Cross-sectional Area Dependency of Shrinkages and Grain Sizes of Flash-sintered 3 mol%Y2O3–ZrO2 Polycrystals with a Circular Truncated Cone-shape at High Frequency Alternating Electric Current Fields

被引：0

作者：

Kurachi T. ^{[1
]}

Kobayashi K. ^{[2
]}

Tokunaga T. ^{[1
]}

Yamamoto T. ^{[1
]}

机构：

[1] Dept. Materials Design Innovation Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya

[2] Research Center for Functional Materials, National Institute for Materials Science, Sengen 1-2-1, Tsukuba

来源：

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy | 2021年 / 68卷 / 11期

基金：

日本科学技术振兴机构; 日本学术振兴会;

关键词：

alternating current field; field-assisted sintering technology; flash sintering; microstructure; zirconia;

D O I：

10.2497/jjspm.68.487

中图分类号：

学科分类号：

摘要：

The uniformity of shrinkages and the distribution of grain sizes were investigated for flash-sintered 3 mol%Y2O3-ZrO2 compacts in direct current and alternating current (AC) electric fields using rectangular-shaped and circular truncated cone-shaped green compacts. The use of a high-frequency AC electric field enough to suppress electrode overvoltage was confirmed to be advantageous for uniform shrinkages, regardless of the shapes of the green compacts. However, the grain size distribution became larger in cone-shaped green compacts, the cross-sectional areas of which varied along the compact. The grain sizes in flashed cone-shaped green compacts were found to exhibit a near linear relation to current density, which provides a means for determining the grain size distribution upon the flash sintering of green compacts with different cross-sectional areas along an electric field. ©2021 Japan Society of Powder and Powder Metallurgy.

引用

页码：487 / 493

页数：6

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