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中国腐蚀与防护学报  2009, Vol. 29 Issue (1): 1-8    
  研究报告 本期目录 | 过刊浏览 |
TiAl合金表面抗高温氧化涂层研究
王东生1;2;田宗军1;2;陈志勇2;沈理达2;吴红艳3;张平则3;刘志东1;2;徐重3;黄因慧3
1.南京航空航天大学  江苏省精密与微细制造技术重点实验室 南京 210016
2.南京航空航天大学机电学院  南京  210016
3.南京航空航天大学材料科学与技术学院  南京  210016
HIGH-TEMPERATURE OXIDATION RESISTANCE COATINGS ON TiAl ALLOY SURFACE
WANG Dongsheng1;2; TIAN Zongjun1;2; CHEN Zhiyong2; SHEN Lida2; WU Hongyan3; ZHANG Pingze3;LIU Zhidong1;2;XU Zhong3; HUANG Yinhui1;2  
1.Jiangsu Key Laboratory of Precision and Micro--Manufacturing Technology; Nanjing University of Aeronautics and Astronautics; Nanjing 210016
2.College of Mechanical and Electrical Engineering; Nanjing University of Aeronautics and Astronautics; Nanjing 210016
3.School of Materials Science and Technology; Nanjing University of Aeronautics and Astronautics; Nanjing 210016
全文: PDF(3111 KB)  
摘要: 

研究了TiAl合金表面双层辉光离子渗Cr层、等离子喷涂以及激光重熔MCrAlY 涂层在850 ℃的循环氧化行为。用扫描电镜(SEM)、能谱仪(EDS)、辉光放电光谱分析仪(GDS)和X射线衍射仪(XRD)分析了涂层氧化前后的表面形貌、微观组织和相组成。结果表明,渗Cr层组织均匀、致密,且与TiAl合金基体为梯度冶金结合;经过激光重熔处理后,等离子喷涂MCrAlY层的片层状组织得以消失,致密性提高;几种涂层均不同程度地提高了TiAl合金的抗高温氧化性能,其中渗Cr层在氧化初期表现出较好的抗氧化性能,但在长期循环氧化过程中存在局部氧化层剥落现象,等离子喷涂MCrAlY层能显著提高TiAl 合金的抗高温氧化性能,经过激光重熔后可进一步提高其抗高温氧化性能。

关键词 TiAl合金双层辉光离子渗Cr激光重熔等离子喷涂MCrAlY涂层抗高温氧化性能    
Abstract

The behaviours of double glow plasma surface chromized layers, plasma-sprayed and laser--remelted MCrAlY coatings on the cyclic oxidation resistance of a TiAl alloy were researched in air at 850 ℃. The surface morphology, microstructure and phases of the coatings before and after oxidation were investigated using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), glow discharge spectrometer (GDS) and X-ray diffractometry (XRD). The results show that the chromized layer was uniform, dense and had a well gradient metallurgical bonding with TiAl substrate. The MCrAlY coating prepared by plasma-spraying had a higher porosity and showed lamellar structure, which were eliminated after laser remelting. All the coatings improved the oxidation resistance of TiAl alloy very effectively. The chromized layer showed good oxidation resistance in the early stage of oxidation, while the oxide scale partially peels off in the long--term cyclic oxidation process. The MCrAlY coatings had better oxidation resistance during the long-term cyclic oxidation process. The plasma-spayed MCrAlY coating had better oxidation resistance than the TiAl alloy, and the laser-remelted coating had the best oxidation resistance among the coatings.

Key wordsTiAl alloy    double glow plasma surface chromizing    laser remelting    plasma spraying    MCrAlY coating    high-temperature oxidation resistance
收稿日期: 2008-07-28     
ZTFLH: 

TG174

 
基金资助:

国家自然科学基金资助项目(59975046);江苏省自然科学基金重点资助项目(BK2004005)

通讯作者: 田宗军     E-mail: tianzj@nuaa.edu.cn
Corresponding author: TIAN Zongjun      E-mail: tianzj@nuaa.edu.cn

引用本文:

王东生 田宗军 陈志勇 沈理达 吴红艳 张平则 刘志东 徐重 黄因慧. TiAl合金表面抗高温氧化涂层研究[J]. 中国腐蚀与防护学报, 2009, 29(1): 1-8.
YU Dong-Sheng, TIAN Zong-Jun, CHEN Zhi-Yong, CHEN Li-Ta, WU Hong-Yan, ZHANG Beng-Ze, LIU Zhi-Dong, XU Tong, HUANG Yin-Hui. HIGH-TEMPERATURE OXIDATION RESISTANCE COATINGS ON TiAl ALLOY SURFACE. J Chin Soc Corr Pro, 2009, 29(1): 1-8.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2009/V29/I1/1

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