Kev tshawb fawb tseem ceeb ntawm cov ntaub ntawv sib txhuam
Txhawm rau hloov mus rau kev txhim kho ntawm kev lag luam tshuab, txhim kho thiab tshawb nrhiav cov ntaub ntawv sib txhuam tshiab, tsom mus rau cov hauv qab no: txhim kho qhov hnav tsis kam ntawm cov ntaub ntawv uas txiav txim siab lub neej kev pab cuam ntawm lub tshuab nres; tau txais ib tug txaus siab thiab ruaj khov kev sib txhuam coefficient los xyuas kom meej kev ua hauj lwm ntawm lub nres thiab kis ntaus ntawv Reliability thiab stability.
Lub tshav kub tsis kam ntawm kev sib txhuam cov ntaub ntawv tuaj yeem ua tau los ntawm ob qhov ntsuas: qhov kub thiab txias oxidation tsis kam thiab lub peev xwm ntawm cov hlau matrix yog lub hauv paus ntawm cov khoom kom muaj zog txhua yam. Txhawm rau kom ncav cuag qhov kub ua haujlwm siab dua, tau hloov pauv mus rau ntau cov hlau refractory thiab ntau dua alloying. Piv txwv li, hlau-raws li cov ntaub ntawv feem ntau yog siv los hloov bronze- cov ntaub ntawv raws li nyob rau hauv hnyav loads: nyob rau hauv thiaj li yuav ua rau kom lub kub ua hauj lwm thiab mechanical zog txwv ntawm tooj liab-raws li cov ntaub ntawv, txhuas yog siv los hloov tin rau hlau alloy; hlau-raws li cov ntaub ntawv ntxiv nrog npib tsib xee, cobalt, chromium, Elements xws li manganese, tungsten, thiab molybdenum alloy cov hlau-raws li cov khoom sib txhuam los txhim kho thermal stability thiab mechanical zog ntawm cov hlau{ {5}}raws li cov khoom sib txhuam.
Thaum hlau- cov ntaub ntawv sib txhuam raws li kev sib cuag nrog hlau ntawm qhov kub thiab txias, cov graphite tsis ruaj khov kuj tseem yuav hloov nrog inert anti-tshuaj cov neeg sawv cev (xws li boron nitride). Nyob rau hauv hnyav loads, npib tsib xee-raws li thiab tungsten-raws li hmoov metallurgy kev sib txhuam cov ntaub ntawv yog npaj. Txhawm rau txhim kho nws cov oxidation tsis kam, cov ntaub ntawv sib txhuam raws li stainless hlau fibers tau raug npaj. Rau kev hnav tsis kam, ntau alloying kuj yog siv los ua kom lub zog ntawm kev sib txhuam cov ntaub ntawv hlau matrix.
Txhawm rau txhim kho thiab ruaj khov ntawm kev sib txhuam coefficient, ntau txoj haujlwm tshawb fawb tau ua tiav los ntawm kev tshawb nrhiav cov tshuaj tiv thaiv kev sib txhuam tshiab thiab tiv thaiv -tuav cov neeg sawv cev. Txhawm rau txhim kho kev sib txhuam coefficient ntawm hlau-raws li cov ntaub ntawv sib txhuam, cov khoom sib txuas ntxiv: xws li boron carbide, silicon carbide, zirconium carbide, boron nitride thiab lwm yam. Rau kev ua haujlwm hnyav-, silicon dioxide ua tus neeg sawv cev sib txhuam yog hloov nrog carbides thiab nitrides.