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Oxidation feature and diffusion mechanism of Zr-based metallic glasses near the glass transition point
Hu Z(胡铮)1; Lei XQ(雷现奇)2; Wang Y(王洋)3; Zhang K(张坤)3,4; Zhang Kun
Source PublicationMaterials Reaserch Express
2018-03
Volume5Issue:3Pages:036511
ISSN2053-1591
Abstract

The oxidation behaviors of as-cast, pre-deformed, and crystallized Zr47.9Ti0.3Ni3.1Cu39.3Al9.4 metallic glasses (MGs) were studied near the glass transition point. The oxidation kinetics of the crystallized MGs followed a parabolic-rate law, and the as-cast and pre-deformed MGs exerted a typical two-stage behavior above the glass transition temperature (T-g). Most interesting, pre-deformed treatment can significantly improve the oxidation rate of MGs, as the initial oxidation appeared earlier than for the as-cast MGs, and was accompanied by much thicker oxide scale. The EDS and XPS results showed that the metal Al acted as the preferred scavenger that absorbed intrinsic oxygen in the near-surface region of as-cast MGs. However, a homogeneous mixed layer without Al was observed in the pre-deformed MGs. We speculated the accelerated diffusion of other elements in the MGs was due to the local increase in the free volume and significant shear-induced dilation of the local structure. The results from this study demonstrate that MGs exhibit controllable atomic diffusion during the oxidation process, which can facilitate use in super-cooled liquid region applications.

DOI10.1088/2053-1591/aab309
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000427577600001
DepartmentNML空间材料物理力学
ClassificationQ4
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/72259
Collection国家微重力实验室
非线性力学国家重点实验室
Corresponding AuthorZhang Kun
Affiliation1.Science and Technology on Vehicle Transmission Laboratory, China North Vehicle Research Institute, Beijing 100072, People’s Republic of China
2.Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
3.LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China
Recommended Citation
GB/T 7714
Hu Z,Lei XQ,Wang Y,et al. Oxidation feature and diffusion mechanism of Zr-based metallic glasses near the glass transition point[J]. Materials Reaserch Express,2018,5(3):036511.
APA Hu Z,Lei XQ,Wang Y,Zhang K,&Zhang Kun.(2018).Oxidation feature and diffusion mechanism of Zr-based metallic glasses near the glass transition point.Materials Reaserch Express,5(3),036511.
MLA Hu Z,et al."Oxidation feature and diffusion mechanism of Zr-based metallic glasses near the glass transition point".Materials Reaserch Express 5.3(2018):036511.
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