Electrochemical micromachining of passive electrodes – Application to bulk metallic glasses
Electrochemical micromachining of passive electrodes – Application to bulk metallic glasses
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DOI：
10.1016/j.jmatprotec.2014.12.023
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发表时间：
2015-05
影响因子：
6.3
通讯作者：
R. Sueptitz;S. Horn;M. Stoica;M. Uhlemann;A. Gebert
中科院分区：
文献类型：
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作者：
R. Sueptitz;S. Horn;M. Stoica;M. Uhlemann;A. Gebert
电化学微加工（ECMM）是一种对金属材料进行微成形的方法，与其硬度无关，并且不会在工件中引入显著的热量。因此，它似乎非常适合于块体金属玻璃（BMG）的微成形。以Fe基非晶合金Fe 65.5Cr4Mo4Ga4P12C5B5.5为例，讨论了ECMM利用过钝化溶解机制的能力。玻璃态合金在酸性电解质水溶液中表现出自发钝化性。由于其低Cr含量，ECMM期间的电化学行为与不锈钢的电化学行为不可比较，因此，既定的实验条件不适用。的ECMM设置的电子行为进行了讨论与加工过程中的电化学反应。结果，不同的方法加工的玻璃态Fe 65.5Cr4Mo4Ga4P12C5B5.5合金在酸性电解质水溶液中导出和方法，以提高电效率进行了讨论：添加氧化剂的加工电解质和肖特基二极管的电子设置中的应用。
Electrochemical micromachining (ECMM) is a method for micro-forming of metallic materials independent of their hardness and without inducing significant heat into the work piece. Thus, it appears to be well suited for micro-shaping of bulk metallic glasses (BMGs). On the example of a Fe-based BMG, Fe65.5Cr4Mo4Ga4P12C5B5.5, the capability of ECMM exploiting the transpassive dissolution regime is discussed. The glassy alloy exhibits spontaneous passivity in aqueous acidic electrolytes. Due to its low Cr content the electrochemical behaviour during the ECMM is not comparable to that of stainless steel and therefore, established experimental conditions are not applicable. The electronic behaviour of the ECMM setup is discussed in relation with the electrochemical reactions during the machining. Resultant, different ways of machining the glassy Fe65.5Cr4Mo4Ga4P12C5B5.5alloy in an aqueous acidic electrolyte are derived and ways to enhance the electric efficiency are discussed: the addition of an oxidant to the machining electrolyte and the application of a Schottky diode in the electronic setup.