(上海交通大学 金属基复合材料国家重点实验室， 上海 200030)
摘 要: 通过化学复合镀制备纳米氧化铝粒子增强镍-磷合金复合镀层， 并对所得表面纳米复合材料进行透射电镜显微分析（TEM）、 扫描电镜显微分析(SEM)、 X射线衍射分析(XRD)、 能谱成分分析(EADX)和示差扫描量热分析(DSC)。 结果表明： 纳米粒子在复合镀层中含量较高且分布均匀； 所得镀层是中磷非晶态。 纳米粒子使得复合镀层晶化温度降低， 显微硬度值比镍-磷合金镀层明显提高。 在一定条件下热处理， 复合镀层晶化， 硬度值大幅提高。
关键字: 化学复合镀； 纳米氧化铝粒子； 晶化； 显微硬度
（State Key Laboratory of Metal Matrix Composites,
Shanghai Jiaotong University, Shanghai 200030, China）
Abstract: Nano-particle reinforced Ni-P matrix composites were prepared by electroless plating. It’s shown that Al2O3 nano-particles co-deposite evenly in layers according to the results of TEM. Al2O3 nano-particles cause the crystallization temperature of the composites to drop, and Ni3P precipitate after heat-treatment at 230℃ for 24h in Ni-P- Al2O3 coating. The microhardness of the layers increase greatly due to nano-particles, and the microhardness of Ni-P- Al2O3 coating is HV1193 after heat-treatment at 400℃ for an hour.
Key words: electroless composite plating; Al2O3 nano-particles; crystallization; microhardness
