Microstructure and Properties of AgSnO2 Composites by Accumulative Roll-bonding Process

AgSnO2 composites prepared by a reaction synthesis method were investigated. The phases of AgSnO2 composites were analyzed using X-ray diffraction. The microstructure, density, hardness and resistivity of AgSnO2 composites after four-pass accumulative roll bonding (ARB) at 973 K were analyzed. Results show that microstructure and properties of AgSnO2 composites are significantly affected by the ARB process. The pass number of ARB decides the distribution of SnO2 particles in silver matrix. Roll bonding can promote the uniform distribution of SnO2 particles in silver matrix; however, it can also cause second agglomeration of SnO2 particles due to stacking. With the increasing of ARB number, the density and hardness increase. The resistivity has a slight reduction at the first-pass roll bonding, but then it increases with the increasing of ARB number.