本文已被：浏览 5次 下载 11次
Abstract:TiC/Ti composites with different TiC addition and different carbon sources(carbon powder, carbon nanotubes or carbon fibers) were prepared by in-situ casting route. The effect of different TiC addition and carbon sources on as-cast and forged TiC/Ti composites were investigated. The fracture toughness and room temperature compressive properties were also tested. The results show that TiC/Ti composites are mainly composed of α-Ti and TiC. With the increasing volume fraction of TiC, the width of the lamellar α is gradually decreased; the morphology of TiC is banding or flaky. After forging, the TiC is nearly equiaxed, and the lamellar α is further refined. The fracture toughness of as cast TiC/Ti composites prepared with carbon powder as in-situ reactive carbon source is higher than that with carbon fiber or carbon nanotube as carbon source.There is no significant difference in the compressive strength and yield strength of as cast TiC/Ti composites prepared with different carbon sources.After forging, the fracture toughness decreases overall, while the room temperature compressive strength and yield strength increase overall.
keywords: titanium matrix composites TiC addition carbon sources microstructure mechanical properties
文章编号： 中图分类号： 文献标志码：