同时确定非磁性金属的电导率和厚度,使用双面多频旋流技术
A D White1, T A Drouillard1, S Ludwig1
1Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
The Review of scientific instruments
|October 20, 2023
概括
本研究提出了一种简单的多频旋流方法,以快速估计金属的导电性和厚度. 该技术使用易于获得的设备,与光学测量相比,显示出高精度.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 非破坏性测试是指非破坏性测试.
背景情况:
- 精确地描述金属的性能,如导电性和厚度,对于各种工业应用至关重要.
- 传统的表征方法可能是耗时的,昂贵的,或需要专门的设备.
研究的目的:
- 开发和验证一种简单,可访问的多频旋流方法,同时估计金属的导电性,厚度和板材阻力.
- 用一系列非铁金属样本来证明该方法的准确性和可靠性.
主要方法:
- 使用分叉式感应线圈排列来测量带有和没有金属的相互感应变化.
- 将测量的电感比率与分析溶液进行比较.
- 采用数值反转和最小方位适配用于同时进行财产估计.
- 实施校准程序以减轻几何不确定性.
主要成果:
- 同时估计34个金属的导电性和厚度 (厚度为50640μm,导电性为0.85.8 × 10^7 S/m).
- 厚度估计显示与对焦光学测量有很好的一致性 (在1μm以内为<200μm,0.5%为≥200μm).
- 估计的导电率与预期的材料值非常相匹配.
结论:
- 多频旋流方法提供了一种简单,准确和易于使用的方法来表征金属.
- 该技术使用标准的实验室设备和易于制造的固定装置.
- 该方法显示了扩展到更广泛的导电率和厚度范围的潜力.
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