Study of preferential sputtering and segregation effects on the surface composition of Al-Pd-Mn quasi-crystals

Title: Study of preferential sputtering and segregation effects on the surface composition of Al-Pd-Mn quasi-crystals
Creator: Samavat, Feridoun; Gladys, Michael J.; Jenks, Cynthia J.; Lograsso, Thomas A.; King, Bruce V.; O'Connor, D. John
Relation: Surface and Interface Analysis Vol. 40, Issue 3-4, p. 433-435
Publisher Link: http://dx.doi.org/10.1002/sia.2769
Publisher: John Wiley & Sons
Resource Type: journal article
Date: 2008
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.
Subject: preferential sputtering; segregation; Al-Pd-Mn; LEIS; energy ion scattering; ALPDMN
Identifier: uon:5191
Identifier: http://hdl.handle.net/1959.13/43062
Identifier: ISSN:0142-2421
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