Thermodynamic, corrosion and mechanical properties of Zr-based bulk metallic glasses in relation to heterogeneous structures

W. H. Li, Kang Cheung Chan, L. Xia, L. Liu, Y. Z. He

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

In this paper, Zr64.2Ni16.2Cu14.6Al5and Zr63.4Ni16.2Cu15.4Al5BMGs with heterogeneous structures were prepared through copper mold casting. The microstructure, thermal stability and corrosion behavior of the two Zr-based metallic glasses were investigated by X-ray diffraction (XRD), high-resolution transmission electron micrography (HRTEM), differential scanning calorimetry (DSC) and potentiodynamic polarization tests. In TEM micrographs, heterogeneous structures were revealed by the contrast between the bright and dark zones. Compared to the Zr65A10lNi10Cu15BMG with a homogenous structure, the heterogeneous structures of the two BMGs are shown to reduce their thermal stability and corrosion resistance. The two Zr-based BMGs however exhibit large plastic strain (>25%) and high yield strength (>1.6GPa) under uniaxial compression tests. The low potential-energy barrier of shear transition zones (STZs) and the high resistance to the propagation of shear bands of the BMGs are related to the heterogeneous structures.
Original languageEnglish
Pages (from-to)157-162
Number of pages6
JournalMaterials Science and Engineering A
Volume534
DOIs
Publication statusPublished - 1 Feb 2012

Keywords

  • Bulk amorphous alloys
  • Corrosion resistance
  • Plasticity
  • Thermal stability

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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