Pseudo-binary phase diagram for Zr-based in situ beta phase composites


Lee S. Y., KIM C. P., ALMER J. D., LIENERT U., Ustundag E., JOHNSON W. L.

JOURNAL OF MATERIALS RESEARCH, vol.22, no.2, pp.538-543, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 22 Issue: 2
  • Publication Date: 2007
  • Doi Number: 10.1557/jmr.2007.0066
  • Journal Name: JOURNAL OF MATERIALS RESEARCH
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.538-543
  • Istanbul Technical University Affiliated: No

Abstract

The pseudo-binary (quasi-equilibrium) phase diagram for Zr-based bulk metallic glasses with crystalline in situ precipitates (beta phase) has been constructed from high-temperature phase information and chemical composition analysis. The phase evolution was detected in situ by high-energy synchrotron x-ray diffraction followed by Rietveld analysis of the data for volume fraction estimation. The phase diagram delineates phase fields and allows the control of phase fractions. Combined with related previous work by the authors, this diagram offers a unique opportunity to control both the morphology and volume of the dendritic beta phase precipitates to enhance the properties of the composites.