Fcc solid solution alloy films formed in immiscible Fe-Ag system and their mechanical behaviors

被引：7
作者：
Zong, R. L.
Wen, S. P.
Zeng, F.
Gao, Y.
Song, C.
He, B.
Pan, F. [1 ]
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, Adv Mat Lab, Beijing 100084, Peoples R China
[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2007年 / 253卷 / 06期
关键词：
Fe-Ag alloy; solid solution; XANES; mechanical behavior;
D O I：
10.1016/j.apsusc.2006.06.025
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Fe-Ag alloy films were deposited by magnetron sputtering. Fe K edge X-ray absorption near-edge structure (XANES) was performed by synchrotron radiation to evidence the structure of the films. Annealing experiments were carried out to study their stability. The hardness and elastic modulus were measured by nanoindentation. The experimental and calculated XANES spectra both reveal that Fe atoms replace part of Ag atoms and supersaturated fcc Ag (Fe) solid solution alloy films are formed up to 38 at.% Fe. The solid solutions are stable and begin to precipitate at 400 degrees C The elastic modulus increases with the increase of Fe concentration and satisfies the rule of mixtures. The hardness of the as-deposited alloy film is larger than that calculated based on the rule of mixtures. The mechanism responsible for the enhancement of the hardness is discussed in terms of Labusch model of solid solution hardening. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：2993 / 2998
页数：6
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