Thermophysical properties of porous SiC ceramics fabricated by pressureless sintering

被引：78
作者：
Jang, Byung-Koog [1 ]
Sakka, Yoshio [1 ]
机构：
[1] Natl Inst Mat Sci, Nanoceram Ctr, Tsukuba, Ibaraki 3050047, Japan
来源：
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS | 2007年 / 8卷 / 7-8期
关键词：
SiC; laser flash method; thermal diffusivity; thermal conductivity; porosity;
D O I：
10.1016/j.stam.2007.08.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Highly porous SiC with approximately 30-41% porosity was fabricated by pressureless sintering without sintering additives at temperatures in the range 1700-2000 degrees C. Thermal diffusivities, specific heats, thermal conductivities and thermal resistivities of sintered samples are reported for temperatures from room temperature to 1000 degrees C. The thermal diffusivities and thermal conductivities of all samples decreased significantly with increasing temperature over this range, whereas specific heats and thermal resistivities increased. At any given temperature, the greater the porosity of the SiC, the lower the thermal conductivity. (C) 2007 NIMS and Elsevier Ltd. All rights reserved.
引用
收藏
页码：655 / 659
页数：5
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