ZrO2 加入量对Zr-8Al合金化学复合镀性能的影响

Effects of ZrO2 addition on the properties of electroless composite plating on Zr-8Al alloy

摘要:

本文对Zr-8Al合金进行了化学复合镀Ni-P-ZrO2处理，并研究了不同ZrO2粒子加入量制备的复合镀层的显微结构、显微硬度、耐磨性和抗蚀性。结果表明，与单纯化学镀Ni-P镀层相比，Ni-P-ZrO2复合镀层的显微硬度值显著提高，ZrO2的添加量为4g/L获得复合镀层显微硬度最高，耐磨性好；在3.5wt%NaCl溶液中耐蚀性虽有所下降，但腐蚀后镀层完整，仍具有较好的抗蚀性。Zr-8Al合金表面采用4g/LZrO2粒子制备的Ni-P-ZrO2复合镀层兼具很好的耐磨性和较好的耐蚀性，适用于既要耐磨又要抗蚀的空间活动构件。

Abstract:

In this paper, electro-less Ni-P-ZrO2 composite plating was preformed on Zr-8Al alloy. The microstructure, microhardness, wear resistance and corrosion resistance in 3.5 wt% NaCl solution of electro-less composite platings for different ZrO2 addition were investigated. The results show that the microhardness of electro-less Ni-P-ZrO₂ composite plating was improved compared with that of electro-less Ni-P plating. The microhardness and wear resistance of electroless Ni-P-ZrO2 composite plating for 4g/L ZrO2 addition is super. The corrosion resistance of the electroless Ni-P-ZrO2 composite plating is a bit lower than that of electro-less Ni-P plating, yet the composite plating after corrosion is still complete. So the corrosion resistance of the electroless Ni-P-ZrO2 composite plating for 4g/L ZrO2 addition is still better. The Ni-P-ZrO2 plating on Zr-8Al alloy is potential to applied for moving parts in space which require excellent wear resistance and good corrosion resistance.