Surface diffusivity under high-pressure gas

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作者：
机构：
[1] Nanko, Makoto
[2] Ishizaki, Kozo
[3] Fujikawa, Takao
[4] Kondo, Yoshihito
来源：
Nanko, Makoto | 1695年 / American Ceramic Soc, Westerville, OH, United States卷 / 78期
关键词：
Densification - Density (specific gravity) - Diffusion - Gases - Hot isostatic pressing - Porosity - Porous materials - Pressure effects - Sintering - Surface properties - Surfaces;
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摘要：
The sintering behavior of TiO2 under high-pressure gas (100 MPa) was studied with respect to densification rate, decreasing rate of specific surface area, and narrowing rate of pore size distribution. At the low sintering temperature (800°C) used in this study, the densification rate under high-pressure gas was similar to that under low (i.e., 1 atm) pressure. The specific surface area decreased and the pore size distribution narrowed at a faster rate under high-pressure gas than under low-pressure gas. These results imply that high-pressure gas enhances surface diffusion.
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