Improving the densification of tungsten carbide by liquid phase sintering

Mariana , Arshad (2015) Improving the densification of tungsten carbide by liquid phase sintering. Project Report. UTeM. (Submitted)

Text IMPROVING THE DENSIFICATION OF TUNGSTEN CARBIDE BY LIQUID PHASE SINTERING.pdf Download (405kB)

Abstract

In this work, the fabrication of tungsten carbide, WC ceramic by using liquid phase sintering (LPS) was investigated to improve the densification. In general, WC requires high temperature to improve its densification. Thus, sintering aid was added to reduce sintering temperature in order to improve densification. In order to tackle this problem, WC-Co was studied with different sintering profiles and parameters. This work studied the effect of composition of Co content, sintering temperature and soaking time which in turn to improve densification. Two composition of Co contents; 3 and 12 wt.% Co are selected. The WC-Co samples were sintered at different sintering temperature in the range of 1200-1400°C. In order to obtain densified sample, the optimum sintering temperature of 1350oC was selected with different soaking times. The characterization and measurement of WC-Co was studied in term of phase formation, elemental analysis, particle size, density and hardness of WC. Based on this work, WC-12 wt.% Co with soaking time of 7 hours showed a good performance in term of high hardness (10.9430x10-6 GPa), high bulk density(11.3103 g/cm3) with uniform microstructure.

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