Anodic dissolution behavior of a Zr-based bulk metallic glass and the electrochemical machining of small structures with high geometrical precision and good surface quality
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发表刊物：Precision Engineering
关键字：Bulk metallic glass Electrochemical machining Dissolution behavior Geometrical precision Surface quality
摘要：Bulk metallic glasses (BMGs) have excellent mechanical properties, however, it is still challenging to process high-qualtiy BMG structures for their widespread engineering applications. In this work, electrochemical machining (ECM) is adopted to process various small BMG structures with high geometrical precision and surface quality. Firstly, the electrochemical dissolution behavior of a Zr57Cu20Al10Ni8Ti5 (at.%) BMG in NaNO3, H3PO4, NaCl, and HCl solutions was investigated and discussed. The results shown that obvious corrosion occurred in HCl and NaCl solutions, while mass by-products and pitting corrosion on the workpiece surface in NaCl solution affect the corrosion continuity and surface quality. Therefore, the HCl solution is selected as the electrolyte for the following ECM process. Secondly, the effects of machining parameters on the ECM performance of BMG workpieces were investigated, where the optimal machining performance was achieved with an electrolyte of 0.1 mol/L HCl, a cathode feed rate of 3 μm/s, a machining voltage of 10 V, and a duty cycle of 15%. Finally, a small round hole with a roughness (Ra) of about 0.2 μm, a sidewall taper of less than 2.83°, and a relative error of diameters of 2.1% was obtained. Another square structure (0.899 mm × 0.891 mm) with high geometrical precision and surface quality was also achieved by the optimal parameters, which validates the feasibility to machine small BMG structures using the ECM technique with its optimal parameters.
合写作者：岳小康,刘洋,许海涛
第一作者：张聚臣
论文类型：期刊论文
通讯作者：陈顺华
学科门类：工学
文献类型：J
卷号：89
是否译文：否
发表时间：2024-08-01
收录刊物：SCI