✦ LIBER ✦

Preparation and mechanical properties of Fe3Al(Ti)/TiC composites

✍ Scribed by Jia Li; Qiang Liu; Rui-xia Shi; Yu Wen; Yan-sheng Yin

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 797 KB
Volume: 208
Category: Article
ISSN: 0924-0136
DOI: 10.1016/j.jmatprotec.2007.12.137

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✦ Synopsis

Near fully dense Fe 3 Al(10Ti)/TiC composites were synthesized by MA and hot-pressing sintering methods. Based on the Orowan strengthening effect offered by the nano-TiC particles, higher three-point bending strength and hardness values, 1310 MPa and 90 HRA, were achieved in Fe 3 Al(10Ti)/40 vol%TiC composite. The addition of Ti favored the improvement of hardness and room temperature bending strength of composites by the ordering strengthening effect and solid solution hardening effect. The microstructures of as-synthesized composites were investigated by XRD, SEM and TEM. Fe 3 Al particles had equiaxed morphology. TiC particles with grain size ranging from 50 to 200 nm were homogeneously dispersed in Fe 3 Al matrix. The larger TiC particles with sub-micrometer were mainly located at grain boundaries and the smaller ones were within matrix grains.

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