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发明公开
CN104692778A 一种含莫来石增强相的Al2O3/SiC复合材料及其制备方法 无效 - 驳回

一种含莫来石增强相的Al2O3/SiC复合材料及其制备方法
摘要：
本发明公开了一种含莫来石增强相的Al2O3/SiC复合材料及其制备方法，属于无机非金属材料技术领域。该材料以SiO2包覆的SiC颗粒和Al2O3为原料制成，SiC颗粒表面包裹SiO2使Al2O3定向在SiC颗粒表面与SiO2反应生成莫来石，生成的莫来石桥接SiO2颗粒与Al2O3，提高复合材料的韧性。本发明制备方法，采用微波加热的方式烧结，复合材料中的SiC颗粒吸收微波热量，实现材料内部自身加热，使热量从内向外扩散，促进Al2O3与SiO2反应生成的莫来石由内向外定向生长，桥接SiO2颗粒与Al2O3，提高复合材料的韧性。
摘要（英）：

The invention discloses an Al2O3/SiC composite material containing mullite reinforcing phases and a method for preparing the Al2O3/SiC composite material containing the mullite reinforcing phases, belonging to the technical field of inorganic nonmetal materials. The Al2O3/SiC composite material is prepared from Al2O3 and SiC particles coated with SiO2, wherein the surface of the SiC particles is coated with SiO2, so that Al2O3 is directed to the surface of the surface of the SiC particles to react with SiO2 to produce mulluite which bridges SiO2 particles and Al2O3, and consequently the toughness of the composite material is improved. According to the method for preparing the Al2O3/SiC composite material containing the mullite reinforcing phases, sintering is carried out in a way of microwave heating, and SiC particles in the composite material absorb microwave heat to achieve the internal self heating of the material, so that the heat is radiated from inside to outside to promote mullite produced by the reaction between Al2O3 and SiO2 to directionally grow from inside to outside so as to bridge the SiO2 particles and Al2O3, and the toughness of the composite material is improved.

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