High Temperature Oxidation Resistance and Degradation Mechanism of Al-Si Coatings on Nickel-Based Superalloy at 1000.

doi:10.12442/j.issn.1002-185X.20230042

IMR OpenIR

	High Temperature Oxidation Resistance and Degradation Mechanism of Al-Si Coatings on Nickel-Based Superalloy at 1000.
	Ma Dezheng 1; Fan Qixiang 1; Wang Tiegang 1; Zhang Chao 3; Yu Haojun 2
通讯作者	Fan Qixiang(qxfan@tute.edu.cn)
	2024-02-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	53 期号:2 页码:509-519
摘要	Si-modified NiAl coating has been studied by researchers due to its good performance in high temperature corrosive environment, but the effect of Si content on the high temperature oxidation resistance of the aluminide coatings has been seldom studied. To figure out this issue, three modified NiAl coatings with different Si contents were prepared by varying the Si contents 8wt%, 17wt% and 30 wt% in the slurry. Phase structures and microstructures of the simple NiAl coatings and three Si-modified NiAl coatings before and after oxidation were analyzed by XRD, SEM and EPMA, etc. The results show that the delta-Ni2Al3 and ss-NiAl are the primary phases of the four aluminide coatings. Si mainly locates in the upper zone of the Si-modified NiAl coatings in the form of silicides as CrSi2, Cr5Si3 and Ni2Si. After oxidation at 1000. for 500 h, the simple NiAl coating has the maximum mass gain of 1.93 mg/cm(2), while the Si-modified NiAl coating with Si content of 8wt% has the smallest mass gain. The dopant of Si into NiAl coatings can promote the formation of protective alpha-Al2O3 film, retard the outward diffusion of refractory metal elements and improve the surface quality of the oxide film, resulting in reduced oxidation rate. However, the addition of Si reduces the Al content on the surface layer of the coating and may make the coating insufficient of ss phase to maintain the selective oxidation of Al in the later period of long- time oxidation. Therefore, when the Si content is 8wt%, the Si-modified NiAl coating possesses the best oxidation resistance.
关键词	slurry method Al-Si coating high temperature oxidation structure
DOI	10.12442/j.issn.1002-185X.20230042
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001253249500021
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/188032
专题	中国科学院金属研究所
通讯作者	Fan Qixiang
作者单位	1.Tianjin Univ Technol & Educ, Tianjin Key Lab High Speed Cutting & Precis Machi, Tianjin 300222, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.703 Res Inst CSSC, Harbin 150078, Peoples R China
推荐引用方式 GB/T 7714	Ma Dezheng,Fan Qixiang,Wang Tiegang,et al. High Temperature Oxidation Resistance and Degradation Mechanism of Al-Si Coatings on Nickel-Based Superalloy at 1000.[J]. RARE METAL MATERIALS AND ENGINEERING,2024,53(2):509-519.
APA	Ma Dezheng,Fan Qixiang,Wang Tiegang,Zhang Chao,&Yu Haojun.(2024).High Temperature Oxidation Resistance and Degradation Mechanism of Al-Si Coatings on Nickel-Based Superalloy at 1000..RARE METAL MATERIALS AND ENGINEERING,53(2),509-519.
MLA	Ma Dezheng,et al."High Temperature Oxidation Resistance and Degradation Mechanism of Al-Si Coatings on Nickel-Based Superalloy at 1000.".RARE METAL MATERIALS AND ENGINEERING 53.2(2024):509-519.