Lub sinter phaj yog ib qho cuab yeej siv los nqa thiab thauj cov embryo raug rho tawm haujlwm rau hauv cov khoom siv ceramic.Nws yog tsuas yog siv nyob rau hauv lub ceramic kiln ua ib tug cab kuj rau bearing, tshav kub rwb thaiv tsev thiab conveying cov burned ceramics.Los ntawm nws, nws tuaj yeem txhim kho cov cua sov tshaj tawm ntawm cov phaj sintering, ua rau cov khoom siv sintering sib npaug, txo qis kev siv hluav taws xob thiab ua kom cov hluav taws kub ceev, txhim kho cov zis, kom cov khoom siv hluav taws xob tib yam tsis muaj xim sib txawv thiab lwm yam zoo.
Corundum mullite cov khoom muaj thermal poob siab tsis kam thiab kub siab zog, thiab zoo tshuaj stability thiab hnav tsis kam.Yog li ntawd, nws tuaj yeem siv tau ntau zaus ntawm qhov kub thiab txias, tshwj xeeb tshaj yog rau sintered magnetic cores, ceramic capacitors thiab insulating ceramics.
Sintering khoom yog laminated sintering khoom.Txhua txheej ntawm sintering phaj ntxiv rau cov khoom hnyav yog li 1kg, feem ntau l0 txheej, yog li sintering phaj yuav dais siab tshaj plaws ntawm ntau tshaj kaum kilograms.Nyob rau tib lub sijhawm, kom dais qhov thrust thaum tsiv thiab kev sib txhuam ntawm kev thauj khoom thiab tshem tawm cov khoom, tab sis kuj muaj ntau lub caij txias thiab kub, yog li ntawd, kev siv ib puag ncig yog hnyav heev.
Yog tsis xav txog kev sib cuam tshuam ntawm peb yam, alumina hmoov, kaolin thiab calcination kub tag nrho cuam tshuam rau thermal shock resistance thiab creep.Lub thermal shock kuj nce nrog ntxiv ntawm alumina hmoov, thiab nws txo qis nrog qhov nce ntawm qhov kub thiab txias.Thaum cov ntsiab lus kaolin yog 8%, lub thermal shock kuj yog qhov qis tshaj, ua raws li cov ntsiab lus kaolin ntawm 9.5%.Cov creep txo qis nrog qhov sib ntxiv ntawm alumina hmoov, thiab cov creep yog qis tshaj thaum cov ntsiab lus ntawm kaolin yog 8%.Lub creep yog siab tshaj plaws ntawm 1580 ℃.Txhawm rau muab kev txiav txim siab rau cov thermal shock tsis kam thiab creep tsis kam ntawm cov ntaub ntawv, cov txiaj ntsig zoo tshaj plaws tau txais thaum cov ntsiab lus alumina yog 26%, kaolin yog 6.5% thiab calcination kub yog 1580 ℃.
Muaj qee qhov sib txawv ntawm corundum-mullite hais thiab matrix.Thiab muaj qee qhov tawg nyob ib puag ncig cov khoom, uas yog tshwm sim los ntawm qhov tsis sib xws ntawm thermal expansion coefficient thiab elastic modulus ntawm cov khoom thiab cov matrix, uas ua rau microcracks hauv cov khoom.Thaum lub expansion coefficient ntawm hais thiab matrix tsis sib xws, cov aggregate thiab matrix yog ib qho yooj yim los cais thaum rhuab los yog txias.Ib txheej sib txawv yog tsim ntawm lawv, uas ua rau cov tsos ntawm microcracks.Lub hav zoov ntawm cov micro-cracks yuav ua rau degradation ntawm mechanical zog ntawm cov khoom, tab sis thaum cov khoom raug thermal shock.Nyob rau hauv qhov sib txawv ntawm aggregate thiab matrix, nws muaj peev xwm ua si lub luag hauj lwm ntawm buffer cheeb tsam, uas muaj peev xwm nqus tau tej yam kev ntxhov siab thiab tsis txhob muaj kev nyuaj siab concentration nyob rau hauv lub tawg ntsis.Nyob rau tib lub sijhawm, thermal shock tawg nyob rau hauv matrix yuav nres ntawm qhov sib txawv ntawm cov khoom thiab cov matrix, uas tuaj yeem tiv thaiv kev tawg tawm.Yog li, thermal shock kuj ntawm cov khoom yog txhim kho.
Post lub sij hawm: Apr-08-2022