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以纯铜粉、锆粉、AlN粉为原料,采用放电等离子烧结方法制备了AlN/Zr-Cu复合材料,研究了AlN含量(1%~20%,质量分数,下同)对该复合材料微观形貌、力学性能和摩擦磨损性能的影响,分析了其磨损机理。结果表明:细小的AlN颗粒在铜合金基体中呈弥散分布;当AlN含量为1%~15%时,复合材料较致密,当AlN含量增加到20%时,其组织疏松;随着AlN含量的增加,复合材料的显微硬度和抗压强度都呈现出先增大后减小的变化趋势,摩擦因数和磨损量均先减小后增大,磨损机理由黏着磨损向磨粒磨损、剥落磨损依次转变。
AlN / Zr-Cu composites were prepared by spark plasma sintering using pure copper powder, zirconium powder and AlN powder as raw materials. The effects of AlN content (1% ~ 20%, mass fraction) Appearance, mechanical properties and friction and wear properties, and analyzed its wear mechanism. The results show that the fine AlN particles are dispersed in the matrix of copper alloy. When the content of AlN is 1% ~ 15%, the composites are dense. When the AlN content increases to 20%, the microstructure is loose. With the AlN content Increase, the microhardness and compressive strength of the composite showed the trend of first increasing and then decreasing, the friction coefficient and the wear volume first decreased and then increased, the wear mechanism from the adhesive wear to abrasive wear, flaking wear in turn change.