Investigation of properties W-ZrC composie made of different molar ratio between WC and ZrO2

W-ZrC composite is on of the most important metal matrix composites، because the carbide phase in the composite causing hardness and creep resistance at high temperatures and tungsten flexibility causing resistance to failure of composite. Such as weight of the composite is less than Integrated Tungsten. Various techniques for making composite W-ZrC in the world provided that the choice of method depends on the equipments and the needed properties of the composite. At the present work the properties of W-ZrC composites made from reaction sintering method with different molar WC and ZrO2، were studied، because in this method raw materials are cheap، requires less equipments، and economically affordable sets. In this method، WC and ZrO2 powders with a molar ratio of 3 to 1 and 2 to 1 were mixed in planetary mill. powders formed by uniaxial pressing and final stage after pyrolysis at 600°C، samples in 2200 ◦C have been sintered in a vacuum environment. the XRD pattern and SEM image indicates that the W-ZrC composite has been formed at temperature 2200°C، but some unreacted compounds still exist and some unwanted components have been created. In this method relative density of 91. 09%، and 80. 06 % obtained for the molar ratio of 3:1 and 2:1، respectively. Also it was observed that with increasing temperature، Young's modules increased as for the molar ratio of 3:1 and 2:1، Young's module 254 Gpa and 178Gpa was obtained respectively.