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郑利珊,袁心强,雷婷.脉冲周期对黄金电沉积层的影响[J].稀有金属材料与工程(英文),2019,48(6):1797~1802.[Zheng Lishan,Yuan Xinqiang and Lei Ting.Influence of Pulse Period of Bidirectional Pulse Electrodeposition Process on the Properties of Electroformed Layer of Gold[J].Rare Metal Materials and Engineering,2019,48(6):1797~1802.]
Influence of Pulse Period of Bidirectional Pulse Electrodeposition Process on the Properties of Electroformed Layer of Gold
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Received:November 19, 2017  Revised:March 15, 2018
DOI:
Key words: Bidirectional pulse  Pulse period  Vickers hardness  Non-cyanide electrodeposition
Foundation item:中国地质大学(武汉)珠宝检测技术创新中心开放基金(CJHIXM-S201615)
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Zheng Lishan,Yuan Xinqiang and Lei Ting  
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Abstract:
      Electroformed gold layers were prepared by bidirectional pulse electrodeposition process, with thickness up to 150μm in 20h from cyanide-free bath. Through single variable experiment, which the pulse period was treated as a single variable, we studied the effect of pulse period on the properties of electroformed layer of gold using bidirectional pulse power. Scanning Electron Microscopy, X-ray Diffraction, and Vickers hardness test were used to research the surface mophology, average crystal size and hardness of electroformed gold layers. Results showed the microhardness of electroformed layer of gold is higher when pulse period changes between 45ms and 75ms, which can reach to 117HV0.1. Strong (111) preferred orientation can result in more flat micro surface and higher micohardness of electroformed gold layers.