颗粒增强Al基复合材料组织和性能的研究

Microstructure and properties of particle reinforced aluminum matrix composites

采用高能球磨粉末冶金法制备颗粒增强Al基复合材料,分别以ZrO2,SiC和α-Al2O3为增强体,对比分析了不同颗粒增强Al基复合材料的组织与性能。以α-Al2O3颗粒为主增强体,分析了不同粒度α-Al2O3对复合材料组织性能的影响。研究结果表明,ZrO2/Al和SiC/Al复合材料的界面结合不如α-Al2O3/Al复合材料的界面结合紧密,α-Al2O3颗粒粒径为45μm时,复合材料性能更好地得到改善,添加适量的Ce能改善基体与增强体的界面结合,并显著地提高了颗粒增强Al基复合材料的性能。

High-energy ball milling powder metallurgy was employed to prepare the particle reinforced aluminum matrix composites. With ZrO2, SiC and α-Al2O3 particles as the reinforcements, the micro structure and properties of different particles reinforced aluminum matrix were compared. The α-Al2O3 particles were chosen as the main reinforcement, and the effects of different reinforcement particle size on the microstructure and properties of the composites are analyzed, The results show that： the interface integration of the α-Al2O3/Al composites is better than that of the ZrO2/Al and SiC/Al composites; the ideal particle size of composites is 45μm （α-Al2O3）; the addition of proper amount of RE element Ce to the α-Al2O3 composites can improve the interface integration of the composites, and the properties of the α-Al2O3 composites are significantly enhanced.