Abstract
The hybrid composites with different ratios of SiC w and SiC p (SiC w : SiC p=1:1, 1:2, and 1:3) were fabricated by the powder-metallurgy route and were solution treated followed by aging treatment. Mechanical properties of the hybrid composites reinforced with both SiC whiskers (SiC w) and SiC particles (SiC p) were investigated. The peak aging time for the hybrid composites was determined from the measurement of matrix hardness. Accelerated aging occurred in the hybrid composites and the peak aging time (∼5 h) was similar in all the hybrid composites. The hybrid composite with SiC w : SiC p=1:1 showed the highest ultimate tensile strength. The work hardening rate of under-aged hybrid composite with SiC w : SiC p=1:1 was higher than that of over-aged one.
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