混粉方法对SiC_p(B_4C_p)/Al复合材料增强体颗粒分布均匀性的影响

采用定性和定量手段系统比较了高能球磨法与常规混合法对ＳｉＣｐ（Ｂ４Ｃｐ）／Ａｌ复合材料增强体颗粒分布均匀性的影响。研究结果表明：高能球磨法能使增强体颗粒弥散均匀分布于基体中，是实现增强体颗粒均匀分布的最有效的方法；常规混合法制备的复合材料存在增强体颗粒的偏聚现象，颗粒偏聚程度与混粉方式和混粉时间有关，干混存在最佳混粉时间，而湿混时混合物均匀度随混粉时间延长而不断提高。

Effect of Powder Mixing Method on the Spatial Distribution of Reinforcers of the SiC p(B 4C p)/Al Composites

The effects of high energy ball milling and general mixing on the spatial distribution of reinforcers of the SiC p(B 4C p)/Al composites have been investigated systematically by means of qualitative and quantitative methods. High energy ball milling, which leads to the dispersed homogeneous distribution of reinforcers in the matrix, is the most effective method for obtaining homogeneous distribution of reinforcers. There are many clusters of reinforcers in the composites fabricated by general mixing. The segregation degree of reinforcers is related to mixing medium and mixing time. The most uniform distribution of reinforcers has been obtained through long time dry blending, and for wet mixing distribution of reinforcers can be also improved when increasing the mixing time.