Sinterability studies of monolithic chromium diboride (CrB2) by spark plasma sintering

Research output: Contribution to journalArticlepeer-review

Authors

  • B. Mahesh
  • K. Sairam
  • J.K. Sonber
  • T.S.R.C. Murthy
  • G.V.S. Nageswara Rao
  • And 2 others
  • T. Srinivasa Rao
  • J.K. Chakravartty

Colleges, School and Institutes

Abstract

Spark plasma sintering (SPS) experiments were conducted to investigate the effect of the processing parameters such as temperature, mechanical pressure and dwell time on densification behavior of monolithic chromium diboride. The sintering experiments were performed at different temperatures ranging from 1100 °C to 1900 °C under the mechanical pressure of 30 MPa–70 MPa for 1 min–15 min duration. The onset temperature for the densification of CrB2 is observed to be 1300 °C at 50 MPa. High dense chromium diboride (98.4%ρth) compact was obtained when processed at 1900 °C under a mechanical pressure of 70 MPa for 15 min duration. Hardness and fracture toughness of high density monolithic CrB2 (98.4%ρth) sample were measured to be 15.89 ± 1.3 GPa and 1.8 ± 0.14 MPa·m1/2 respectively.

Details

Original languageEnglish
Pages (from-to)66-69
Number of pages4
JournalInternational Journal of Refractory Metals and Hard Materials
Volume52
Early online date1 May 2015
Publication statusPublished - Sep 2015

Keywords

  • Chromium diboride, Spark plasma sintering, Density, Microstructure, Hardness, Fracture toughness