抄録
Using rod-like ZrB2 powders as starting materials, monolithic ZrB2 ceramics and ZrB2–20 vol % SiC composites were prepared by tape casting and then hot pressing. The obtained ceramic materials demonstrate partial textured microstructure; however, the morphologies of the ZrB2 grains are not in rod-like but equiaxial in the final products. It is the ZrB2 grain growth along the a, b-axis during the hot pressing process that attributes to equiaxial grains instead of rod-like morphology. On the other hand, the textured microstructures might have resulted in strong grain boundaries, which leads to a high flexural strength for monolithic ZrB2 ceramics.
