Cov yam ntxwv ntawm cov cua kub feem ntau siv nyob rau hauv ultra-siab kub hluav taws xob rauv:

Molybdenum: Feem ntau siv nyob rau hauv lub tshuab nqus tsev sintering rauv ntawm 1600 ° C, lub volatilization ceev ntawm 1800 ° C nyob rau hauv lub tshuab nqus tsev vacuum, thiab lub volatilization tsis muaj zog nyob rau hauv cov huab cua tiv thaiv hydrogen vim lub siab yam, thiab nws yuav siv tau mus txog 2000 ° C. ;

tungsten: Feem ntau siv rau hauv lub tshuab nqus tsev sintering rauv ntawm 2300 ° C, lub volatilization ceev thaum lub tshuab nqus tsev yog 2400 ° C, lub volatilization tsis muaj zog nyob rau hauv cov huab cua tiv thaiv hydrogen vim lub siab yam, thiab yuav siv tau ntawm 2500 ° C);

Tantalum: Feem ntau siv nyob rau hauv lub tshuab nqus tsev sintering rauv ntawm 2200 ° C. Tsis zoo li tungsten thiab molybdenum, tantalum tsis tuaj yeem ua haujlwm hauv qhov chaw uas muaj hydrogen thiab nitrogen. Nws qhov zoo dua yog tias nws qhov kev ua tau zoo thiab kev ua haujlwm vuam zoo dua li cov tungsten thiab molybdenum;

Graphite: Feem ntau siv nyob rau hauv lub tshuab nqus tsev sintering rauv ntawm 2200 ° C, lub volatilization ceev ntawm 2300 ° C nyob rau hauv lub tshuab nqus tsev vacuum, thiab lub volatilization tsis muaj zog vim lub siab nyob rau hauv lub tiv thaiv huab cua (inert gas), uas yuav siv tau ntawm 2400 °. C;

1. Tantalum yog dav siv nyob rau hauv lub tshuab nqus tsev vacuum furnaces vim nws zoo heev machining kev kawm thiab vuam kev kawm. Txawm li cas los xij, vim nws qhov ntsuas kub ntawm 2200 ° C thiab nws tsis muaj peev xwm siv hauv kev tiv thaiv roj, nws txwv nws txoj kev siv. Cov hlau refractory xws li tantalum thiab niobium yuav nqus tau ntau cov hydrogen atoms hauv qhov chaw hydrogen, thiab yuav ua rau hydrogen tawg thaum txias. Cov hlau xws li niobium thiab tantalum yog qhov yooj yim rau embrittlement nyob rau hauv ib puag ncig hydrogen ntawm qhov kub thiab txias, yog li lawv tsis tuaj yeem tiv thaiv los ntawm hydrogen.

Dab tsi ntawm kev tiv thaiv roj tantalum tuaj yeem siv los txo cov volatilization? Ntxiv nrog rau kev siv cov argon tiv thaiv thiab argon-hydrogen sib xyaw roj tiv thaiv, tsuav yog cov roj uas tsis hnov ​​​​mob nrog tantalum thaum lub sij hawm kho qhov kub thiab txias, nws tuaj yeem siv los ua huab cua tiv thaiv. Lub stability ntawm argon yog zoo dua li ntawm nitrogen. Txawm li cas los xij, qhov inertness ntawm nitrogen yog txheeb ze, uas yog, nws tsis haum rau qee yam kev cuam tshuam. Magnesium tuaj yeem hlawv hauv nitrogen. Yog li ntawd, tej zaum cov tshuaj tiv thaiv tsis tuaj yeem siv nitrogen los tiv thaiv roj, tab sis tuaj yeem xaiv argon xwb. Yuav ua li cas ua tungsten thaiv coated nrog tantalum khoom: Nws tuaj yeem ua tiav los ntawm cov plasma txau ib txheej tantalum rau saum npoo ntawm cov khoom tungsten nyob rau hauv kev tiv thaiv ntawm argon cua.

2. Tungsten Vim tias tungsten muaj qhov ua tau zoo ntawm qhov kub thiab txias, nrog rau kev txhim kho thiab txhim kho kev tsim thiab kev siv tshuab, tungsten yog dav siv hauv lub tshuab nqus tsev kub kub. Tsis muaj teeb meem nrog kev siv tungsten hauv qhov cub hauv qab 2300 ℃. Thaum 2300 ℃, qhov volatilization yuav nrawm dua, uas yuav cuam tshuam rau lub neej kev pabcuam ntawm lub cev cua sov. Yog li ntawd, feem ntau pom zoo kom siv hydrogen tiv thaiv cua ntawm 2200 ~ 2500 ℃;

3. Graphite cua sov caij yog siv rau cua sov graphite hauv lub tshuab nqus tsev. Nws yog high-purity, high-strength, isotropically tsim isotropic peb-siab graphite, txwv tsis pub txhim khu kev qha high-temperature kev ua tau zoo, hluav taws xob kev ua tau zoo thiab kev pab cuam lub neej yuav tsis tau.

4. Nyob rau hauv nruab nrab thiab tsis kub tsis kam lub tshuab nqus tsev rauv, vim yog qhov kub thiab txias, tungsten feem ntau tsis siv, feem ntau tsuas yog siv graphite, tantalum, thiab molybdenum; rau qhov cub kub hauv qab 1000 ℃, cov khoom siv nickel-cadmium thiab hlau-chromium-aluminium cov ntaub ntawv kuj tseem siv tau. Tos.