Thaum cov neeg muas zaub xauj cov ntaub ntawv ntawm cov roj ntsha silicon carbide pas dej rhaub thiab molybdenum pas nrig, lawv feem ntau pom lo lus thermal ntxhov siab. Kev nyuaj siab thermal txhais li cas? Dab tsi yog qhov txuas ntawm silicon carbide pas nrig thiab silicon molybdenum pas nrig?
Ua ntej tshaj plaws piav dab tsi yog hu ua kev nyuaj siab thermal. Raws li Baidu Encyclopedia tau piav qhia, thaum qhov ntsuas kub hloov, qhov kev nyuaj siab sab nraud los ntawm qhov khoom siv thiab kev sib nrig sib sab nruab nrab ntawm qhov chaw sab hauv, yog li qhov kev ntxhov siab uas tsis tuaj yeem ua tiav ywj pheej thiab cog lus yog hu ua thermal stress, tseem hu ua kev hloov pauv kub Cov. Coj iav piv txwv. Peb txhua tus paub tias thaum lub khob tso rau ntawm cov nplaim taws, nws yuav tawg tom qab ib ntus. Vim hais tias nyob rau lub sijhawm no iav tau muab rhaub ntawm ib sab thiab tsis yog rau lwm qhov. Vim tias cov yam ntxwv ntawm kev nthuav tawm thermal thiab nqes, qhov kub sab yog sim kom nthuav dav sai sai rau lub sijhawm no, thaum sab tsis tuaj yeem yog rub cov ceg ntoo txuas ntawm sab kub, qhov nthuav tawm tsis nrawm dua, uas yog thermal kev ntxhov siab, vim tias daim iav yog nkig, Xav xum thiab tsis muab rau ib leeg, thaum kawg ua rau tawg.
(Kev yooj yim ntawm kev piav qhia, cov hauv qab no tsom mus rau silicon carbide rhaub, silicon carbide pas nrig thiab molybdenum pas nrig yog qhov zoo sib xws.) Cia peb saib seb qhov kev nyuaj siab thermal zoo li cas hauv silicon carbon pas nrig. Ua ntej, lub silicon carbon qws yog suav hais tias yog qhov zoo li tus cylindrical puab (silicon carbide cua sov cov ntsiab lus yog qhov ua tau rau hollow lub tog raj kheej, uas kuj yog rau kev yooj yim ntawm kev piav qhia thiab nkag siab). Thaum twg qhov kub nce, qhov kub sab nraud yog qhov qis dua vim qhov qis hu rau sab nraud. Nws qis me ntsis, thiab qhov ntsuas kub sab hauv yog qhov siab dua, yog li qhov kev sib cais sab hauv yog qhov loj dua lub zog nthuav tawm sab nraud. Lub sijhawm no, cov kev kub ntxhov siab tsim tawm, thiab sab hauv yog kev txhawb nqa los ntawm sab nraud kom nthuav. Thaum lub ntsuas cua txias qis, sab nraud yog txias los ntawm cov cua hauv lub tshuab xa khoom, thiab qhov kub sab hauv yuav qeeb qeeb. Lub sijhawm no, sab nraud xav kom tsawg zuj zus thiab sab hauv shrinks tsis nrawm, uas kuj ua rau muaj kev ntxhov siab thermal. Silicon-silicon rods Molybdenum-molybdenum cov pas nrig maj mam sov thiab txias, thiab lawv lub zog yog loj dua li ntawm iav. Yog li ntawd, lawv tsis tawg zoo li iav, tab sis lawv kuj muaj qee yam cuam tshuam, xws li sab saum npoo ntawm silica tiv thaiv zaj duab xis.
Thaum tsim cov roj silicon carbide rhaub, nws yog qhov tsim nyog los siv silicon carbide hais nrog ntau qhov loj me hauv qhov sib xyaw ua ke. Vim li cas ho tsis siv hnav loj me me silicon carbide hais?
Yog tias ib qho kev sib koom ua ke loj ntawm silicon carbide siv, qhov ntau yuav tsis siab, uas yuav ua rau muaj coob ntawm cov qhov me me hauv silicon carbon pas nrig. Xws li SIC pas cua sov tsis zoo hauv kev ncaj ncees, thiab tsis ruaj thiab tsis raug rau oxidation. Yog tias cov silicon carbide hais nrog cov khoom loj me me tau siv raws li kev siv, lub zog ntawm silicon carbon pas nrig tsim yuav tsis zoo, qhov nyuaj ntawm kev tsim khoom yuav loj dua, kev siv hluav taws xob yuav loj dua, thiab ntau yam teeb meem xws li kev ua tsis tiav sintering thiab khoov yuav yooj yim tshwm sim. Kev siv ntau qhov sib txawv ntawm silicon carbide yog kom ntseeg tau tias qhov ntau tshaj qhov siab tshaj plaws thaum paub tseeb tias lub zog ntawm silicon carbon pas nrig, kom lub silicon carbon pas nrig yuav muaj zog, ntau ruaj thiab zoo dua nyob rau hauv oxidation tsis kam.
Qhov kev faib ua feem ntawm silicon carbide siv los ntawm ntau yam silicon carbon pas nrig tsim nyob rau hauv cov khoom lag luam silicon cov pa roj carbon hlau yuav txawv me ntsis vim cov khoom sib txawv thiab ib puag ncig. Yog tias koj xav txiav txim siab ua kom zoo ntawm SIC Cov Khoom Cua Sov los ntawm cov tsos, koj tuaj yeem sim nws. Nws raug nquahu kom siv cov pas nrig qub uas siv tsis tau. Tom qab tawg tas, saib seb puas yog tshooj ntawm tus nqaj puas du thiab qhov ncaj ncees yog qhov muaj zog. Qhov tsis paub meej lub zuag qhia tag nrho yuav yog tias qhov sintering tsis tiav tsis txaus lossis qhov loj me me ua kom sib haum tsis zoo. Xws li silicon carbide elementsare tsis muaj zog txaus siv thiab muaj qhov tsis zoo oxidation tsis kam.