Guangdong University of Technology

Dongguan South China Design and Innovation Inst.

Lixia Cheng

Bo Wang

Wei Liu

Chengyong Wang

Qimin Wang

Shanghua Wu

Weiming Guo

Shangxian Gu

Qiangguo Jiang

Maopeng Zhou

The invention proposed a novel hot pressing flowing sintering method to fabricate textured ceramics. The perfectly 2-dimensional textured Si3N4 ceramics (Lotgering orientation factor fL 0.9975) were fabricated by this method. During the initial sintering stage, the specimen flowed along the plane which is perpendicular to the hot pressing direction under pressure, through the controlling of the graphite die movement. The rod-like &#x3b2;-Si3N4 nuclei was easily to texture during the flowing process, due to the small size of the &#x3b2;-Si3N4 nuclei and the high porosity of the flowing specimen. After aligned, the &#x3b2;-Si3N4 grains grew along the materials flowing direction with little constraint. textured Si3N4 ceramics fabricated by this invention also showed high aspect ratio. Compared to the conventional hot-forging technique which contained the sintering and forging processes, hot pressing flowing sintering proposed is simpler and lower cost to fabricate textured Si3N4.

Method of making textured ceramics

Growing community of inventors

Guangdong, China

Lixia Cheng