碳化铬/Ni_3Al复合材料的高温抗氧化性能  

High-Temperature Oxidation Resistance of Chromium Carbide/Ni_3Al Composite

作　　者：骆合力[1] 李尚平[1] 冯涤[1] 曹栩[1] 张喜娥[1] 

机构地区：[1]钢铁研究总院高温材料研究所,北京100081

出　　处：《航空材料学报》2007年第2期37-41,共5页Journal of Aeronautical Materials

基　　金：国家高技术研究发展计划资助项目(2002AA331070)

摘　　要：对比研究碳化铬/Ni3Al复合材料和传统高温耐磨材料Stellite 12合金在1000℃时的高温氧化行为。结果表明,Stellite 12合金表面形成以Cr2O3为主的氧化膜,并发生明显剥落;而碳化铬/Ni3Al复合材料表面形成以α-Al2O3为主的致密氧化膜,其空气中的氧化速率仅为Stellite 12合金的1/2,碳化铬具有良好的抗氧化稳定性并与Ni3Al基体有较好的氧化协同性。分析认为,碳化铬在堆焊过程中发生溶解导致部分Cr固溶于Ni3Al合金基体中,促进α-Al2O3的形成,从而改善复合材料的抗氧化性。而材料表面所形成的氧化膜类型是两种材料抗氧化性差异的主要原因。The oxidation resistance of chromium carbide/Ni3Al composite and conventional high temperature wear-resistant material stellite 12 alloy at 1000℃ was investigated comparatively. For stellite 12 alloy, the oxides scale mainly consisted of Cr2O3 , and some of them scaled off the alloy. For chromium carbide/Ni3Al, the protective oxides that mainly consisted of α-Al2O3 were formed and the chromium carbides exhibited good anti-oxidation stability and oxidation synergism with Ni3 Al matrix. The analyse showed that the chromium carbides were dissolved during welding and some dissolved Cr enter into Ni3 Al matrix. The existence of Cr promotes or-Al2 O3 formation, which improved the oxidation resistance of the composite obviously. The oxidation rate of the stellite 12 alloy was two times greater than that of the composite in air. The different oxidation behavior of two materials was mainly attributed to different oxides scale characters.

关 键 词：NI3AL 碳化铬 复合材料 氧化 

分 类 号：TB333[一般工业技术—材料科学与工程]