Tribological properties of a B2-type Al-Pd-Mn quasicrystal approximant
- 1 June 2003
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 18 (6) , 1447-1456
- https://doi.org/10.1557/jmr.2003.0199
Abstract
The tribological properties of a B2-type Al–Pd–Mn quasicrystal approximant were investigated and compared with those of an Al–Pd–Mn icosahedral quasicrystal. The approximant was of the _ phase, having a crystalline CsCl-type structure and nominal composition Al48Pd42Mn10. Friction coefficients measured in ultrahigh vacuum between a pair of Al48Pd42Mn10 samples having truly clean surfaces were found to be twice as high as those reported for the Al70Pd21Mn9 quasicrystal. When the surfaces were oxidized by exposure to O2 or H2O, the friction coefficients decreased by roughly a factor of two for both materials but the friction coefficient for the approximant remained roughly twice that of the quasicrystal. The rate of oxidation of the approximant was found to be one order of magnitude higher than that of the quasicrystal. This corroborates findings that suggest that quasicrystals exhibit an inherent resistance to oxidation and corrosion. Vickers hardness measurements show that the quasicrystal is roughly three times as hard as the approximant.Keywords
This publication has 29 references indexed in Scilit:
- Towards applications of quasicrystalsPublished by Elsevier ,2003
- Surface oxidation of the Al62Cu25.5Fe12.5icosahedral quasicrystalPhilosophical Magazine A, 2000
- Friction between single-grain Al70Pd21Mn9 quasicrystal surfacesSurface Science, 1999
- Surface Science of QuasicrystalsPublished by Springer Nature ,1999
- Surface oxidation of Al-Cu-Fe alloys: A comparison of quasicrystalline and crystalline phasesPhilosophical Magazine Part B, 1999
- Crystalline surface structures induced by ion sputtering of Al-rich icosahedral quasicrystalsPhysical Review B, 1998
- Influence of the annealing atmosphere on the formation of Al–Cu–Fe quasicrystalsJournal of Materials Research, 1995
- Lubrication by molecular monolayers at Ni–Ni interfacesJournal of Vacuum Science & Technology A, 1992
- Mechanical properties of single-quasicrystalline AlCuCoSiJournal of Materials Research, 1991
- Quasicrystalline low-friction coatingsJournal of Materials Science Letters, 1991