Mechanical characteristics of Mg-Cu-Zr thin film metallic glasses

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

6 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)58-61
Journal / PublicationSurface and Coatings Technology
Volume231
Online published27 Mar 2012
Publication statusPublished - 25 Sep 2013
Externally publishedYes

Abstract

For improving the ductility of metallic glasses, nanocrystals within the amorphous matrix are frequently intentionally added. In this study, the MgCuZr thin film metallic glasses (TFMGs) with a positive mixing heat between Mg and Zr are fabricated via co-sputtering in an attempt to separate the pure Mg nano-particles. The microstructure and mechanical properties of the sputtered MgCuZr thin films and their FIB-machined micropillars are examined as a function of Mg content from 39 to 100 at.%. From the nanoindentation and micropillar load-displacement curves, the Mg-rich metallic glass composites exhibit smoother nature and more ductile behavior. Meanwhile, due to strong (0002) basal texture, the Mg-rich thin films and micropillars possess strong modulus (~80 GPa), hardness (~3.5 GPa), and yield stress (~1.5 GPa), coupled with more ductile behavior. All of these would allow promising applications in micro-electro-mechanical systems.

Research Area(s)

  • Crystalline/amorphous laminates, Interface energy, Micro-compression, Shear fracture