In situ measurements of surface tension-driven shape recovery in a metallic glass

被引：28
|
作者：
Packard, Corinne E. [1 ]
Schroers, Jan [2 ]
Schuh, Christopher A. [1 ]
机构：
[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
[2] Yale Univ, Dept Mech Engn, New Haven, CT 06520 USA
来源：
SCRIPTA MATERIALIA | 2009年 / 60卷 / 12期
基金：
美国国家科学基金会;
关键词：
Metallic glasses; Nanoindentation; High-temperature deformation; Surface energy; FORMING ALLOYS; DEFORMATION; NANOINDENTATION; TEMPERATURES; LIQUIDS; MEMS;
D O I：
10.1016/j.scriptamat.2009.02.056
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A new technique, involving nanoindentation and in situ scanning probe microscopy at high temperature under an inert atmosphere, is used to study deformation of a Pt-based metallic glass. As temperature is increased into the supercooled liquid regime, impressions made by nanoindentation flatten due to surface tension-driven viscous flow. In situ measurements of shape recovery at various temperatures and times permit an estimation of the apparent activation energy for Newtonian-viscous flow. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1145 / 1148
页数：4
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