【摘要】 以聚氨酯预聚体改性环氧树脂为基体 ,以Al2 O3 颗粒为增强相 ,制备了树脂基复合材料 .在自制的磨损试验机上 ,系统考察了具有单一颗粒 (粒度约 2 0 0 μm)和具有级配颗粒 (质量比为 3∶1)的树脂基复合材料的冲蚀磨损特性随颗粒体积分数的变化规律 ,并结合磨损表面的形貌特征对其磨损机理进行了初步探讨 .结果表明 :对于具有单一颗粒粒度的复合材料 ,当陶瓷颗粒的体积分数约为 2 2 %～ 2 5%时 ,其抗冲蚀磨损特性最佳 ,是正火态 4 5号铸钢的 2 8倍 ;对于具有级配颗粒的复合材料 ,当陶瓷颗粒的体积分数约为 2 6%～ 30 %时 ,其抗冲蚀磨损特性最佳 ,是正火态 4 5号铸钢的 36倍 .更多还原

【Abstract】 Based on the epoxy matrix modified by polyurethane, the epoxy-based composites reinforced by alumina particles were manufactured. The erosive wear characteristics of the composites with single particle size and a certain particle size combination were investigated on the self-made wear tester. The experimental results show that the wear resistance of the composites with single size of 22%～25%(volume fraction)alumina particles is 28 times of ZG45.For the composites with a certain particle size combination, where the alumina particle volume fraction is about 26%～30%, the wear resistance is 36 times of ZG45.更多还原