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

Feridoun Samavat, Michael J. Gladys, Cynthia J. Jenks, Thomas A. Lograsso, Bruce V. King, D. John O'Connor

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Using 2 keV 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.

Original languageEnglish
Pages (from-to)433-435
Number of pages3
JournalSurface and Interface Analysis
Volume40
Issue number3-4
DOIs
StatePublished - Mar 2008
Externally publishedYes

Keywords

  • Al-Pd-Mn
  • LEIS
  • Preferential sputtering
  • Segregation

Fingerprint

Dive into the research topics of 'Study of preferential sputtering and segregation effects on the surface composition of Al-Pd- Mn quasi-crystals'. Together they form a unique fingerprint.

Cite this