Physical, antioxidant and thermal shock properties of Cu/Ti₂AlC conductive composites

Abstract

Cu/Ti₂AlC composites were fabricated by vacuum hot-pressing technique. Phase composition was analyzed by XRD and morphology of fracture was observed by SEM. Physical performance such as density, resistivity, hardness and friction coefficient with different volume fraction of Cu/Ti₂AlC composites were studied. When the content of Ti₂AlC increased from 10% to 70%, the relative density reduced from 99.38% to 90.56% and the resistivity increased significantly. Hardness reached the maximum value when Ti₂AlC was at 60% and friction coefficient declined with the increasing of Ti₂AlC. Cu/Ti₂AlC composites, showing good conductivity properties and friction performance. Oxidation resistance enhanced obviously with the content of Ti₂AlC increasing. Cu-60%Ti₂AlC sample possessed optimum thermal shock resistance, and no cracking was found at 600 °C cycled for 10 times and 900 °C cycled for 1 time.

Keywords

Cu-based composites / Ti₂AlC / hot-pressing technique / properties

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