Abstract
In the present work, tungsten carbide (WC) preforms were fabricated by gel-casting process using nontoxic Na-alginate and then reactively infiltrated by molten Zr2Cu to produce W-ZrC composite via displacive compensation of porosity process. An orthogonal array design (OAD) was employed as a statistical experimental method for the fabrication of W-ZrC composites. This paper deals with the analysis of the infiltration parameters such as temperature and time on the microstructures and properties of W-ZrC composites based on Taguchi's experimental design methods. The results of ANOVA showed that infiltration temperature as the most consequential factor affecting the amount of ZrC phase, flexural strength and Vickers hardness. The optimized sample had a flexural strength of 460 ± 4 MPa, Vickers hardness of 9.5 ± 0.4 GPa, relative density of 95.21 ± 1.07 and deflection at the fracture point of 0.19 ± 0.04 mm.
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