Mullite Reinforced SiC/Al2O3 Composites Prepared by Microwave Sintering Based on Green Manufacturing

In the preparation process of composites, implementation green manufacturing technology has an important impact on improving material properties and efficiency. The adopting not only greatly reduces energy consumption but also effectively avoids environmental pollution. Compared with traditional process, for is a new concept idea. Microwave sintering such efficient, clean, pollution-free so it widely used in field preparation. By microwave sintering, mullite reinforced SiC/Al2O3 composites different SiC particle size were prepared from composite powders composed particles coated SiO2, by sol-gel method Al2O3 particles. effect microstructure, bulk density, fracture toughness, flexural strength, thermal shock resistance was studied. strength evaluated Archimedes method, single-side notched beam three-point bending respectively. samples investigated through combination water quenching methods. results showed that increase size, all increased first then decreased. retention SiC(5 μm)/Al2O3 better than those other samples, which 2.06 g/cm3, 1.98 MPa·m1/2, 63 MPa, 60%, mechanical are due to formation bridging whiskers between large length diameter ratio. Therefore, unique mechanisms coupling local aggregation discussed. research can provide reference wide application technology.