[1]孟国辉,齐浩雄,杜撰,等.化学气相沉积铝化物涂层组织结构及形成机制[J].中国材料进展,2025,44(03):275-281.[doi:10.7502/j.issn.1674-3962.202306014]
　MENG Guohui,QI Haoxiong,DU Zhuan,et al.Microstructure and Formation Mechanism of Chemical Vapor Deposition Aluminide Coating[J].MATERIALS CHINA,2025,44(03):275-281.[doi:10.7502/j.issn.1674-3962.202306014]
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化学气相沉积铝化物涂层组织结构及形成机制()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
44
期数:
2025年03
页码:
275-281
栏目:
出版日期:
2025-03-28

文章信息/Info

Title:
Microstructure and Formation Mechanism of Chemical Vapor Deposition Aluminide Coating
文章编号:
1674-3962(2025)03-0275-07
作者:
孟国辉; 齐浩雄; 杜撰; 刘梅军; 杨冠军; 吴勇; 孙清云; 夏思瑶; 董雪
1. 西安交通大学 金属材料强度国家重点实验室，陕西 西安 710049 2. 武汉材料保护研究所有限公司，湖北 武汉 430030
Author(s):
MENG Guohui;  QI Haoxiong;  DU Zhuan;  LIU Meijun;  YANG Guanjun; WU Yong;  SUN Qingyun;  XIA Siyao;  DONG Xue
1. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China 2. Wuhan Material Protection Research Institute Co., Ltd., Wuhan 430030, China
关键词:
镍基高温合金; 化学气相沉积; 铝化物涂层; 微观组织结构; 热力学
Keywords:
nickel-based superalloy;  chemical vapor deposition;  aluminide coating; microstructure;  thermodynamic
分类号:
TG174.4
DOI:
10.7502/j.issn.1674-3962.202306014
文献标志码:
A
摘要:
提高铝化物涂层抗高温氧化和耐热腐蚀性能的关键在于明确铝化物涂层的微观组织结构及形成机制。采用化学气相沉积法在镍基高温合金Mar-M-247表面制备了铝化物涂层。结合材料热力学模拟软件JMatPro和扫描电子显微镜表征并分析了铝化物涂层的微观组织结构及形成机制。结果表明，Mar-M-247高温合金表面生成的铝化物涂层具有双层结构，外层由单一的β-NiAl相组成，内层主要由β-NiAl相、σ相和μ相组成。铝化物涂层的外层β-NiAl相是Mar-M-247高温合金大量Ni元素外扩散至合金表面，与环境中的Al元素反应生成的。从而使得高温合金中的γ-Ni相和γ′-Ni3Al相含量减少。当Ni元素的体积分数分别降低至55%，52%和38%时，高温合金中顺序析出μ相、β-NiAl相和σ相。最终，当高温合金中Ni元素的体积分数降低至32%时，高温合金完全转变为由βNiAl相、σ相、μ相和少量碳化物相MC组成的铝化物内层。
Abstract:
The key to improve the resistance of aluminide coatings to high temperature oxidation and hot corrosion is to clarify the microstructure and formation mechanism of aluminide coatings. In this study, the aluminide coating was deposited on the surface of nickelbased superalloy Mar-M-247 by chemical vapor deposition. The microstructure and formation mechanism of aluminide coating were characterized and analyzed by using the material thermodynamics simulation software JMatPro and scanning electron microscope. The results showed that the aluminide coating on the surface of Mar-M-247 superalloy had a double layer structure, the outer layer consisted of a single β-NiAl phase, and the inner layer was mainly composed of β-NiAl phase, σ phase and μ phase. A large amount of Ni in Mar-M-247 superalloy diffused outwards to the surface of the alloy and reacted with Al in the environment to form the β-NiAl phase of outer layer of the aluminide coating. The contents of γ-Ni phase and γ-Ni3Al phase in superalloy were reduced due to the large outward diffusion of Ni element. When the volume fraction of Ni elements in the superalloy is reduced to 55%, 52% and 38%, respectively, the μ phase, β-NiAl phase and σ phase are sequentially precipitated in the superalloy. Finally, when the volume fraction of Ni in the superalloy is reduced to 32%, the superalloy is completely transformed into the inner layer of aluminide coating composed of β-NiAl, σ phase, μ phase and a small amount of carbide phase MC.

备注/Memo

备注/Memo:
收稿日期：2023-06-20修回日期：2023-12-25 基金项目：国家重点研发计划项目（2020YFB2010403）；湖北省重点研发计划项目（2021BAA210） 第一作者：孟国辉，男，1991年生，助理教授 通讯作者：刘梅军，男，1987年生，副教授，博士生导师， Email: liumjun@xjtu.edu.cn
更新日期/Last Update: 2025-02-26