Three-dimensional structure and formation mechanisms of Y2O3 hollow-precipitates in a Cu-based metallic glass

被引：13

作者：

Baulin, Oriane ^{[1
]}

Douillard, Thierry ^{[1
]}

Fabregue, Damien ^{[1
]}

Perez, Michel ^{[1
]}

Pelletier, Jean-Marc ^{[1
]}

Bugnet, Matthieu ^{[1
]}

机构：

[1] Univ Claude Bernard Lyon 1, Univ Lyon, INSA Lyon, UMR CNRS 5510,MATEIS, 20 Ave Albert Einstein, F-69621 Villeurbanne, France

来源：

MATERIALS & DESIGN | 2019年 / 168卷

关键词：

Bulk metallic glasses; Microscopy; Kirkendall effect; Yttrium; Y2O3; precipitates; NANOSCALE KIRKENDALL DIFFUSION; MATRIX COMPOSITES; ZR-TI; FORMING ABILITY; YTTRIUM; PLASTICITY; DEFORMATION; NANOSPHERES; IMPROVEMENT; ADDITIONS;

D O I：

10.1016/j.matdes.2019.107660

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Recently, the high ductility of Cu-based bulkmetallic glasses (BMGs) has been directly linked to the presence of Y2O3 precipitates, and surrounding crystallized areas. Nevertheless, the formation of the precipitates remains to be defined. In this work, the structure of Y2O3 precipitates and crystallized zones of the BMG are investigated at the nanoscale in three-dimensions, shining light on their spatial distribution and their origin. Two kinds of precipitateswere observed: small solid ones and large hollowones. Themechanismproposed to explain the formation of hollow-precipitates is based on the Kirkendall effect. Amodelwas implemented to assess the feasibility of this mechanismwith the experimental results. Moreover, our results suggest that micro and nano-crystallized areaswithin the BMG are induced by the presence of yttria precipitates, with a correspondence between the size of the precipitate and the size of the crystallized areas. (c) 2019 The Authors. Published by Elsevier Ltd.

引用

页数：8

共 53 条

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