Influences of oxygen on plastic deformation of a Fe-based bulk metallic glass
Influences of oxygen on plastic deformation of a Fe-based bulk metallic glass
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氧对铁基大块金属玻璃塑性变形的影响
DOI：
10.1016/j.scriptamat.2017.03.018
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发表时间：
2017-07-01
影响因子：
6
通讯作者：
Lu, Z. P.
中科院分区：
文献类型：
--
作者：
Li, H. X.;Li, C. Q.;Lu, Z. P.
Fe65Ni17P11.5C6.5块体金属玻璃（BMG）含有不同量的92、181和252 at.研究了氧含量为0.5ppm时的合金在压缩载荷下的变形行为，发现氧含量的增加提高了合金的强度，但显著降低了合金的塑性变形能力。X射线光电子能谱（XPS）的价带谱证实，氧掺杂使材料的原子间键由类s键向p-d杂化键转移，导致材料的压缩塑性降低。研究结果表明，铁基非晶合金的室温脆性与氧杂质浓度密切相关，制备过程必须严格控制。(C)2017 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
Fe65Ni17P11.5C6.5 bulk metallic glasses (BMGs) containing a different amount of 92, 181 and 252 at. ppm oxygen were prepared and their deformation behavior under compressive loading were studied, It was found that the increment of oxygen increased strength but significantly decreased plastic deformation capability. X-ray photoelectron spectrograph (XPS) valence-band spectrum confirmed that oxygen doping tends to transfer interatomic bonds from s-like to p-d hybrid bonds, leading to the lower compressive plasticity. Our findings indicate that room-temperature brittleness of Fe-based BMGs is closely related to the concentration of oxygen impurity and the preparation process has to be carefully controlled. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.