Microstructure and properties of Cu-15%Cr2AlC composite prepared by cold-pressing and sintering
SUN Lin1，LIU Jin-yun1，GUO Yang1，JIN Ying-Rong1，LU Yun2
1. School of Material Science and Engineering， Xihua University， Chengdu 610039， China 2. Faculty of Engineering， Chiba University， Chiba 263-8522， Japan
Abstract：With homemade high purity Cr2AlC ceramic powder as raw material， the Cu-15%Cr2AlC (mass percent) composite material was prepared by cold-pressing and sintering. The effect of pressing pressure， sintering temperature and sintering time on the resistivity， thermal conductivity， friction coefficient， fracture mode and microstructure of the composite was studied. Results show that resistivity and friction coefficient of the composite decrease， and thermal conductivity of the composite increases with the increasing of the pressing pressure and sintering temperature. The resistivity decreases， the friction coefficient decreases firstly and then increases， and the thermal conductivity increases firstly and then decreases with sintering time increasing. The fracture mode of the composite is brittle fracture. With the increasing of sintering temperature and sintering time， solid solution strengthening occurs between Cr2AlC and Cu， which causing lattice constant distortion of Cr2AlC.
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2016, Vol. 26 
