(Ntsiav SI3N4Tsim los ntawmWintrustek)
Sintering yog cov txheej txheem uas cov khoom hmoov uas tau sib xyaw thiab ua kom sov los ua cov khoom tawv. Feem ntau, cov txheej txheem muaj nyob hauv qab cov ntaub ntawv 'melting point. Cov hais tau raug coj mus rau hauv qhov ze ntawm cov txheej txheem Sintering, thiab cov ntawv thov cua sov txhawb nqa atomic bonding thiab ua rau densification thiab tsim cov qauv cua. Cov hlau, cov khoom sib xyaw, thiab ceramics yog feem ntau tsim los ntawm sintering.
Cov txheej txheem hu ua "Kub OOSTATIC nias," lossis "HIP," yog siv los txhim kho cov neeg kho tshuab zoo thiab kev ntseeg siab ntawm cov ntaub ntawv. Nws nkag rau ib txhij thov kev siv siab thiab ntsuas kub rau cov khoom siv. Nyob rau hauv lub ntsag txheej txheem, ib qho roj inert yog siv los ua kom nias cov khoom uas tau muab rhaub kom muaj lub nkoj ua haujlwm hauv lub siab siab. Kev kub siab thiab kub ua haujlwm ua ke kom tshem tawm cov flaws hauv casting hauv casings, xws li pores, thiab solids hmoov metallurgy cov khoom siv.
Sintering nyob rau hauv lub siab (hip: kub iSostatic nias, hp: kub nias) muaj qhov zoo dua ntawm kev txo qis ntawm cov khoom kub thiab ntev li piv rau ntuj lossis dawb Sinining. Raws li qhov tshwm sim, nws yog qhov ua tau kom ua tiav cov nqi ntsuas kom tau los ze rau qhov tsis zoo siab thaum ib txhij txhim kho kev tswj hwm ntawm lub micrtructures tsis pub dhau lub ceramics.
Cov qauv ntawm isostatic siab
Ua ntawv thov siab rau ntawm cov khoom ib txhij los ntawm txhua cov lus qhia yog hu ua iSostatic nias. Qhov no yog ua tiav los ntawm kev tso cov tshuaj hauv ib lub hnab lossis ntim ntim thiab thov kom nws siv cov kua dej nruab nrab, feem ntau yog cov roj ntsha xws li areg. Anisotropy thiab qhov khuam tsis muaj tsawg dua thaum lub siab yog siv cov khoom siv tsis zoo txij li qhov no lav tias cov khoom siv yog densified uniformly.
Cov ntsiab cai ntawm Kub Isostatic nias
Kev tsim khoom lag luam hu ua Kub Isostatic nias (hip) siv cov lus qhia siab siab thiab kub nyob rau hauv txhua cov lus qhia rau cov ntaub ntawv ntau rau cov ntaub ntawv, tshwj xeeb tshaj yog cov lus ceramics tshwj xeeb tshaj yog. Rau zus tau tej cov kev ua haujlwm siab ceramics nrog kev txhim kho mechanical tshuab, thermal, thiab cov hluav taws xob, hom no yog qhov tseem ceeb.
Cov txheej txheem ntawm Kub Isostatic nias:
Lub cev ntsuab tsim → ntsuab lub cev muab tso rau hauv ib lub kaw lus ntim → tswj hwm cua sov thiab ntsuas kub thiab kub thiab txias
Wintrusek tau tsim ntau hip Si3N4, ntawm no, peb tsuas yog quab yuam ntawm kev qhia ntawmNtsiav SI3N4.
Kub Isostatic Pressing (HIP) Silicon Nitride Cov Pobyog ntawm cov kev tshaj lij feem ntau rau kev tsim cov khoom silicon nitride. Nws yog qhov tseem ceeb rau nws lub peev xwm ua haujlwm hauv kev teeb meem uas ib txwm muaj ua tsis muaj txiaj ntsig. Vim tias nws cov qauv resilient resilient, nws tuaj yeem tiv taus cua sov thiab nyob ruaj khov nyob rau hauv lub ntsej muag ntawm kev hloov pauv kub. Vim tias nws tsis yog kev sib nqus thiab tsis sib nqus, nws tuaj yeem siv nrog cov khoom siv hluav taws xob lossis cov khoom siv tshuaj kho mob, thiab cov khoom siv tshuaj ntsuab Lub ceramic lub ceramic no yog txhim khu kev qha no puas yog siv rau hauv lub tshuab nqus tsev, nthuav tawm cov tshuaj lom neeg, lossis khiav yam tsis muaj tshuaj.
Qhov zoo ntawm HIP SI3N4 pob:
Hnav-resistant
Lub teeb yuag,
Tshuaj rwb thaiv tsev
Lub zog dua compressive zog.
Ntau dua densification. Kev daws teeb meem sab hauv lossis sab hauv qhov tsis xws luag, tshwj xeeb tshaj yog qhov porosity, tom qab ntawd, peb tuaj yeem tau txais cov nyhuv seem zoo.
Siab dua. Cov khoom siv tej hub muaj nkig. Nrog kev nruj dua siab dua, thaum poob siab hnyav, cov kab nrib pleb thiab qhov tsis xws luag yuav tshwm sim tsawg dua. Peb tuaj yeem hais tias kev nruj dua ib zaug ntxiv tuaj yeem zam kev ua tsis tiav.
Kom suav, Kub Isostatic nias yog cov txheej txheem hloov pauv hauv kev ua haujlwm ceramic uas qhib cov khoom lag luam thiab muab txoj hauv kev kom cov khoom zoo dua. Txhawm rau tsim ceramics uas txaus siab ua kev ua haujlwm siab xav tau, cov txheej txheem hip kom meej meej tswj qhov kub, thiab lub sijhawm. Nws plays lub luag haujlwm tseem ceeb hauv kev txhim kho cov ntaub ntawv ceramic thiab lawv siv hauv cov teb tseem ceeb. Raws li rau lub duav pob, nyob rau hauv kev xav tau kev kub ceev, kev kho-kev kho hluav taws xob, thiab lwm qhov chaw ua haujlwm ib puag ncig, lawv ua si nrog kev ywj pheej ntawm kev ywj pheej thiab kev nyab xeeb.
