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The effect of size on the elastic strain limit in Ni60Nb40 glassy films
被引:28
作者:
Jiang, Q. K.
[1
,2
]
Liu, P.
[3
,4
]
Cao, Q. P.
[1
,2
]
Wang, C.
[1
,2
]
Li, X. L.
[5
]
Gao, X. Y.
[5
]
Wang, X. D.
[1
,2
]
Zhang, D. X.
[6
]
Han, X. D.
[3
]
Zhang, Z.
[1
,2
,7
]
Jiang, J. Z.
[1
,2
,7
]
机构:
[1] Zhejiang Univ, ICNSM, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, Dept Mat Sci & Engn, Lab New Struct Mat, Hangzhou 310027, Peoples R China
[3] Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China
[4] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[5] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China
[6] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China
[7] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Metallic glasses;
Thin films;
Elastic properties;
Size effect;
Free volume;
BULK METALLIC-GLASS;
PLASTICITY;
DEFORMATION;
COMPRESSION;
STRENGTH;
STATE;
FLOW;
D O I:
10.1016/j.actamat.2013.04.053
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
On small-sized Ni60Nb40 magnetron-sputtered glassy films confined by frame, we experimentally revealed a significant size effect on the elastic strain limits by in situ transmission electron microscopy observations. Ni60Nb40 glassy films with thicknesses of 50, 100 and 200 nm exhibit elastic strain limits of 6.5-6.6%, 4.7-4.9% and 3.5-3.6%, respectively. No effects of changing length or width, or the ratio of width or length to thickness on the elastic strain limit are detected in the studied ranges. The size effect could be attributed to different open volumes in the magnetron-sputtered Ni60Nb40 films with various thicknesses, indicating that controlling the open volumes might be a useful way to tailor the properties of metallic glassy materials. The current findings provide a new way to understand the tensile deformation behavior of metallic glasses and supply an effective approach to enhance the elastic strain limit of metallic glasses. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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页码:4689 / 4695
页数:7
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