Kev tshawb fawb ntawm thev naus laus zis los txhim kho thermal stability ntawm silicon carbide raj

Silicon carbide nanotubes (SCNTs), raws li cov ntaub ntawv tshiab nanomaterial uas muaj ob qho tib si thaj chaw tshwj xeeb thiab cov khoom siv hluav taws xob zoo, tau pom dav siv peev xwm hauv lub zog cia, khoom siv hluav taws xob, thiab catalysis hauv xyoo tas los no. Txawm li cas los xij, lawv qhov kev cuam tshuam rau cov txheej txheem degradation ntawm qhov kub thiab txias tau dhau los ua ib qho tseem ceeb ntawm kev txwv tsis pub siv cov tswv yim. Kev tshawb fawb thev naus laus zis hais txog qhov teeb meem no tau tsav kev nce qib hauv cov ntaub ntawv tshawb fawb.

Los ntawm cov khoom xaav, qhov thermal stability ntawm SCNTs yog ze ze rau qhov kev txiav txim ntawm lawv cov microstructure. Cov chaw tsis raug tsim thaum pib txheej txheem kev npaj feem ntau dhau los ua thaj chaw pib rau cov tshuaj tiv thaiv thermal decomposition. Los ntawm kev tswj cov txheej txheem synthesis tsis, lattice distortion tuaj yeem txo tau zoo, yog li txhim kho cov khoom siv hluav taws xob sab hauv. Qhov kev cuam tshuam kev cuam tshuam zoo raws li theem kev loj hlob nteg lub hauv paus rau kev ua tau zoo tom ntej.

Kev taw qhia txog kev hloov kho saum npoo av muab txoj hauv kev tshiab los txhim kho thermal stability ntawm SCNTs. Tshuaj grafting ntawm tej pab pawg ua hauj lwm mus rau lub raj phab ntsa tuaj yeem tsim cov txheej txheem tiv thaiv ntawm cov khoom nto, thaiv kev sib cuag ncaj qha ntawm cov pa oxygen molecules thiab cov qauv sab hauv. Cov txheej txheem no khaws cov thawj hluav taws xob conductivity ntawm SCNTs thaum txo qis oxidative degradation tus nqi, ua tiav qhov sib npaug ntawm kev ua haujlwm thiab kev ruaj ntseg.

Composite system kev tsim kho yog lwm qhov kev tshawb fawb tseem ceeb. Controllably combining silicon carbide hlab nrog rau lwm yam siab -cov ntaub ntawv kub resistant siv synergistic los suppress thermally induced deformation. Qhov no multi-cov khoom tsim tsis tsuas yog txhim kho tag nrho cov thermodynamic stability ntawm tus qauv tab sis kuj nthuav dav cov khoom siv qhov ntev, ua rau nws hloov tau rau ntau yam kev thov.

Nws yog qhov tsim nyog tias kev ua kom zoo dua ntawm kev ua haujlwm tom qab- cov txheej txheem kho cua sov yog qhov tseem ceeb sib npaug. Kev tswj xyuas meej ntawm qhov kub thiab txias thiab huab cua tuaj yeem tshem tawm qhov kev ntxhov siab uas nyob ntawm cov txheej txheem kev npaj thiab txhawb nqa kev ua kom zoo dua qub ntawm cov qauv siv lead ua. Qhov kev sib xyaw ua ke ntawm kev siv lub cev muaj zog thiab kev hloov kho tshuaj lom neeg ua kom tiav cov txheej txheem txhim kho.

Cov kev tshawb fawb tam sim no qhia tau hais tias kev siv dav dav ntawm kev tsim qauv, kev tsim vaj tsev nto, thiab cov txheej txheem sib xyaw ua ke tuaj yeem txhim kho cov thermal stability ntawm silicon carbide raj. Cov txiaj ntsig kev tshawb fawb no tau maj mam muab txhais ua cov qauv siv rau kev tsim khoom tiag tiag, tshem tawm cov teeb meem rau qhov loj - daim ntawv thov cov ntaub ntawv tshiab. Nrog rau kev nce qib ntawm cov txheej txheem ua tus cwj pwm tsis tu ncua, nws xav tias ntau yam tseem ceeb cuam tshuam rau thermal stability yuav tshwm sim nyob rau hauv lub atomic scale nyob rau hauv lub neej yav tom ntej, tsav tsheb cov khoom ua tau zoo mus rau qib siab dua.