Study on Friction Properties of Aluminum/Graphite Composites at Different Temperatures
Aluminum/graphite composites were prepared by pressure casting with ZL105 as matrix and porous carbon as carbon source,the microscopic phase morphology was analyzed by X-ray diffractometer(XRD)and scanning electron microscope,and the mechanical properties were obtained by measuring hardness and compressive strength.The results show that porous carbon can bond well with matrix.The hardness of the composite is 94.5%of the matrix alloy and the compressive strength is 37%of the matrix.The mechanical properties of the composite are reduced.The friction properties of the composites at different temperatures(25-350℃)were studied,and it is found that the composites have better wear resistance at high temperature.When the temperature reaches 300℃,the matrix alloy fails,while the composite can withstand a temperature of 350℃.
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