Microstructure and composition evolution of a single-crystal superalloy caused by elements interdiffusion with an overlay NiCrAlY coating on oxidation

作     者：Lanlan Yang Minghui Chen Jinlong Wang Yanxin Qiao Pingyi Guo Shenglong Zhu Fuhui Wang Lanlan Yang;Minghui Chen;Jinlong Wang;Yanxin Qiao;Pingyi Guo;Shenglong Zhu;Fuhui Wang

作者机构：School of Materials Science and EngineeringJiangsu University of Science and TechnologyZhenjiang 212003China Shenyang National Laboratory for Materials ScienceNortheastern UniversityShenyang 110819China Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2020年第42卷第10期

页      面：49-58页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China Nos.51671053 and 51801021 the Ministry of Industry and Information Technology Project No.MJ-2017-J-99) 

主　　题：Single-crystal superalloys NiCrAlY coating High-temperature oxidation Arcion plating Elements interdiffusion Microstructure 

摘      要：MCrAlY(M=Ni and/or Co)overlay coating is widely used as a protective coating against high temperature oxidation and ***,due to its big difference in chemical composition with the underlying superalloy,elements interdiffusion occurs *** of the direct results is the formation of interdiffusion zone(IDZ)and secondary reaction zone(SRZ)with a high density of fine topological closed-packed phases(TCPs),weakening dramatically the mechanical properties of the alloy *** is by now the main problem of modern high-temperature metallic coatings,but there are still hardly any reports studying the formation,growth and transformation of IDZ and SRZ in deep,as well as the precipitation of *** this work,a typical NiCrAlY coating is deposited by arc ion plating on a single-crystal superalloy *** interdiffusion between them and its relationship on microstructure were *** rather than Al from the coating diffuses into the alloy at high temperatures and segregates immediately beneath their interface,contributing largely to the formation of ***,diffusion of Ni from the deep alloy to IDZ leads to the formation and continuous expansion of SRZ.