网络陶瓷增强铝基复合材料的摩擦磨损性能及磨损模型

本文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,并在大量试验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,并减少对偶件同基体合金的接触,从而有效地增强了复合材料的耐磨性能;从复合材料的磨损率方程中发现,在三个影响因素(载荷、转速、时间)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。

A study of friction and wear properties and wear model of aluminum matrix composites reinforced with network ceramics

In this paper,the network ceramic reinforced aluminum matrix composites was studied in the dry sliding conditions of wear and a composite model of wear was established through a large number of experiments.The results showed that the wear resistance of composite materials were superior to aluminum matrix alloy,which mainly lied in the unique network structure that could restrict the plastic deformation of the matrix alloy and reduce the possibility of the contact between the counterface and the matrix,thereby the wear-resistant of composite materials were increased effectively;From the wear rate equation of composite materials,it was found that the largest impact on wear rate was speed,load took the second place,the smallest was wear time;Theoretical values of the wear rate equation were well in accordance with experiments,the wear model which was established matched with the realistic situation of wear.