Electrochemical micromachining of ZrCu-based amorphous alloy in ethylene glycol solution
Electrochemical micromachining of ZrCu-based amorphous alloy in ethylene glycol solution
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DOI：
10.1016/j.intermet.2021.107155
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发表时间：
2021-03-02
期刊：
影响因子：
4.4
通讯作者：
Zeng Yongbin
中科院分区：
文献类型：
--
作者：
Hang Yusen;Yang Tao;Zeng Yongbin
ZrCu基非晶合金具有优异的物理、化学和力学性能，作为先进的功能和结构材料，在军事、航空航天和精密器件等领域具有广泛的应用前景。将微细电化学加工技术应用于非晶合金的加工，对Zr 67 Cu 15 Ni 11 Al 4 Ti 3非晶合金进行了线切割微细电化学加工。分析了该合金在水溶液中的溶解特性和溶解过程，以了解该ZrCu基非晶合金的WECMM。与不含Cu的Zr基非晶态合金不同，在本发明的情况下，Cu被快速电解，并且在其被离子化之后在阴极的表面上产生大量的产物沉积，从而严重阻碍加工。与水溶液中的纯电荷转移控制过程不同，合金在乙二醇溶液中的极化过程由电荷转移和扩散共同控制。在乙二醇溶液中，两相双电层包括致密层和扩散层，离子在阴极和阳极之间移动相对较慢，产物形成相对较慢。这是有效的，在（i）加强反向电场效应的双极脉冲，（ii）阻碍迁移的阳离子的阴极，和（iii）直接避免形成的产品，从而允许形成高品质的微观结构的ZrCu基非晶合金具有相对较大的厚度为550？M.
Their excellent physical, chemical, and mechanical properties give ZrCu-based amorphous alloys a wide range of application prospects as advanced functional and structural materials for military and aerospace uses and in precision devices. Micro-electrochemical technology has been used to process amorphous alloys, and this paper reports the wire electrochemical micro-machining (WECMM) of the Zr67Cu15Ni11Al4Ti3 amorphous alloy. The dissolution characteristics and processing of the alloy in aqueous solutions are analyzed to understand the WECMM of this ZrCu-based amorphous alloy. Unlike with Cu-free Zr-based amorphous alloys, the Cu in the present case is electrolyzed quickly and generates a large amount of product deposition on the surface of the cathode after it is ionized, thereby seriously hindering the processing. Unlike the pure charge-transfer control process in an aqueous solution, the polarization process of the alloy in a glycol solution is controlled by both charge transfer and diffusion. In a glycol solution, the two-phase electric double layer comprises a compact layer and a diffusion layer, ions move relatively slowly between the cathode and anode, and products form relatively slowly. This is effective in (i) strengthening the reverse electric field effect of the bipolar pulse, (ii) hindering the migration of cations to the cathode, and (iii) directly avoiding the formation of products, thereby allowing the formation of high-quality micro-structures of ZrCu-based amorphous alloy with a relatively large thickness of 550 ?m.