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

SCRIPTA MATERIALIA

卷:60

Article

Packard, Corinne E.¹  Schroers, Jan²  Schuh, Christopher A.¹ 

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[2] Yale Univ, Dept Mech Engn, New Haven, CT 06520 USA

关键词: Metallic glasses;    Nanoindentation;    High-temperature deformation;    Surface energy;   

DOI  :  10.1016/j.scriptamat.2009.02.056

来源: Elsevier

【 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.

【 授权许可】

Free