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首页> 外文会议>Advances in X-ray analysis (ICDD2001) >A NON-DESTRUCTIVE X-RAY FLUORESCENCE METHOD FOR ANALYSIS OF METAL ALLOY WIRE SAMPLES
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A NON-DESTRUCTIVE X-RAY FLUORESCENCE METHOD FOR ANALYSIS OF METAL ALLOY WIRE SAMPLES

机译：金属合金丝样品分析的非破坏性X射线荧光法

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摘要

Although quantitative analysis of metal alloys is typically accomplished by wet-chemical techniques, complete dissolution of some metal alloys can be difficult. Here, we report an alternative non-destructive energy-dispersive x-ray fluorescence (EDXRF) method for determination of nickel, gold, copper, and silver in metal alloy wires. Sample preparation is simple and consists of mounting wires as a single strand in machined polyethylene sample cups. Wires are analyzed in two symmetrical positions nearly parallel to the x-ray beam, thereby improving the external reproducibility of the analysis. Ideally, standards and samples are matched in terms of chemical composition and diameter. For 50 mil copper-silver wire, four certified reference wires consisting of various copper-silver compositions and matching the unknown diameter were used. However, we also investigated standards of different elemental composition and thickness. For analysis of 25 mil nickel-gold wires, 20 mil NIST standard wires consisting of copper-gold were applied for standardization and compared with certified 25 mil nickel-gold standards. Variations in wire diameter were corrected using an infinite thickness approximation, and nickel intensities were calculated from the copper intensities using a fundamental parameters calculation. The standard curves obtained from both approaches are similar, indicating that wires of varying thickness and composition can be applied as standards. Analysis of copper-silver and nickel-copper wire "unknowns" agrees with certified values to better than 0.3 wt %. We conclude that this rapid, non-destructive method could be a useful alternative to wet-chemical methods for many applications.
机译：尽管金属合金的定量分析通常是通过湿化学技术完成的，但某些金属合金的完全溶解可能会很困难。在这里，我们报告了另一种非破坏性能量色散X射线荧光（EDXRF）方法，用于测定金属合金丝中的镍，金，铜和银。样品制备很简单，并且将电线作为单股安装在机加工的聚乙烯样品杯中。在几乎平行于X射线束的两个对称位置分析导线，从而提高了分析的外部可重复性。理想情况下，标准品和样品在化学成分和直径方面要匹配。对于50 mil的铜银线，使用了四根经过认证的参比导线，这些参比导线由各种铜银成分组成并匹配未知直径。但是，我们还研究了不同元素组成和厚度的标准品。为了分析2500万镍金线，将2000万由铜金构成的NIST标准线用于标准化，并与经过认证的2500万镍金标准线进行比较。使用无限大的厚度近似来校正导线直径的变化，并使用基本参数计算从铜强度计算出镍强度。从这两种方法获得的标准曲线相似，表明可以将不同厚度和成分的导线用作标准线。对铜-银和镍-铜线的分析“未知”与标准值一致，优于0.3 wt％。我们得出的结论是，对于许多应用而言，这种快速，无损的方法可以替代湿化学方法。

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