ISSN:
0142-2421
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
Sulphur segregation levels on various grains of a polycrystalline nickel sample have been measured. If the high-energy nickel Auger signal is used as a reference, variations of up to 30% in the S/Ni ratio are seen. This large change in sulphur level results from crystallographic effects, as evidenced by the different variation of the high- and low-energy nickel Auger signals as the specimen tilt angle is varied. Of the two processes responsible for such effects, primary beam channelling and Auger electron diffraction, the latter is found to be important.Use of the background as a reference reduced the variation of the sulphur signal to within the error bars of the measurement of ∽10%.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
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