Continuous electropolishing technique for long-length Hastelloy C-276 tape
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Preparation of the second-generation high-temperature superconducting tape by ion beam-assisted deposition (IBAD) requires a flat metal substrate. In this work, the electrochemical polishing of long-length Hastelloy C-276 alloy was studied, and its process parameters, characterized roughness and other properties were investigated. A 10-meter-long Hastelloy C-276 alloy was prepared by electrochemical polishing. The following optimized processing parameters are obtained: temperature of 45 °C, current density of 0.439 A·cm−2 and polishing time of 60 s. The average roughness value (Ra) of the surface is less than 5 nm (5 μm × 5 μm), which was characterized by atomic force microscopy. This value satisfies the requirements for the further preparation of transition-layer pair by the IBAD technology route.
KeywordsHastelloy C-276 alloy Electrochemical polishing Atomic force microscopy Current density
This study was financially supported by the National Science Foundation of China (Nos. 51571002, 51401003) and the Beijing Municipal Natural Science Foundation (Nos. 2172008, KZ201310005003).
- Paranthaman MP, Aytug T, Stan L, Jia Q, Cantoni C, Wee SH. Chemical solution derived planarization layers for highly aligned IBAD–MgO templates. Supercond Sci Technol. 2014;27(27):1106.Google Scholar
- Hu YN, Zhou H, Liao LP, Deng HB. Surface quality analysis of the electropolishing of cemented carbide. J Mater Process Technol. 2013;139(1):253.Google Scholar
- Qu F, Liu HZ, Yang J, Gu HW. Electrochemical polishing of cubic texture Ni substrates for coated conductors. Chin J Rare Met. 2006;30(4):545.Google Scholar
- Feng F, Liu R, Chen H, Shi K, Wang Z, Wu W, Han Z. Substrate surface treatment and YSZ buffer layers by IBAD method for coated conductors. Physica C. 2009;469(15–20):1367.Google Scholar