Understanding of failure mechanisms of the oxide scales formed on nanocrystalline coatings with different Al content during cyclic oxidation

doi:10.1016/j.actamat.2020.116576

CORC > 金属研究所 > 中国科学院金属研究所

	Understanding of failure mechanisms of the oxide scales formed on nanocrystalline coatings with different Al content during cyclic oxidation
	Yang, Shasha 2,3; Yang, Lanlan 4; Chen, Minghui 1; Wang, Jinlong 1; Zhu, Shenglong 3; Wang, Fuhui 1
刊名	ACTA MATERIALIA
	2021-02-15
卷号	205 页码:13
关键词	Oxidation Nanocrystalline coatings Rumpling Thermal stress
ISSN号	1359-6454
DOI	10.1016/j.actamat.2020.116576
通讯作者	Chen, Minghui(mhchen@mail.neu.edu.cn)
英文摘要	Cyclic oxidation behaviors of three nanocrystalline coatings with phase constitutions of gamma/gamma', single. gamma', and. gamma/beta, respectively, tailored by adjusting the Al content, are investigated. The oxide scale on gamma/gamma' coating exhibits serious surface rumpling accompanied by frequently cracking at the crests of undulations after 500 cycles at 1100 degrees C. The premature degradation of the coating in microstructure (i.e. gamma' phase dissolution and concurrent grain coarsening), arising from high oxidation rate and low original Al content, not only increases its CTE to introduce larger thermal stress, but also decreases its hardness and elastic modulus, making it susceptible to rumpling and further inducing cracking of oxide scale. Comparatively, benefited from lower oxidation rate and higher Al content, the degradation of. gamma' and gamma'/beta coatings is less significant. They are subjected to lower thermal stress but possess higher deformation resistance during cycling. However, local spallation of the oxide scale occurs on. gamma'/beta coating since it is insusceptible to rumpling and thus the thermal stress is difficult to release in time by plastic deformation. The. ' coating outperforms its counterparts of gamma/gamma', and gamma'/beta coatings, presenting low oxidation rate, high resistance to scale cracking and spallation, meanwhile, limited elements-interdiffusion with the underlying substrate. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. Allrights reserved.
资助项目	National Natural Science Foundation of China[51671053] ; National Natural Science Foundation of China[51801021] ; Ministry of Industry and Information Technology Project[MJ-2017-J-99]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000609936600041
资助机构	National Natural Science Foundation of China ; Ministry of Industry and Information Technology Project
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/159120]
专题	金属研究所_中国科学院金属研究所
通讯作者	Chen, Minghui
作者单位	1.Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Peoples R China 2.Univ Sci & Technol China, Coll Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 4.Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Yang, Shasha,Yang, Lanlan,Chen, Minghui,et al. Understanding of failure mechanisms of the oxide scales formed on nanocrystalline coatings with different Al content during cyclic oxidation[J]. ACTA MATERIALIA,2021,205:13.
APA	Yang, Shasha,Yang, Lanlan,Chen, Minghui,Wang, Jinlong,Zhu, Shenglong,&Wang, Fuhui.(2021).Understanding of failure mechanisms of the oxide scales formed on nanocrystalline coatings with different Al content during cyclic oxidation.ACTA MATERIALIA,205,13.
MLA	Yang, Shasha,et al."Understanding of failure mechanisms of the oxide scales formed on nanocrystalline coatings with different Al content during cyclic oxidation".ACTA MATERIALIA 205(2021):13.