真空热处理对多弧离子镀NiCoCrAlY涂层高温氧化行为的影响  

Effect of Vacuum Heat Treatment on Oxidation Behavior of Arc Ion Plated NiCoCrAlY Coatings

作　　者：李玲[1] 杜汐然 曲品权 李建呈 王金龙[1] 古岩 张甲[3] 陈明辉[1] 王福会[1] LI Ling;DU Xiran;QU Pinquan;LI Jiancheng;WANG Jinlong;GU Yan;ZHANG Jia;CHEN Minghui;WANG Fuhui(Shenyang National Key Laboratory for Materials Science,Northeastern University,Shenyang 110819,China;Aero Engine Corporation of China Shenyang Liming aero-engine Co.Ltd.,Shenyang 110043,China;Institute of Metal Research,The Chinese Academy of Sciences,Shenyang 110819,China)

机构地区：[1]沈阳材料科学国家研究中心东北大学联合研究分部,沈阳110819 [2]中国航发沈阳黎明航空发动机有限责任公司,沈阳110043 [3]中国科学院金属研究所,沈阳110819

出　　处：《中国腐蚀与防护学报》2022年第2期243-248,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(51801021和51671053);教育部中央高校基本科研业务费(N2102015);工信部项目(MJ-2017-J-99)。

摘　　要：采用多弧离子镀技术在镍基高温合金上沉积NiCoCrAlY涂层,通过真空热处理消除涂层内部孔洞。研究了950、1000和1050℃热处理后的涂层在1000℃下的氧化实验,以探究最优的热处理温度。采用XRD、SEM和EDS观察分析涂层的物相组成和表截面形貌。结果表明,真空热处理后,基体与涂层结合紧密,氧化增重相对缓慢,涂层表面能形成均匀致密的氧化膜。其中,1000℃下真空热处理的涂层表现出了良好的抗氧化和防剥落性能。MCrAlY coatings are widely used for various parts of high-temperature alloy to enhance their corrosion resistance at high temperatures. However, there still exist unavoidable defects within the as-prepared coating, as well as at the interface coating/substrate, which promotes the initiation of cracking and failure of the coating during service at high temperature, and ultimately limits the service life of the alloy components. In this study, NiCoCrAlY coating was deposited on K417 G high temperature alloy by arc ion plating, and the coated alloy samples was vacuum heat treated at 950, 1000 and 1050 ℃ respectively for 4 h. Further, the oxidation behavior of the heat-treated samples were assessed isothermally at 1000 ℃ in air for a long term so that to examine the effectiveness of vacuum heat treatment. Finally,the surface and cross-sectional morphology and phase composition of the oxidized coating/alloy were characterized by means of XRD, SEM with EDS. The results show that after vacuum heat treatment the plated NiCoCrAlY coating is tightly bonded to the substrate alloy, the oxidation mass gain of the coatings is relatively slow, and a uniform and dense oxide scale can form on their surface. Among others, the sample after heat-treated at 1000°C provides the best performance, which exhibits better resistance to scale spallation with lower mass gain.

关 键 词：MCRALY涂层 高温氧化 真空热处理 多弧离子镀 高温防护涂层 

分 类 号：TG172[金属学及工艺—金属表面处理]