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本文分析了喷雾共沉积颗粒增强金属基复合材料工艺中颗粒进入金属基体的动力学过程和可能机制，首次提出对于陶瓷颗粒／铝等非润湿系，颗粒将按射入机制进入基体；并由颗粒进入沉积层液膜的力学平衡关系，推导出颗粒按射入机制进入基体时，沉积前所需达到的临界速度表达式。在射入机制和大量实验的基础上，提出了一种新的颗粒加入方法即外部环孔式喷嘴注入法，解决了微细ＳｉＣ颗粒在基体中分布不均匀、体积分数难以控制和提高等工艺难点，制出了Ｗ１０ＳｉＣ颗粒在基体中分布均匀、体积分数达１４．７ｖｏｌ％的ＳｉＣ＿Ｐ／Ａｌ复合材料。
In this paper, the kinetics and possible mechanism of particles entering the metal matrix in spray co-deposition particle reinforced metal matrix composites are analyzed. It is first proposed that particles will enter the matrix according to the mechanism of injection when the particles are non-wetting, such as ceramic particles / aluminum. The mechanical equilibrium relationship between the particles and the liquid film deposited in the sediment layer is deduced. The critical velocity expression required before the particles enter the matrix is deduced. Based on the mechanism of injection and a large number of experiments, a new method of adding particles to the outer ring nozzle is proposed, which solves the difficulties in the process of uneven distribution of SiC particles in the matrix, difficult to control and increase the volume fraction , The SiC_P / Al composites with W10SiC particles distributed uniformly in the matrix with the volume fraction of 14.7vol% were fabricated.