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Synthesis and spark plasma sintering of TaC-TaB2nano composites

B. MEHDIKHAN1,2,* , S. R. BAKHSHI2

Affiliation

  1. Department of Materials Engineering, Malek-e-ashtar University of Technology, Isfahan, Iran
  2. Construction and Mining Departmen,t Standard Research Institute, Karaj, Iran

Abstract

In this study, mechanochemcicalprocess(MCP) is applied to synthesize ultrafine TaC powders. In this research, nano powder composite TaC-TaB2 was produced using mixtures of tantalum carbide and boron carbide as raw materials via mechanochemical process.Using fine tantalum carbide/boride composite (TaC-TaB2) powder, monolithic TaC-TaB2 ceramics with a relative densityof 85% was obtained by spark plasma sintering(SPS) at 1900˚C and 30 Mpa pressure for 10 min. It is considered that the small particle size of TaCTaB2 powder is important factor for preparing dense TaC-TaB2 ceramics with fine microstructure.The phase formation characterization during synthesis process of powders and sintered samples were utilized by X-ray diffractometry (XRD). The morphology of samples after SPS was studied using field emission scanning electron microscopy (FE-SEM)..

Keywords

Mechanochemcicalprocess(MCP), TaC-TaB2 composite, Spark plasma sintering, Density.

Submitted at: Sept. 10, 2013
Accepted at: Nov. 13, 2014

Citation

B. MEHDIKHAN, S. R. BAKHSHI, Synthesis and spark plasma sintering of TaC-TaB2nano composites, Journal of Optoelectronics and Advanced Materials Vol. 16, Iss. 11-12, pp. 1311-1316 (2014)