760℃下Pt-Al涂层对DD413合金氧化行为的影响  

Influence of Pt-Al coating on oxidation behavior of DD413 alloy at 760℃

作　　者：王迪 王栋[2] 李凯文[1,2] 王莉 陈立佳[1] WANG Di;WANG Dong;LI Kai-wen;WANG Li;CHEN Li-jia(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China;Shi-Changxu Innovation Center for Advanced Materials,Instiute of Metal Research of Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870 [2]中国科学院金属研究所师昌绪先进材料创新中心,沈阳110016

出　　处：《沈阳工业大学学报》2022年第6期649-653,共5页Journal of Shenyang University of Technology

基　　金：国家自然科学基金项目(51631008,51871210);国家科技重大专项(2017-Ⅵ-0019-0091,2019-Ⅵ-0006-0074);航空发动机及燃气轮机基础科学中心项目(2021-A-Ⅵ-001-002).

摘　　要：为了研究760℃下Pt-Al涂层对DD413合金氧化行为的影响,采用电镀Pt和化学气相渗Al法在基体表面制备单一β-(Ni,Pt)Al相涂层,并对0.5~70 h氧化后的无涂层和Pt-Al涂层试样进行XRD分析、截面形貌观察、截面元素分布和含量分析.结果表明:Pt-Al涂层试样氧化至5 h时,互扩散区与基体界面处出现难熔原子W、Mo、Ta的富集,当氧化至10 h时,界面处出现了TCP相;Pt-Al涂层阻碍Cr原子的扩散,Pt原子促进了Al原子的选择性氧化并形成具有保护作用的Al_(2)O_(3)膜.因此,Pt-Al涂层在760℃下能够提高DD413合金的抗氧化作用.In order to study the influence of Pt-Al coating on the oxidation behavior of DD413 alloy at 760℃,a singleβ-(Ni,Pt)Al phase coating was prepared on the surface of DD413 alloy by Pt electroplating and chemical vapor deposition aluminizing.XRD analysis,section morphology observation,element distribution and content analysis were performed on the uncoated and Pt-Al coating samples after 0.5 h to 70 h oxidation.The results show that W,Mo and Ta are enriched at the interface between the inter-diffusion zone and the substrate after the Pt-Al coating sample has been oxidized for 5 h,while TCP phase appears at the interface when it has been oxidized for 10 h.Pt-Al coating inhibits the diffusion of Cr atoms.Pt promotes selective oxidation of Al to form protective Al_(2)O_(3)film over coating surface.In conclusion,Pt-Al coating can improve the oxidation resistance of DD413 alloy at 760℃.

关 键 词：高温合金 镍基合金 单晶 Pt-Al涂层 β-(Ni Pt)Al相 固溶体 氧化 元素扩散 

分 类 号：TB35[一般工业技术—材料科学与工程]