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Surface Preparation of Solid Metallic Samples for X-Ray Spectrochemical Analysis

Published online by Cambridge University Press:  06 March 2019

R.E. Michaelis and
Betty Ann Kilday
R.E. Michaelis
Affiliation:
National Bureau of Standards Washington, D.C
Betty Ann Kilday
Affiliation:
National Bureau of Standards Washington, D.C
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Abstract

In X-ray spectrochemical determinations, the surface preparation of metal samples is important since the emitted secondary radiation is absorbed except for that emerging from the immediate surface. Surface preparation also has been found to be a critical factor in eliminating or at least in minimizing the effects of certain metallurgical changes among or within samples on the X-ray determinations. For example, a change of particle size of an undissolved constituent, or a change in grain size, may markedly influence the X-ray analysis, depending on the surface preparation. A metallographic polishing technique, whereby the sample surfaces were finished with ¼μ diamond dust, was reported for the determination of lead in leaded steel (Kilday and Michaelis, in press). This investigation has been extended to other materials such as hypereutectic silicon-aluminum alloy and white-cast iron. A comparison is made of the effects of different surface preparations on X-ray determinations.

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Type
Research Article
Information
Advances in X-Ray Analysis , Volume 5: Tenth Annual Conference on Applications of X-ray Analysis, August 7-9, 1961 , 1961, pp. 405 - 411
Copyright
Copyright © International Centre for Diffraction Data 1961

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References

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