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Strengthening of titanium silicon carbide (Ti 3 SiC 2 ) was investigated by the grain orientation control and silicon carbide (SiC) whisker dispersion. Ti 3 SiC 2 with preferentially oriented grains was prepared by hot-pressing of milled Ti 3 SiC 2 powder. Composites were also fabricated by hot-pressing of a blend of the milled Ti 3 SiC 2 powder and SiC whiskers. During hot-pressing, the preferential orientation of Ti 3 SiC 2 grains was achieved while the precipitation of titanium carbide (TiC) occurred. As a result, 4-point bending strength of preferentially-oriented Ti 3 SiC 2 was approximately 1.5 times the randomly-oriented pure Ti 3 SiC 2 in a temperature range from room temperature to 1073 K. The bending strength of Ti 3 SiC 2 with 15 vol% whiskers reached approximately 1 GPa, approximately 3 times the randomly-oriented pure Ti 3 SiC 2 , in the range to 1073 K. The results in this study indicate that the strengthening effect on Ti 3 SiC 2 was contributed from the orientation control, TiC precipitation and SiC whisker dispersion.

Strengthening of Titanium Silicon Carbide by Grain Orientation Control and Silicon Carbide Whisker Dispersion