中文摘要：

考虑网络结构增强体特殊的拓扑结构因素和弹性模量影响，利用复合材料磨损率最小化和最大化假设，建立了网络结构增强复合材料的磨损模型，同时制备了不同体积分数的Si3N4陶瓷增强Al-Mg合金复合材料，并将其磨损试验结果数据拟合到模型中．结果表明，所建立的模型可以反映复合材料增强相的体积分数、复合材料的弹性模量和磨损率之间的数学关系，证明复合材料的摩擦磨损率随增强相体积分数的增加而逐渐降低，当体积分数超过45％～50％时，磨损率随增强相体积分数的增加而逐渐增大．该模型不同于Khmschov模型和Zum—Gahr模型，其关系不遵循线性规则．与增强体复合材料的磨损试验数据拟合表明，该模型能够较好地反映网络结构增强复合材料的磨损性能，具有一定普遍性．

英文摘要：

An abrasive wear model of composites reinforced by three-dimensional （3-D） network structure is proposed. Factors such as special topology structure characteristic of reinforcement and elastic module were discussed in this model. The model based on the maximal and minimal hypothesis posts the mathematic relation among volume content of reinforcement, elastic module and wear rate. Unlike the Khruschov model and Zum-Gahr model, the proposed model was no longer follow linear rule. Si3N4/Al-Mg composites with different volume content were fabricated and friction and wear test were done. The data agree with the model very well. With increase of volume content of reinforcement, wear rate of composites decreases gradually. When increase of volume contents exceed 45% 50% , wear rate increases in reverse.