Microstructure and properties of submicron-scale TiC particle reinforced titanium matrix composites prepared by shock wave consolidation

来源期刊：中国有色金属学报(英文版)2004年第3期

论文作者：孙巧艳 朱蕊花 顾海澄

文章页码：537 - 542

Key words：titanium matrix composites; mechanical properties; shock wave consolidation

Abstract: Submicron-scale TiC particle reinforced titanium matrix composites(TMCs) were prepared by shock wave consolidation technique at detonation speed of 2 500-5 000 m/s. The microstructures were studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The compressive strength and hardness values of the composites were also determined. The results show that the composites have higher compressive yield strength and hard ness values than hot-rolled pure titanium. Twins in the microstructure of TMCs show that titanium particles undergo plastic deformation during consolidation process. The fine grains with size less than 1μm often locate in the boundaries among the titanium particles. TiC particles seem to keep unchanged during the consolidation. These bring about the increase in strength and hardness for the composites. The detonation speed of 3 200 m/s is proper parameter for compacting powder in the present work.