Tungsten Boride, WB

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Tungsten Boride, WB

Tungsten boride muaj qhov chaw siab melting, siab hardness, tshuaj lom neeg ruaj khov thiab lwm yam

cov khoom muaj zog. Nws tsis yog tsuas yog cov khoom siv superhard tshiab xwb, tab sis kuj tseem muaj tus nqi siab

lub cev tawv. Nws yog cov khoom siv mos txwv tseem ceeb hauv kev ua tub rog. Tungsten boride muaj

ntau ntu kev kos duab, thiab cov qauv


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Cov mis mos molecular  BW
Tus Lej  12007-09
Nta  hmoov dub thiab txho
Yog ceev  10.77 g / cm3
Melting taw tes 2900
Kev Siv BW muaj qhov chaw siab melting, siab hardness, siab conductivity thiab highstance thiab oxidation tsis kam rau ntau hom xov xwm. Theseex Ted lub zog ua rau WB cov khoom siv dav siv hauv cov khoom siv hnyav ib puag ncigQhov txheej txheej andhigh kub corrosion electrodematerials, casting pwm, crucible thiab hais txog.

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Tungsten boride
Nyiaj dawb octagonal siv lead ua.
Tus txheeb ze ceev 10.77, melting taw tes txog 2900 ℃.
Insoluble hauv dej, soluble hauv aqua regia.
Boron thiab tungsten hmoov tau muab sib xyaw ua kom sov siab.

Tungsten boride muaj qhov chaw siab melting, siab hardness, tshuaj lom neeg ruaj khov thiab lwm yam khoom muaj zog. Nws tsis yog tsuas yog cov khoom siv superhard tshiab xwb, tab sis kuj tseem muaj qhov siab tawv. Nws yog cov khoom siv mos txwv tseem ceeb hauv kev ua tub rog. Tungsten boride muaj kev ua tiav ntau ntu, thiab cov qauv ntawm cov theem sib txawv kuj hloov tau. Rau ntau dua 50 xyoo, tungsten qhov kev them tshaj plaws tau xav tias yog WB4, uas muaj daim phiaj peb-kawg ntawm kab ntawm boron atoms. Lub thermodynamic ruaj ntseg thiab cov yam ntxwv lub zog ntawm cov txheej txheem yam ntxwv tau los ntawm tungsten carbidesystem tau tsim kho cov txheej txheem los ntawm kev sib txuas nrog thawj txoj ntsiab cai suav nrog lub thermodynamic stability:
Qhov siab tshaj plaws rau kev txiav txim siab tungsten yuav tsum yog WB3 li ntawm 2-d planar boron atoms, tsis yog WB4 muaj li ntawm 3-D peb-dimension boron atom grids.
Nws tau pom tias cov shear modulus nce nrog qhov txo qis ntawm nws txoj kev tsim lub zog hauv cov kab ke ntawm tungsten, qhia tawm tias cov khoom siv lub cev muaj feem cuam tshuam nrog lawv cov thermodynamic ruaj ntseg.
Vim nws qhov tshwj xeeb cov tshuab, hluav taws xob thiab cov khoom sib nqus, tungsten boride tau muaj kev txaus siab hauv kev tshawb fawb yooj yim thiab siv cov khoom siv science.
Vim tias qhov tsis tshua muaj qhov sib txawv ntawm qhov sib txawv ntawm WB, tam sim no, cov hluavtaws ntom ntom ntom ntom ntom zom zaws yog feem ntau ua tiav los ntawm sintering hauv qab qhov kub thiab siab. Ntawm qhov tod tes, vim hais tias B evaporates ntawm qhov kub. Yog li, nws ncaj qha kev npaj ntawm WB thaiv cov khoom siv nrog tungsten hmoov thiab boron hmoov yog qhov nyuaj los tswj cov boron cov ntsiab lus, thiab cov qiv nyiaj tsawg (xws li W2B) yuav tsim nyob rau hauv cov txheej txheem sintering, yog li ntom cov khoom siv nrog WB ua lub ntsiab theem tsis tau tag nrho.
Daim Teb Thov: hnav-resistant txheej thiab semiconductor zaj duab xis rau hnav - tiv taus qhov chaw.

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