材料科学
电阻率和电导率
碳化硅
抗压强度
复合材料
陶瓷
热导率
多孔性
多孔硅
碳热反应
微观结构
碳纤维
硅
碳化物
冶金
复合数
电气工程
工程类
作者
Gyoung-Deuk Kim,Young‐Wook Kim,In‐Hyuck Song,Kwang Joo Kim
标识
DOI:10.1016/j.ceramint.2020.03.106
摘要
The properties of porous SiC ceramics were investigated as a function of Si/C content. The addition of C to SiC decreased the electrical resistivity, thermal conductivity, and compressive strength of the porous SiC ceramics for an increase in C content from 0 to 50 wt%. In contrast, the addition of Si to SiC increased both electrical resistivity and compressive strength and decreased thermal conductivity for an increase in Si content from 0 to 30 wt%. The addition of 5 wt% C increased the electrical conductivity, compressive strength, and thermal conductivity of porous SiC ceramics because of the partial densification of SiC by the removal of silica via carbothermal reduction. The current results suggest that both the electrical and thermal conductivities of porous SiC ceramics can be adjusted in the range of 9.0 × 10−2 –3.9 × 101 Ω cm and 1.3–31.4 W/(m·K), respectively, by controlling the Si or C content.
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