Si对CoCrAlY涂层抗热腐蚀性能的影响（英文）  

Effect of Si on Hot Corrosion Resistance of CoCrAlY Coating

作　　者：张淑婷[1,2,3] 杜开平 任先京[1] 史记 

机构地区：[1]北京矿冶研究总院,北京100070 [2]特种涂层材料与技术北京市重点试验室,北京102206 [3]北矿新材科技有限公司,北京102206

出　　处：《稀有金属材料与工程》2017年第10期2807-2811,共5页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51201012);International Cooperation Project(2015DFA51530)

摘　　要：采用HVOF技术制备了CoCrAlSiY涂层,用质量分数75%Na_2SO_4+25%NaCl热盐涂敷的方法,对比了不同质量分数Si含量(0%、2%及5%)CoCrAlSiY涂层在900℃下的抗热腐蚀性能。结果表明:随着反应温度升高,涂层的平均腐蚀穿透深度呈增加趋势;随着Si含量上升,涂层的平均腐蚀穿透深度逐渐下降。腐蚀后CoCrAlSiY涂层内生成了高熔点的金属硅化物CrSi,有助于提高涂层的抗腐蚀性能。The CoCrAlSiY coating was prepared by HVOF（high velocity oxygen fuel） method. The hot corrosion resistance of the CoCrAlSiY coating with different Si concentrations（0 wt%, 2 wt% and 5 wt%） at 900℃ was discussed by hot salt coating method with a mixed salt of 75 wt% Na_2SO_4＋25 wt% NaCl. The results show that the average corrosion penetration depth of the coating increases with the rising of temperature, while the increasing of Si concentration decreases the average corrosion penetration depth of the coating. Furthermore, CrSi, a high melting point metal silicide, is generated inside the CoCrAlSiY corrosion coating. Thus it is beneficial for improving the corrosion resistance of the coating.

关 键 词：MCrAlSiY 涂层 氧化 抗热腐蚀 

分 类 号：TG174.4[金属学及工艺—金属表面处理]