采用挤压铸造法制备TiB2P/Al复合材料,并借助XRD,SEM,TEM和三点弯曲、摩擦磨损等分析测试手段研究了该材料的组织和性能.结果表明,复合材料组织致密,颗粒分布均匀,相组成主要为Al和TiB2.TEM观察表明,T6态复合材料基体中发现大量细小的β'析出相和位错.部分界面上存在不连续的块状反应物MgAl2O4.45%TiB2P/Al(体积分数,下同)复合材料的抗弯强度为934 MPa,弹性模量为183 GPa,比30%TiB2P/Al复合材料的分别提高了34%和28%.常温干摩擦条件下,TiB2P/Al复合材料摩擦系数变化平缓(在0.2左右波动),明显低于铝合金的摩擦系数;且复合材料的磨损表面较为平整、光滑,未观察到大塑性变形,呈现出良好的自润滑性能.
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