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所属单位：机电学院

发表刊物：JOURNAL OF ALLOYS AND COMPOUNDS

关键字：Metallic glass Carbon nanotube fiber Wire electrochemical micro machining Mass transport Hydrophilicity

摘要：Metallic glasses are promising materials for realizing high-performance micro devices in micro electromechanical systems (MEMS) owing to their excellent functional and structural characteristics. A significant limitation to their application is the challenge of shaping them on a microscale. A technique of wire electrochemical micromachining (WECMM) with a carbon nanotube fiber (CNF) as tool electrode is proposed for microstructure fabrication of metallic glass. WECMM is a type of electrochemical micro machining (ECMM) that is increasingly recognized as a flexible and effective technology to fabricate complex-shaped micro components. Taking the example of a Ni-based metallic glass, Ni72Cr19Si7B2, the polarization and fabrication characteristics in dilute acid electrolytes are investigated. As the machining gap is very small in WECMM, efficient mass transport is extremely important to, improve the machining efficiency, stability, and quality, The efficiency of enhancing mass transport using a CNF electrode in this work is shown by flow-field simulation and hydrophilicity analysis, as well as experimental investigation. The maximum feed rate can be doubled and the homogeneity of machined slits improved more than five times compared with the results obtained using a smooth tungsten wire. Finally, complex microstructures based on metallic glass are fabricated by WECMM using a CNF electrode successfully. (C) 2017 Elsevier B.V. All rights reserved.

ISSN号：0925-8388

是否译文：否

发表时间：2017-06-30

合写作者：Meng, Lingchao,Zeng, Yongbin,朱荻

通讯作者：房晓龙