Y2O3增强铜基复合材料微观结构及性能的研究

Study on Microstructure and Properties of YO Reinforced Copper Matrix Composites

三氧化二钇(Y2O3)粒子增强铜基复合材料具有超强的耐磨性能和耐腐蚀性能,在众多领域具有广泛的应用前景。以Y2O3添加量为0~20wt%的增强铜基复合材料为研究对象,进行磨损试验和腐蚀试验,考察Y2O3粒子的不同添加量对复合材料相关性能的影响。采用扫描电镜、透射电镜、微区成分等测试分析手段,对Y2O3增强铜基复合材料的显微组织结构进行了深入探究。结果表明:硬质点Y2O3与铜基材料通过合理的热加工工艺可获得理想的强化相,Y2O3粒子起到很好的弥散作用,对Cu粒子之间的空隙起到很好的填充和支撑效应,增强了与铜基体的结合强度和渗透能力,从而使铜基复合材料的耐腐蚀性、耐磨性得到较大的提高。当Y2O3粒子的添加量为5wt%时,Y2O3/Cu的耐磨性能、耐腐蚀性均较铜基体提高1倍以上。

Y2O3 particles reinforced copper-based composites have superior wear resistance and corrosion resistance, and have broad application prospects in many fields. The Y2O3 reinforced copper-based composites with an addition amount of 0-20 wt% were taken as the research object, the wear test and corrosion test were carried out to investigate the effect of different amount of Y2O3 particles on the properties of composites. By means of scanning electron microscope, transmission electron microscope and microzone composition, the microstructure of Y2O3 reinforced copper matrix composites was investigated deeply. The results show that the ideal strengthening phase can be obtained by reasonable thermal processing process between the hard point Y2O3 and copper-based materials. The Y2O3 particles play a good dispersion role, and play a good filling and supporting effect on the gap between the Cu particles, and enhance the bonding strength and permeability with the copper matrix, so that the corrosion resistance and wear resistance of the copper matrix composites can be greatly improved. When the addition amount of Y2O3 particle is 5 wt%, the wear resistance and corrosion resistance of Y2O3/Cu are more than 1 times higher than that of copper matrix.