ISSN:
0142-2421
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
This paper discusses the effect of surface preparation on surface composition as measured by Auger electron spectroscopy (AES). The problems of producing atomistically clean surfaces for calibration standards in quantitative AES analysis are illustrated by comparing the analyses of a series of copper-nickel binary alloys prepared by mechanical polishing and sputter cleaning with the compositions measured immediately after in situ fracture. Mechanical polishing results in surface enrichment by nickel for alloys of less than about 0.6 atomic fraction nickel, while alloys of greater than about 0.7 atomic fraction nickel exhibit surface enrichment by copper after mechanical polishing. Sputter cleaning results in a surface enrichment by nickel for all the alloy compositions considered (Xcu 〈 0.5). Additionally sputtering of the mechanically polished surfaces produces maxima in the surface nickel concentration, after short time sputtering, which coincide with the removal of the oxygen signals from the spectra. The results are discussed using a preferential sputtering model.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/sia.740050406
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