CAS号:12012-35-0
品名:碳化铬Chromiumcarbide
中文别名:二碳化三铬;
英文别名:chromium(2+),methanidylidynechromium;
分子式:C2Cr3
分子量:180.01
精确质量:179.822
Psa:0.0
EINECS号:234-576-1
MDL号:MFCD00016041
PubChem号:24865108
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.
危险品运输编码:UN3178
危险类别:4.1
包装等级:III
简介:Chromiumcarbideisaceramiccompoundthatexistsinseveraldifferentchemicalcompositions:Cr3C2,Cr7C3,andCr23C6.Atstandardconditionsitexistsasagraysolid.Itisextremelyhardandcorrosionresistant.Itisalsoarefractorycompound,whichmeansthatitretainsitsstrengthathightemperaturesaswell.Thesepropertiesmakeitusefulasanadditivetometalalloys.Whenchromiumcarbidecrystalsareintegratedintothesurfaceofametalitimprovesthewearresistanceandcorrosionresistanceofthemetal,andmaintainsthesepropertiesatelevatedtemperatures.ThehardestandmostcommonlyusedcompositionforthispurposeisCr3C2.
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。
陶瓷