铜锆基金属玻璃表面镍镀层的构筑及其对塑性的影响

Nickel plating on a Cu Zr-based metallic glass and the influence on plasticity

通过对Cu46Zr46Al8金属玻璃进行镍电镀,不同厚度的镍镀层被施加于该金属玻璃侧面.研究发现,电镀时间和电流强度对镀层厚度和质量影响显著,当把电镀时间控制在3 h以内,电流强度在20 m A以下,镀层厚度随时间和电流强度呈线性增长趋势.随着电流强度的不断增大,电流效率逐步降低,当电流强度达到80 m A以上,电流对电镀速度的影响趋于饱和.不同厚度的镍镀层可以有效地提高金属玻璃的压缩塑性变形能力,其中200?m厚度的镍镀层可以把Cu46Zr46Al8金属玻璃的压缩塑性提高至9.5%.实验结果表明,镍电镀金属玻璃提供的侧面限制和保护,对金属玻璃的服役使用具有重要作用.

Nickel layer with different thickness is electroplated on the side surface of a Cu46Zr46A18 bulk metallic glass. Electroplating time and current intensity has the most important influence on the coating thickness and quality. When electroplating time within 3 h and current intensity below 20 mA, the coating thickness increases linearly with time and current intensity. With the continuous increase of current intensity, current efficiency reduced gradually. When current intensity reaches above 80 mA, the influence of current on plating speed tends to saturation. Nickel coating confinement can effectively improve the compressive plasticity of the Cu46Zrg6AI8 bulk metallic glass. The 200 μm Nickel coating can lead to a 9.5% compressive plasticity for the bulk metallic glass. The experimental results show that the confinement and protection of Nickel electroplating on application. metallic glass can play an important role in practical