Dab tsi yog qhov kev faib tawm thiab cov ntaub ntawv ntawm cov ntxaij lim dej ceramic?

Cov khoom siv tseem ceeb ntawm cov khoom siv lim dej ceramic yogsilicon carbide, zirconium oxide thiab alumina
Ua npuas ncauj ceramic lim muaj qhov pom zoo ntawm cov dej tooj liab lossis hlau, siv cov qauv peb sab, tshem tawm cov oxidized sib tov thiab lwm yam tsis yog xim hlau sib xyaw, thaiv kev ntes thiab adsorption. Seb nws yog grey hlau, ductile hlau los yog ncej, lub tog raj kheej los yog complex loj qhov chaw, precision casting qhov chaw lim, cov khoom zoo yuav ua tau txaus siab.
Ceramic ua npuas ncauj limkuj tseem haum rau tooj liab, tooj liab, tooj dag thiab lwm yam tooj liab alloys, txo cov tooj liab kua turbulence thiab rectifying thiab purifying molten steel. Tshwj xeeb tshaj yog muaj txiaj ntsig yog qhov tseem ceeb ntawm kev pabcuam lub neej ntawm tooj liab castings hauv qhov xav tau ntau lossis hnyav ib puag ncig xws li marine nkoj turbines, tshuaj lom neeg, thiab lwm yam. Nws kuj muaj txiaj ntsig zoo rau cov tooj liab castings nrog rau qhov xav tau polishing. Foam ceramic lim kuj ua lub luag haujlwm tseem ceeb hauv kev tsim tooj liab tsoos, kev tsim hluav taws xob tooj liab thiab cov txheej txheem nruam casting thiab dov. Vim tias qhov loj ntawm tooj liab thiab alloys, suav nrog zinc alloys, uas ua rau muaj kev kub ntxhov ntau dua thaum lub sij hawm casting txheej txheem, kev siv cov silicon carbide ua npuas ncauj amalgamated ceramic lim feem ntau raug rau cov kev cai nruj me ntsis.
Khoom siv
Cov khoom siv yooj yim rau cov lim dej ceramic yog oxidized huv Zr02.zirconia limmuaj qhov kub-resistant kub siab tshaj li ntawm 1760 ° C, siab zog thiab zoo kub-kub cuam tshuam.
Cam khwb cia hlau qhov chaw yog dav siv nyob qhov twg siab zog thiab elongation yuav tsum tau. Yog li ntawd, cam khwb cia hlau qhov chaw yog rhiab heev rau impurity-induced luv luv-circuiting, thiab cov yam ntxwv zoo heev ntawm foam ceramic lim tau zoo tshem tawm cov impurities uas thaum kawg ua rau cov khoom zoo luv luv-circuiting. Cov impurities feem ntau yog tsim los ntawm cov khoom tsis yog xim hlau, cov slag thiab cov khib nyiab refractory, uas txhim kho qhov zoo thiab cov khoom siv hluav taws xob ntawm castings thiab txo cov seem seem.
Ceramic ua npuas ncauj lim tuaj yeem ua rau cov kua hlau ua rau cov kab noj hniav sib npaug, thiab cov hlau molten muaj qhov ua rau muaj kev kub ntxhov hauv cov txheej txheem nchuav. Peb-dimensional pore qauv ntawm lubceramic ua npuas ncauj limturbulent flow yog nws thiaj li hloov mus rau ib tug heev ruaj khov laminar flow. Lub laminar ntws zoo dua nyob rau hauv cov kab noj hniav, yog li txo qhov cuam tshuam corrosion ntawm cov hlau tov ntawm cov kab noj hniav casting thiab txo cov nqi pov tseg.