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Study on Microwave Sintering of Al_2O_3/SiC Nanocomposite Ceramic

Yuxiang Chen

Abstract

A dry gel was prepared from Al(NO3)3·9H2O,NH3·H2O and 50nm SiC powder via sol-gel technology.Al2O3/SiC nanocomposite ceramic was produced from the dry gel by means of microwave sintering.Compared with conventional sintered Al2O3/SiC nanocomposite ceramic,effects of two sintering methods on the Al2O3/SiC nanocomposite ceramics' mechanical properties were analyzed.The results indicated that the microwave processed Al2O3/SiC nanocomposite ceramic appears with improved density,fracture toughness and bending strength.

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Key concepts: Materials science, Nanocomposite, Sintering, Ceramic, Composite material, Fracture toughness, Flexural strength, Microwave