab lwm yam hlau additives ntawm sic densification.Cov txiaj ntsig qhia tau tias txhuas thiab hlau yog cov tshuaj ntxiv zoo tshaj plaws los txhawb cov sic kub nias SINTERING.Fflange tau kawm cov nyhuv ntawm kev ntxiv cov nyiaj ntau ntawm al2o3 ntawm cov khoom ntawm kub nias SIC.Nws suav hais tias qhov kev txiav txim siab ntawm cov xovxwm kub muaj feem xyuam rau cov tshuab kev sib cais thiab nag lossis daus.Txawm li cas los xij, cov xovxwm kub Sintering cov txheej txheem tsuas yog tsim cov sic feem nrog cov duab yooj yim.Qhov ntau ntawm cov khoom lag luam tsim los ntawm ib-lub sijhawm kub xovxwm Sintering cov txheej txheem yog heev me me, uas tsis muaj txiaj ntsig rau kev lag luam kev lag luam.
Kub Isostatic nias Sintering
Txhawm rau kom kov yeej cov kev ua luv luv ntawm kev ua yeeb yam, B-hom thiab C-hom tau siv los ua cov ntxiv thiab kub tau nias thev naus laus zis tau sinter.Ntawm 1900 ° C, nplua frystalline crystalline crystalline ceramics nrog kev ceev tshaj 98 tau txais, thiab nws yog khoov lub zog ntawm chav tsev kub tuaj yeem ncav cuag 600 mpa.Txawm hais tias kub iSostatic nias Sintering tuaj yeem tsim cov qauv siv hluav taws xob ntau thiab cov sintering yuav tsum tau muab ntim, uas yog qhov nyuaj kom ua tiav kev lag luam.
Cov tshuaj tiv thaiv Sintering
Cov kev tawm tsam siintered Silicon carbide, kuj yog cov khoom lag luam zoo nkauj li roj av, hais txog cov khoom lag luam uas tau ua tiav nrog qee yam muaj zog thiab qhov raug zog thiab qhov raug.Noj cov hmoov thiab cov hmoov thiab graphite tau sib xyaw ua feem faib ua feem thiab rhuab mus txog 1650 ℃ los ua ib lub xwm fab xwm meem.Nyob rau tib lub sijhawm, nws nkag mus rau hauv lub nqi hauv fillet los ntawm faib thiab reacts nrog graphite los ua ntawv α- sic, ua ke nrog cov khoom uas twb muaj lawm.Thaum Si yog kiag li infiltrated, cov tshuaj tiv thaiv sintered lub cev nrog ua tiav ntom ntom thiab tsis shrinkage loj tuaj yeem tau txais.Piv nrog rau lwm cov txheej txheem sintering, qhov loj hloov pauv ntawm cov yeeb yam ntawm cov yeeb yam hauv Densification cov txheej txheem yog me me, thiab cov khoom uas muaj qhov loj me tuaj yeem npaj tau.Txawm li cas los xij, lub hav zoov ntawm ntau tus nqi ntawm sic hauv cov sintered lub cev ua rau lub siab-qhov hluav taws xob ntawm cov tshuaj tiv thaiv series ceramics tsis zoo dua.
Lub Sijhawm Post: Jun-08-2022