Influence of sintering atmosphere on the performance of porous silicon carbide ceramics

被引：0
作者：
Sheng, Hong [1 ]
Zhang, Kaihong [1 ]
Li, Ziqiang [1 ]
Liu, Xiaoxue [1 ]
机构：
[1] Tsinghua Univ, Collaborat Innovat Ctr Adv Nucl Energy Technol, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China
来源：
PROCEEDINGS OF THE 2016 4TH INTERNATIONAL CONFERENCE ON MACHINERY, MATERIALS AND COMPUTING TECHNOLOGY | 2016年 / 60卷
关键词：
porous SiC ceramics; coat-mix; sintering atmosphere; performance; SIC CERAMICS; COAT-MIX; HIGH-POROSITY; HIGH-STRENGTH; FABRICATION;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The core-shell structure precursor powder was fabricated by coat-mix process in different fabrication conditions with various aging pH value. The porous silicon carbide ceramics were prepared through molding, carbonization, and sintering in argon atmosphere and vacuum, respectively. Morphology, physical phase, weight loss rate, density, porosity, bending strength and thermal shock resistance of porous silicon carbide ceramic samples were analyzed and the results show that the aging pH values of ceramic samples sintered in both of atmospheres have the consistent influence on the performance of the samples. The ceramic samples sintered in vacuum have a better bending strength and porosity, while ceramic samples sintered in Ar atmosphere have a better purity and toughness. When the pH value of aging process ranges from 3 to 5, the porous SiC ceramic samples sintered in Ar atmosphere have a stable thermal expansion coefficient.
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页码：150 / 155
页数：6
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