Articles
  • Effect of ZrC additives on the microstructure and hardness of ZrN-ZrSi2 composite

  • Z. I. Zakia,*, S. H. Alotaibib, M. Alsawata and B. A. Alhejjia

  • aDepartment of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
    bDepartment of Chemistry, Turabah University College, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

High-density zirconium nitride ZrN/ZrSi2 composite reinforced with different fractions of insitu formed ZrC were synthesized by dynamic-compaction combustion synthesis from Zr–Si3N4–C powder blends. The effect of ZrC fractions, compression loads, and delay time on the composite properties was investigated. ZrC additives were found to decrease the sample porosity and improve the sample hardness. Increasing the compression load greatly enhanced the sample hardness and reduced the sample porosity. The samples were characterized using XRD, SEM, hardness and porosity. The attained composite having 20 wt% ZrC was found to furnish a highly homogeneous microstructure with less than 1.0 vol open porosity and a maximum hardness value of 1308 HV achieved at 234 MPa compression load


Keywords: Ceramic composites, Zirconium nitride, Zirconium carbide, mechanical properties, Combustion synthesis

This Article

  • 2021; 22(4): 455-460

    Published on Aug 31, 2021

  • 10.36410/jcpr.2021.22.4.455
  • Received on Jan 21, 2021
  • Revised on Apr 25, 2021
  • Accepted on May 14, 2021

Correspondence to

  • Z. I. Zaki

  • Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
    Tel : +966590019562 Fax: +9667272020

  • E-mail: zakimohamed@tu.edu.sa