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 language | English |
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Pages (from-to) | 433-435 |
Number of pages | 3 |
Journal | Surface and Interface Analysis |
Volume | 40 |
Issue number | 3-4 |
DOIs | |
State | Published - Mar 2008 |
Externally published | Yes |
Keywords
- Al-Pd-Mn
- LEIS
- Preferential sputtering
- Segregation