Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature

doi:10.1007/s40195-022-01407-5

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	Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature
	Rehman, Khalil 1,2; Sheng, Naicheng 2; Fan, Shigang 2; Sun, Shijie 2; Hou, Guicheng 2; Zhou, Yizhou 2; Sun, Xiaofeng 2
刊名	ACTA METALLURGICA SINICA-ENGLISH LETTERS
	2022-04-08
页码	15
关键词	Superalloys Reactive elements Oxidation kinetics Microstructure Spallation resistance
ISSN号	1006-7191
DOI	10.1007/s40195-022-01407-5
通讯作者	Sheng, Naicheng(ncsheng@imr.ac.cn)
英文摘要	Ni-based superalloys added with comparably higher concentrations of single-doped Hf and co-doped Hf/Y are prepared by vacuum induction melting (VIM). The oxidation properties up to 300 h at 900 degrees C, 1000 degrees C, and 1100 degrees C are investigated. The undoped alloy exhibited a minimum oxidation rate at 900 degrees C and 1000 degrees C. The co-doped alloy showed a higher oxidation rate; however, it possesses better scale adhesion, and no spallation occurs. Hf-doped alloy showed a lower oxidation rate and better scale adhesion at 900 degrees C and 1000 degrees C, but exhibited a shorter lifetime at 1100 degrees C. The spallation of the Hf-doped alloy is attributed to the precipitation of the HfO2 in and beneath the oxide scale. The spallation in the undoped alloy is accredited to the thermal expansion mismatch between the growing oxide scale and superalloy substrate. Incorporating two reactive elements (REs) in alloy minimized the precipitation of RE oxide in the oxide scale, diminished internal oxidation in the alloy, and decreased oxide scale spallation.
资助项目	National Natural Science Foundation of China[51971214]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	CHINESE ACAD SCIENCES, INST METAL RESEARCH
WOS记录号	WOS:000781275200001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172972]
专题	金属研究所_中国科学院金属研究所
通讯作者	Sheng, Naicheng
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Rehman, Khalil,Sheng, Naicheng,Fan, Shigang,et al. Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2022:15.
APA	Rehman, Khalil.,Sheng, Naicheng.,Fan, Shigang.,Sun, Shijie.,Hou, Guicheng.,...&Sun, Xiaofeng.(2022).Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature.ACTA METALLURGICA SINICA-ENGLISH LETTERS,15.
MLA	Rehman, Khalil,et al."Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2022):15.