Abstract
The nano-grained B,C-SiC was fabricated by hot-isostatic-pressing (HIP) at ultra-high-pressure. The average grain size of the SiC was 200 nm and the superplastic elongation over 100% was exhibited in tensile deformation. The high temperature compressive deformation behavior of the superplastic B,C-SiC was invcstigatcd. The compressive tests were conducted at the temperature range from 1600 to 1800°C at various strain rates from 3x10 -6 to 1x10 -4 s -1 . The some cracks were formed during the deformation of 30% at all test conditions. The specimen fractured without deformation at 1600°C at 1x10 -4 s -1 . The SEM observation after deformation revealed the equiaxed grain shape and the grain growth.
Published Version
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