Densification, Microstructural Evolution, Mechanical Properties and Oxidation Study of CrB2 + EuB6 Composite

Research output: Contribution to journalArticlepeer-review

Authors

  • K. Raju
  • J. K. Sonber
  • Murthy Tammana
  • K. Sairam
  • S. Majumdar
  • And 2 others
  • V. Kain
  • G. V.S. Nageswar Rao

Colleges, School and Institutes

External organisations

  • National Institute of Technology Warangal
  • Bhabha Atomic Research Centre
  • Homi Bhabha National Institute, Mumbai

Abstract

This paper reports the results of investigation on densification, microstructural evolution, mechanical properties and oxidation study of CrB2 + EuB6 composite. CrB2 + EuB6 (10 and 20 wt.%) composites have been fabricated by hot pressing at a temperature of 1700 °C and 35 MPa pressure. The hardness and flexural strength were measured in the range of 21.25-24.48 GPa and 171-199 MPa, respectively. The fracture toughness increased from 3.3 to 4.01 MPa m1/2 by the addition of 20% EuB6. Microstructural evolution revealed the uniform distribution of EuB6 and absence of any reaction product. Fracture surface analysis confirmed the presence of transgranular mode of fracture. Oxidation study at 1200 °C revealed that the developed composites have good oxidation resistance and followed the parabolic rate of oxidation.

Details

Original languageEnglish
Pages (from-to)2457-2465
Number of pages9
JournalJournal of Materials Engineering and Performance
Volume27
Issue number5
Early online date12 Apr 2018
Publication statusPublished - 1 May 2018

Keywords

  • CrB, EuB, hot pressing, mechanical properties, microstructure, oxidation