脉冲电流烧结机理的研究进展

无机材料学报

脉冲电流烧结机理的研究进展

王士维¹; 陈立东¹; 平井敏雄²; 郭景坤¹

1. 中国科学院上海硅酸盐研究所; 上海 200050; 2. 日本东北大学金属材料研究所; 日本仙台980-8577

收稿日期:2000-11-28 修回日期:2001-03-12 出版日期:2001-11-20 网络出版日期:2001-11-20

Recent Development of Pulse Electric Current Sintering Mechanism

WANG Shi-Wei¹; CHEN Li-Dong¹; Hirai Toshio²; GUO Jing-Kun¹

1. Shanghai Institute of Ceramics; CAS; Shanghai 200050; China; 2. IMR; Tohoku University; Sendai 980-8577; Japan

Received:2000-11-28 Revised:2001-03-12 Published:2001-11-20 Online:2001-11-20

摘要/Abstract

摘要： 脉冲电流烧结（Ｐｕｌｓｅｅｌｅｃｔｒｉｃｃｕｒｒｅｎｔｓｉｎｔｅｒｉｎｇ，ＰＥＣＳ）是材料科学领域开发出的一种新型快速烧结技术，已广泛应用于金属与合金、结构陶瓷、氧化物超导体、复合材料、热电材料、高分子材料以及功能梯度材料的制备．本文简介脉冲电流烧结特征，结合ＰＥＣＳ烧结条件对铜粉末和氧化铝粉体致密化及显微结构影响的实验证据，就脉冲电流烧结过程和机理进行探讨．

关键词: 脉冲电流烧结, 显微结构, 烧结机理

Abstract: Pulse electric current sintering (PECS) is a new rapid sintering approach. A variety of materials such as metal, ceramics, composite and functionally graded
materials have been prepared. PECS apparatus is somewhat like a conventional hot-press apparatus. It is characterized by the application of a pulse electric current
and/or a direct current as the power and by the graphite mold and punches acting as heating elements. Much attention has been paid to investigate the sintering
process of PECS from different standpoints. In the sintering of metallic (copper) powder, pulse current is effective in promoting the densification of copper powder
compacts because pulse current passes through both the graphite mold and the powder compact. In the sintering of non-metallic (Al₂O₃) powder, the densification
of Al₂O₃ powder is due to heat transfer from the graphite mold and punches. Heating rate of PECS is high by the application of a large electric current and
heat transfer is efficient by using the graphite mold and punches as heating elements. Therefore, rapid sintering is made possible.

Key words: pulse electric current sintering, microstructure, sintering mechanism

中图分类号:

TF124

王士维,陈立东,平井敏雄,郭景坤. 脉冲电流烧结机理的研究进展[J]. 无机材料学报.

WANG Shi-Wei,CHEN Li-Dong,Hirai Toshio,GUO Jing-Kun. Recent Development of Pulse Electric Current Sintering Mechanism[J]. Journal of Inorganic Materials.

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