Abstract
6H‐SiC powder mixed with Si3N4, Al2O3, Y2O3, and AlN was sintered in a spark plasma sintering (SPS) equipment. The 6H→3C SiC transformation was concerned. Research results indicated the polytype transformation completed in less than 30 s by imposing a 14 458 W (6.2 V, 2332 A) transitory DC current at 1700°C upon cooling down from 2000°C. The fast transformation kinetic and the significant 3C‐SiC grain growth accompanying the phase transformation were suspected to be correlated with the pulsed SPS direct current.
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Schedule a callMore From: Journal of the American Ceramic Society. American Ceramic Society
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