Al2O3颗粒增强聚氨酯基复合材料耐磨性研究

本文研究了Al2O3颗粒增强聚氨酯基复合材料在浆料冲蚀下的耐磨性.结果表明,复合材料的耐磨性随着Al2O3颗粒含量的增加先升高,达到一个峰值后,开始下降.在一定Al2O3颗粒含量下,复合材料的耐磨性好于纯聚氨酯弹性体.这是由于复合材料中的Al2O3颗粒硬度高,可以抵抗浆料的冲蚀磨损,保护周围和下层的基体组织.Al2O3颗粒与基体界面的结合强度对复合材料耐磨性有明显的影响.用KH550处理的复合材料的界面结合强度比用KH560处理的好,所以耐磨性更好.

Erosion Wear Resistance of Polyurethane Matrix Composites Reinforced with Aluminum Oxide Particles

The paper investigated the erosion wear resistance of polyurethane matrix composites reinforced with aluminum oxide(Al -2O -3)particles on a slurry erosion machine.With the increasing of Al -2O -3 particles,the wear resistance of the composites was found first increasing until reaching a maximum,then decreasing.When the content of Al -2O -3 particles was less than the critical value which corresponded to the maximum of resistance,the wear performance of the composites was better than pure polyurethane elastomer,because Al -2O -3 particles was much harder than abrasive SiO -2 particles in slurry and could protect the matrix from scratching by the abrasive particles.In addition,bonding strength between Al -2O -3 particles and the matrix was found to be very influential to the wear resistance of the composites,since the composites processed by the silane coupler with amidocyanogen had higher wear performance than those processed by the silane coupler with epoxy group,due to the higher reaction activity of the former with the matrix than the latter.