Kev tshuaj xyuas lub cev thiab tshuaj lom neeg ntawm Silicon Carbide Ceramics

Txij li thaum nws nrhiav tau nyob rau hauv lub xyoo pua 20th, silicon carbide ceramics tau txais kev saib xyuas thoob plaws vim lawv lub cev thiab tshuaj lom neeg tshwj xeeb. Raws li kev ua haujlwm siab uas tsis yog oxide ceramic, silicon carbide tsis tsuas yog ua kom pom nws qhov zoo tshaj plaws ntawm cov khoom siv, tab sis kuj ua lub luag haujlwm tseem ceeb hauv ntau qhov chaw hnyav. Kab lus no yuav qhia txog cov yam ntxwv tseem ceeb ntawm silicon carbide ceramics thiab yuav ua li cas cov yam ntxwv no ua rau lawv nyiam cov ntaub ntawv siv rau kev lag luam.
1, High hardness thiab hnav tsis kam
Ib qho ntawm cov yam ntxwv tseem ceeb tshaj plaws ntawm silicon carbide ceramics yog nws cov hardness ultra-siab, thib ob tsuas yog pob zeb diamond. Cov yam ntxwv no tshwm sim los ntawm cov khoom muaj zog ionic covalent ntawm nws cov nyiaj hauv Si-C, uas tso cai rau silicon carbide ceramics nrog lub zog siab compressive thiab shear tsis kam. Nyob rau tib lub sijhawm, qhov zoo ntawm kev hnav tsis kam ntawm silicon carbide muab nws lub neej ntev kev pab cuam hauv ib puag ncig hnav, ua rau nws tsim nyog rau kev tsim ntau yam hnav-tiv taus.
2, Zoo thermal stability
Silicon carbide ceramics tuaj yeem tswj kev ruaj ntseg ntawm qhov kub txog li ntau txhiab degrees, nrog rau qhov qis coefficient ntawm thermal expansion, thiab tseem tuaj yeem tuav lub zog thiab hardness ntawm qhov kub thiab txias. Qhov no ua rau cov khoom siv silicon carbide ceramics tuaj yeem nthuav tawm qhov kev ua tau zoo tsis sib xws hauv cov txheej txheem kub kub, xws li cov rooj tog zaum, roj turbine combustion chambers, thiab lwm yam.
3, Zoo thermal conductivity
Silicon carbide ceramics yog cov thermal conductors zoo heev, nrog thermal conductivity ntau dua li feem ntau cov ntaub ntawv ceramic thiab txawm nyob ze rau qee yam hlau. Cov yam ntxwv no ua rau nws ua tau zoo nyob rau hauv cov ntawv thov uas yuav tsum tau hloov cov cua sov sai sai, xws li cov phaj kub dissipation rau cov khoom siv hluav taws xob.
4, Zoo heev tshuaj stability
Silicon carbide ceramics muaj kev ruaj ntseg zoo rau feem ntau cov kua qaub thiab cov hauv paus thiab tsis yooj yim cuam tshuam los ntawm cov tshuaj corrosion. Hauv kev lag luam xws li tshuaj lom neeg thiab metallurgical, tus yam ntxwv ntawm silicon carbide ceramics ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev tuav cov tshuaj corrosive.
5, Hluav taws xob rwb thaiv tsev thiab semiconductor zog
Ntshiab silicon carbide ceramics yog cov hluav taws xob zoo hluav taws xob, tab sis los ntawm doping, lawv tuaj yeem dhau los ua semiconductors. Cov yam ntxwv no ua rau silicon carbide muaj ntau yam ntawm daim ntawv thov kev cia siab nyob rau hauv lub tshav pob hluav taws xob hluav taws xob, rau kev tsim khoom siv hluav taws xob ua haujlwm siab.
6, Xaus
Silicon carbide ceramics tau pom muaj peev xwm zoo hauv ntau qhov chaw siab kawg vim lawv cov khoom siv kho tshuab zoo, thermal stability, tshuaj inertness, thiab kho hluav taws xob cov khoom. Nrog rau kev nce qib ntawm kev tsim technology thiab txo cov nqi, nws xav tias daim ntawv thov ntawm silicon carbide ceramics yuav nthuav dav ntxiv, thiab nws qhov tseem ceeb hauv kev lag luam yuav loj hlob ntxiv.