网络陶瓷增强铝基复合材料的摩擦磨损性能及磨损模型研究

Study on Friction and Wear Resistance and Wear Model of Aluminum Matrix Composites Reinforced with Network Ceramics

研究了网络陶瓷增强铝基复合材料在干滑动摩擦条件下的磨损行为,并在试验的基础上建立了复合材料的磨损模型。结果表明,复合材料的耐磨性明显优于基体合金,其主要原因是增强体独特的网络结构可制约基体合金的塑性变形,并减少偶件同基体合金的接触;从复合材料的磨损率方程中发现,在载荷、转速、时间3个影响因素中,转速对磨损率的影响最大,载荷次之,时间最小;磨损率方程的预测值与实测值符合的很好,建立的磨损模型符合实际磨损状况。

The tribological behavior of the network ceramic reinforced aluminum matrix composite was studied in dry sliding conditions of wear, and a wear model was established based on the experimental results. The results show thatthe wear resistance of the composite material is superior to aluminum matrix alloy, because the unique structure of network ceramic e can restrain plastic deformation of the matrix alloy, and reduce the contact between the matching parts and the matrix alloy. From the wear rate equation, it is found that the rotating speed and wearing period have the largest and least effect on the wear rate, load is intermediate. The calculated results are in good accordance with the measured results, therefore the wear model established is well fitted with practical wear conditions.