ZrO2 加入量对Zr-8Al合金化学复合镀性能的影响

对Zr-8Al合金进行了化学复合镀Ni-P-ZrO_2处理,并研究了不同ZrO_2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-ZrO_2复合镀层的显微硬度值显著提高,ZrO_2的添加量为4 g/L获得复合镀层显微硬度最高,耐磨性好;在3.5%(质量分数)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4 g/L ZrO_2粒子制备的Ni-P-ZrO_2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。

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

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.