Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/43062

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Title
Study of preferential sputtering and segregation effects on the surface composition of Al-Pd-Mn quasi-crystals
Author/Creator
Samavat, Feridoun;  Gladys, Michael J.;  Jenks, Cynthia J.;  Lograsso, Thomas A.;  King, Bruce V.;  O'Connor, D. John
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Mathematical and Physical Sciences
Description
Using 2KeV He⁺ and Ne⁺ low-energy ion scattering (LEIS), it was found that the Al/Pd concentration ratio at the surface of a nominally Al₆₉.₉Pd₂₀.₅Mn₉.₆ quasi-crystal decreases to a steady-state value under bombardment as a result of preferential sputtering. Sputtering of an annealed surface results in a significant increase in Mn concentration on the surface which remained at annealing temperatures below 575 K. Variations of the Mn/Pd and Al/Pd ratios have been measured by LEIS as a function of temperature in the range 295-975 K for clean-annealed and sputtered surfaces. The results show that Al/Pd ratio does not significantly change from 295 to 575 K for both He⁺ and Ne⁺ but increases with sample temperatures up to 875 K.
Relation
Surface and Interface Analysis Vol. 40, Issue 3-4, p. 433-435
Publisher Link
http://dx.doi.org/10.1002/sia.2769
Date
2008
Publisher
John Wiley & Sons
Keyword(s)
preferential sputtering;  segregation;  Al-Pd-Mn;  LEIS;  energy ion scattering;  ALPDMN
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/43062
Identifier
ISSN:0142-2421
Reviewed
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Subject
"Surface and Interface Analysis"
 
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