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Mullite-bonded porous silicon carbide ceramics were prepared by an in situ reaction bonding technique and sintering in air with SiC, porous Al 2 O 3 , and graphite as starting materials. The pores in the ceramics were formed by burning graphite and by stacking particles of SiC and Al 2 O 3 . The surface of SiC was oxidized to SiO 2 at high temperature. With...
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