The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 18, 2017
Filed:
Aug. 10, 2015
Dongguan South China Design and Innovation Institute, Dongguan, Guangdong, CN;
Guangdong University of Technology, Guangdong, CN;
Shanghua Wu, Dongguan, CN;
Qiangguo Jiang, Dongguan, CN;
Weiming Guo, Dongguan, CN;
Shangxian Gu, Dongguan, CN;
Maopeng Zhou, Dongguan, CN;
Wei Liu, Dongguan, CN;
Lixia Cheng, Guangdong, CN;
Bo Wang, Guangdong, CN;
Chengyong Wang, Guangdong, CN;
Qimin Wang, Guangdong, CN;
DONGGUAN SOUTH CHINA DESIGN AND INNOVATION INST., Dongguan, CN;
GUANGDONG UNIVERSITY OF TECHNOLOGY, Guangzhou, CN;
Abstract
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 β-Si3N4 nuclei was easily to texture during the flowing process, due to the small size of the β-Si3N4 nuclei and the high porosity of the flowing specimen. After aligned, the β-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.