Promoting direct formation of a single α-Al2O3 scale on a silicon-aluminizing coating on TiAl alloys by a novel fluorination method

doi:10.1016/j.jmrt.2025.03.007

IMR OpenIR

	Promoting direct formation of a single α-Al2O3 scale on a silicon-aluminizing coating on TiAl alloys by a novel fluorination method
	Zhao, Feng 1,2; Cui, Xinyu 1; Xiong, Tianying 1; Wang, Jiqiang 1
通讯作者	Wang, Jiqiang(jqwang11s@imr.ac.cn)
	2025-03-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	35 页码:6211-6225
摘要	Metastable 0-Al2O3 rather than stable alpha-Al2O3 scale is preferentially formed during oxidation between 850 degrees C and 1000 degrees C, which decrease the long-term service life of the coating. In this study, a novel method for promoting the formation of single alpha-Al2O3 through the fluorination modification of a silicon-aluminizing coating on TiAl alloys was proposed. The results indicated that fluorination resulted in notable differences in the oxidation behavior of the coatings. The unfluorinated silicon-aluminizing coating predominantly formed needle-like 0-Al2O3 during the initial oxidation stage while the fluorinated silicon-aluminizing coating facilitated the direct formation of granular alpha-Al2O3 at the initial oxidation stage. The alpha-Al2O3 scale with high thermal stability and good adhesion significantly improved the long-term service life of the coatings. This provides a novel strategy for improving the life of this high-temperature protective coating with alumina as protective scale.
关键词	alpha-Al 2 O 3 scale Fluorination Silicon-aluminizing coating High temperature oxidation Formation mechanism
资助者	National Natural Science Foundation of China ; Youth Innovation Promotion Association ; Chinese Academy of Sciences (CAS)
DOI	10.1016/j.jmrt.2025.03.007
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52271078] ; Youth Innovation Promotion Association[2023199] ; Chinese Academy of Sciences (CAS)
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001439969000001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/179872
专题	中国科学院金属研究所
通讯作者	Wang, Jiqiang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Feng,Cui, Xinyu,Xiong, Tianying,et al. Promoting direct formation of a single α-Al2O3 scale on a silicon-aluminizing coating on TiAl alloys by a novel fluorination method[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2025,35:6211-6225.
APA	Zhao, Feng,Cui, Xinyu,Xiong, Tianying,&Wang, Jiqiang.(2025).Promoting direct formation of a single α-Al2O3 scale on a silicon-aluminizing coating on TiAl alloys by a novel fluorination method.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,35,6211-6225.
MLA	Zhao, Feng,et al."Promoting direct formation of a single α-Al2O3 scale on a silicon-aluminizing coating on TiAl alloys by a novel fluorination method".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 35(2025):6211-6225.