化合物简介
Chromium carbide is a ceramic compound that exists in several different chemical compositions: Cr3C2, Cr7C3,and Cr23C6. At standard conditions it exists as a gray solid. It is extremely hard and corrosion resistant. It is also a refractory compound, which means 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 a metal it improves the wear resistance and corrosion resistance of the metal, and maintains these properties at elevated temperatures. The hardest and most commonly used composition for this purpose is Cr3C2.
基本信息
中文名称
碳化铬
英文名称
Chromium carbide
中文别名
二碳化三铬
英文别名
chromium(2+),methanidylidynechromium
CAS号
12012-35-0
分子式
C2Cr3
分子量
180.01
精确质量
179.822
PSA
0.0
LOGP
0.0034
编号系统
EINECS号
234-576-1
MDL号
MFCD00016041
PubChem号
24865108
物化性质
外观与性状
无气味的灰色粉末
密度
6.68
沸点
3800ºC
熔点
1890ºC
稳定性
Decomposition will not occur if used and stored according to specifications.
储存条件
Store under dry inert gas. Protect from humidity and water. Keep container tightly sealed. Store in cool, dry conditions in well sealed containers.
安全信息
危险品运输编码
UN3178
危险类别
4.1
包装等级
III
生产方法及用途
用途
它是一种在高温环境下具有良好的耐磨、耐腐蚀、抗氧化的高熔点的材料，与镍铬合金制得的硬质合金颗粒，采用等离子喷涂法，可作为耐高温、耐磨、耐氧化与耐酸涂层，广泛用在飞机发动机和石油化工机械器件上，可大大提高机械的寿命。也常用作硬质合金的晶粒细化剂及其他耐磨、耐腐蚀元件。以Cr3C2为基的金属陶瓷在高温下有极优异的抗氧化性能。用于碳化铬陶瓷。粗粒碳化铬作为熔喷材料在金属及陶瓷表面形成熔喷覆膜，赋予后者以耐磨、耐热、耐蚀等性能，广泛用于飞机发动机及石油化工机械器件上，以大大提高机械寿命。亦用于喷制半导体膜。
