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材料导报  2021, Vol. 35 Issue (4): 4144-4149    https://doi.org/10.11896/cldb.19100154
  金属与金属基复合材料 |
Ni-Al-Pt粘结层的制备及微观组织演变分析
韩志勇, 卢博文, 王仕成
中国民航大学天津市民用航空器适航与维修重点实验室,天津 300300
Preparation and Microstructure Evolution of Ni-Al-Pt Bond Coatings
HAN Zhiyong, LU Bowen, WANG Shicheng
Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin 300300, China
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摘要 使用大气等离子喷涂技术制备NiAl粘结层,采用最优工艺在NiAl粘结层上电镀Pt层,并对其进行真空扩散,制备出性能优良的Ni-Al-Pt改性粘结层。本工作研究了喷丸、扩散时间和温度等工艺参数对Ni-Al-Pt粘结层微观形貌及化学成分的影响,分析了Ni-Al-Pt粘结层的物相结构和元素分布。此外,计算了Ni-Al-Pt与NiAl粘结层内各元素的平均扩散系数,对粘结层内各元素的扩散行为进行分析。结果表明,喷丸有利于高温下元素的扩散,升温会使扩散深度增大,Kirkendall孔洞减少,延长时间也有助于粘结层厚度增大。Ni-Al-Pt粘结层内主要发生Pt原子与Ni、Al原子的互扩散,形成了γ-(Ni, Pt)和(Ni, Pt)3Al固溶体。Pt原子的固溶在阻碍Ni扩散的同时促进了Al的扩散,增强了粘结层的抗氧化性。
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韩志勇
卢博文
王仕成
关键词:  Ni-Al-Pt  微观形貌  化学成分  物相结构  元素扩散    
Abstract: The NiAl bond coatings were prepared by atmospheric plasma spraying technology. Then Pt was electroplated on the NiAl bond coatings and vacuum diffusion was performed to prepare the Ni-Al-Pt modified bond coatings with excellent performance. The effects of process parameters such as shot peening, diffusion time and temperature on the morphology and chemical composition of Ni-Al-Pt bond coatings were studied. The phase structure and element distribution of Ni-Al-Pt bond coatings were analyzed. In addition, the average diffusion coefficients of the elements in the Ni-Al-Pt and NiAl bond coatings were calculated, and the diffusion behavior of each element in the bond coatings was analyzed. We found that, shot peening facilitates the diffusion of elements at high temperatures, increasing the temperature will increase the diffusion depth and reduce the Kirkendall hole, extended time also contributes to increased thickness of the bond coatings. The interdiffusion of Pt with Ni and Al occurs mainly in the Ni-Al-Pt bond coatings, formed solid solution of γ-(Ni, Pt) and (Ni, Pt)3Al. The solid solution of Pt promotes the diffusion of Al while hindering the diffusion of Ni, and increases the oxidation resistance of the bond coatings.
Key words:  Ni-Al-Pt    microstructure    chemical composition    plase structure    elemental diffusion
               出版日期:  2021-02-25      发布日期:  2021-02-23
ZTFLH:  TG154. 5  
基金资助: 国家自然科学基金(U1933124)
通讯作者:  zyhan@cauc.edu.cn   
作者简介:  韩志勇,2004年在北京科技大学材料学院获得博士学位后于中国民航大学工作至今。主要研究方向是材料界面结构与性能,主要从事理论计算与性能分析。主持参与国家自然科学基金项目4项,民航局项目1项。发表论文30余篇,其中SCI、EI检索10余篇。
引用本文:    
韩志勇, 卢博文, 王仕成. Ni-Al-Pt粘结层的制备及微观组织演变分析[J]. 材料导报, 2021, 35(4): 4144-4149.
HAN Zhiyong, LU Bowen, WANG Shicheng. Preparation and Microstructure Evolution of Ni-Al-Pt Bond Coatings. Materials Reports, 2021, 35(4): 4144-4149.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.19100154  或          http://www.mater-rep.com/CN/Y2021/V35/I4/4144
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