(上海交通大學(xué) 金屬基復(fù)合材料國家重點實驗室， 上海 200030)
摘 要: 通過化學(xué)復(fù)合鍍制備納米氧化鋁粒子增強鎳-磷合金復(fù)合鍍層， 并對所得表面納米復(fù)合材料進行透射電鏡顯微分析（TEM）、 掃描電鏡顯微分析(SEM)、 X射線衍射分析(XRD)、 能譜成分分析(EADX)和示差掃描量熱分析(DSC)。 結(jié)果表明： 納米粒子在復(fù)合鍍層中含量較高且分布均勻； 所得鍍層是中磷非晶態(tài)。 納米粒子使得復(fù)合鍍層晶化溫度降低， 顯微硬度值比鎳-磷合金鍍層明顯提高。 在一定條件下熱處理， 復(fù)合鍍層晶化， 硬度值大幅提高。
關(guān)鍵字: 化學(xué)復(fù)合鍍； 納米氧化鋁粒子； 晶化； 顯微硬度
HU Wen-bin, DING Wen-jiang
（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
