Fabrication of FeAl/TiC composites through reactive hot pressing^①

来源期刊：中南大学学报(英文版)2004年第4期

论文作者：刘峰晓 刘咏 黄伯云 贺跃辉 周科朝

文章页码：343 - 347

Key words：FeAl/TiC composite; densification process; mechanical property; reactive hot pressing

Abstract: FeAl/TiC composites were fabricated by reactive hot pressing blended elemental powders. The TiC content was varied from 50% to 80%(volume fraction) and the aluminum content in the binder phase was changed from 40% to 50%(mole fraction). The effects of these compositional changes on the densification process and mechanical properties were studied. The results show that with the increase of TiC content, densities of the composites decrease due to insufficient particle rearrangement aided by dissolution reprecipitation reaction during hot pressing. Closely related with their porosities and defect amount, the hardness and bend strength of the composites show peak values, attaining the highest values with TiC content being 70% and 60%, respectively. Increasing the aluminum content is beneficial to the densification process. But the hardness and bend strength of the composites are reduced to some extent due to the formation of excessive oxides and thermal vacancies.