Table of Contents
ISRN Ceramics
Volume 2012 (2012), Article ID 341285, 10 pages
http://dx.doi.org/10.5402/2012/341285
Research Article

Effect of Excess Silicon on the Formation of Ti3SiC2 Using Free Ti/Si/C Powders Synthesized via Arc Melting

School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Penang, 14300 Nibong Tebal, Malaysia

Received 12 November 2012; Accepted 28 November 2012

Academic Editors: S. Marinel, W.-C. Oh, and P. Valerio

Copyright © 2012 Mohamad Johari Abu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The aim of this study is to investigate the effect of excess silicon on the formation of from free Ti/Si/C powders synthesized via arc melting. The reactant mixture was prepared according to the off-stoichiometric ratio of 3Ti : ()Si : 2C, where (excess Si) varied from 0 to 0.5. Samples were analyzed using X-ray diffractometry (XRD), field-emission scanning electron microscopy (FESEM), and energy-dispersive spectroscopy (EDS). The relative density and porosity of products were calculated using the Archimedes method. Through optimization of the arcing schedules (time) and excess Si amounts, 86.9 wt% of with a relative density of 86% was obtained. For all products, was identified as the main phase, while TiC, , and were identified as secondary phases. grains were in the form of elongated platelets; they were nucleated and grew on the surface of equiaxed TiC grains. The microporosity present in the TiC-equiaxed grains affected the density and porosity of the products.