Chromium carbide is a ceramic compound that exists in severaldifferent chemical compositions: Cr3C2, Cr7C3,and Cr23C6. Atstandard conditions it exists as a gray solid. It is extremely hardand corrosion resistant. It is also a refractory compound, whichmeans that it retains its strength at high temperatures as well.These properties make it useful as an additive to metal alloys.When chromium carbide crystals are integrated into the surface of ametal it improves the wear resistance and corrosion resistance ofthe metal, and maintains these properties at elevated temperatures.The hardest and most commonly used composition for this purpose isCr3C2.

基本信息

CAS：12012-35-0
中文別名：二碳化三鉻;
英文別名：chromium(2+),methanidylidynechromium;
分子式：C2Cr3
分子量：180.01
質(zhì)量：179.822
Psa：0.0
Logp：0.0034

編號(hào)系統(tǒng)

EINECS號(hào)：234-576-1
MDL號(hào)：MFCD00016041
PubChem號(hào)：24865108

物化性質(zhì)

外觀與性狀：無(wú)氣味的灰色粉末
密度：6.68
沸點(diǎn)：3800oC
熔點(diǎn)：1890oC
穩(wěn)定性：Decompositionwill not occur if used and stored according to specifications.
儲(chǔ)存條件：Store underdry inert gas. Protect from humidity and water. Keep containertightly sealed. Store in cool, dry conditions in well sealedcontainers.

安全信息

危險(xiǎn)品運(yùn)輸編碼：UN3178
危險(xiǎn)類別：4.1
包裝等級(jí)：III

生產(chǎn)方法及用途

用途
它是一種在高溫環(huán)境下具有良好的耐磨、耐腐蝕、抗氧化的高熔點(diǎn)的材料，與鎳鉻合金制得的硬質(zhì)合金顆粒，采用等離子噴涂法，可作為耐高溫、耐磨、耐氧化與耐酸涂層，廣泛用在飛機(jī)發(fā)動(dòng)機(jī)和石油化工機(jī)械器件上，可大大提高機(jī)械的壽命。也常用作硬質(zhì)合金的晶粒細(xì)化劑及其他耐磨、耐腐蝕元件。以Cr3C2為基的金屬陶瓷在高溫下有極優(yōu)異的抗氧化性能。用于碳化鉻陶瓷。粗粒碳化鉻作為熔噴材料在金屬及陶瓷表面形成熔噴覆膜，賦予后者以耐磨、耐熱、耐蝕等性能，廣泛用于飛機(jī)發(fā)動(dòng)機(jī)及石油化工機(jī)械器件上，以大大提高機(jī)械壽命。亦用于噴制半導(dǎo)體膜。