Mostafa Roosta - Iranian Space Research Center, P.O. Box: ۱۴۵۹۷۷۷۵۱۱, Tehran, Iran
Hamidreza Baharvandi - Department of Materials Engineering, MUT, P.O. Box: ۱۳۳۳۶۹۵۷۱۱, Tehran, Iran
Hossein Abdizade - School of Metallurgy and Materials Engineering, University of Tehran, Tehran, Iran

Considering the problems and high cost related to graphite parts, the tendency to use composite materials such as W/ZrC as a suitable substitute has been noticed. In this study the W-ZrC composites fabricated by in situ reaction sintering of two precursors were compared, ۱-The conventional WC and ZrO۲ which are ball milled with established molar ratio of ۳-۱ for ۱۲ hours, gelcasted to form a green body and then undergo a pressure less sintering cycle, ۲-A new and innovative way in which for the first time ZrSiO۴ was used instead of ZrO۲, and by testing different molar ratio between WC and ZrSiO۴ it was understood that the optimum ratio is ۳-۱ once again.

W/ZrC composite, Reaction Sintering, Mechanical property, ZrSiO۴.