功能性Ag-Re涂料的电化学形成和表征
Oksana Bersirova1,2, Valeriy Kublanovsky2, Svetlana Kochetova2
1Faculty of Chemistry and Geosciences, Vilnius University, 03225 Vilnius, Lithuania.
Materials (Basel, Switzerland)
|May 14, 2025
概括
研究人员开发了一种新的银 (Ag-Re) 电浴,以创建耐用,功能性涂层. 这些银涂层适用于电力电子和能源应用中的电接触.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
背景情况:
- 开发用于电力电子等苛刻应用的先进材料需要新的沉积技术.
- 基于银的合金具有优良的导电性,但在极端条件下提高其耐用性和性能至关重要.
- 将纳入银涂层可以改善机械性能和热稳定性.
研究的目的:
- 开发和优化用于银- (Ag-Re) 合金涂层的电浴.
- 研究各种参数对Ag-Re沉积物的组成,结构和特性的影响.
- 为特定的工业应用建立功能性Ag-Re涂料的实际合成条件.
主要方法:
- 电化学沉积来自一个新的二银酸烯酸盐浴.
- 系统地改变浴成分,电流密度,温度和添加剂 (乙醇胺).
- 包括电压测量,X射线衍射 (XRD) 和微硬度测试在内的表征技术.
主要成果:
- 实现了耐用,白银色的Ag-Re沉积物 (2.013.7μm) 具有0.1513.5重%的Re和高电流效率 (6698%).
- 确定了单乙胺 (MEA) 作为一个有利于过程激活的添加剂.
- 所有涂层都表现出纳米晶体结构 (粒径为28.535纳米),XRD峰值表明在含量更高的Re沉积物中含有银和氧化物.
- 证明了微硬度的Hall-Petch关系,证实了粒度边界的作用.
结论:
- 具有可控组成 (0.71.5重%Re) 的功能性Ag-Re涂料的稳定电化学合成是可行的.
- 优化的沉积条件 (2.56 mA cm−2,1933 °C) 允许在动力电子和能源领域的实际应用.
- 开发的Ag-Re涂层对在广泛的温度范围内运行的高性能电接触有希望.
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