Production and characterization of single quasicrystals of the Al-Pd-Mn icosahedral phase

Boudard, Michel; Bourgeat-Lami, E.; Boissieu, M. de; Janot, Chr.; Durand‐Charre, M.; Klein, Holger; Audier, M.; Hennion, B.

doi:10.1080/09500839508240508

Cited by 55 publications

(31 citation statements)

References 18 publications

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“…The refiners were particles of Al-5 wt% Ti-1 wt% B, with a diameter of about 1 mm. AlPdMn samples were prepared at the composition for which it is expected that quasicrystal grows as soon as the solidification starts: Al 72.4 Pd 20.5 Mn 7.1 [12]. Quasicrystal sample thickness was about 700 mm.…”

Section: Experimental Apparatus and Samplesmentioning

confidence: 99%

Application of synchrotron X-ray imaging to the study of directional solidification of aluminium-based alloys

Schenk

Thi

Gastaldi

et al. 2005

Journal of Crystal Growth

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Section: Experimental Apparatus and Samplesmentioning

confidence: 99%

Application of synchrotron X-ray imaging to the study of directional solidification of aluminium-based alloys

Schenk

Thi

Gastaldi

et al. 2005

Journal of Crystal Growth

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“…This is partly due to the relatively recent availability of single grains of sufficient size for surface studies. [22][23][24][25][26][27][28] Much of the heightened interest, however, is due to reports of unusual surface properties such as oxidation resistance, 29,30 low surface friction, 31,32 superior wear resistance, and other tribological characteristics. 31 Because of these properties, quasicrystalline alloys may find important technological applications, including surface coatings for wear resistance in corrosive environments.…”

Section: Introductionmentioning

confidence: 99%

Fivefold surface of quasicrystalline AlPdMn: Structure determination using low-energy-electron diffraction

et al. 1998

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The atomic structure of the fivefold symmetric quasicrystal surface of icosahedral AlPdMn has been investigated by means of a dynamical low-energy-electron diffraction (LEED) analysis. Approximations were developed to make the structure of an aperiodic, quasicrystalline surface region accessible to LEED theory. A mix of several closely similar, relaxed, bulklike lattice terminations is favored, all of which have a dense Al-rich layer on top followed by a layer with a composition of about 50% Al and 50% Pd. The interlayer spacing between these two topmost layers is contracted from the bulk value by 0.1 Å, to a final value of 0.38 Å, and the lateral density of the two topmost layers taken together is similar to that of an Al(111) surface. The LEED structural result is qualitatively consistent with data from ion scattering spectroscopy, which supports an Alrich termination. Keywords Ames Laboratory, Physics and Astronomy Disciplines Biological and Chemical Physics | Physical Chemistry CommentsThis article is from Physical Review B 57, no. 13 (1998) The atomic structure of the fivefold symmetric quasicrystal surface of icosahedral AlPdMn has been investigated by means of a dynamical low-energy-electron diffraction ͑LEED͒ analysis. Approximations were developed to make the structure of an aperiodic, quasicrystalline surface region accessible to LEED theory. A mix of several closely similar, relaxed, bulklike lattice terminations is favored, all of which have a dense Al-rich layer on top followed by a layer with a composition of about 50% Al and 50% Pd. The interlayer spacing between these two topmost layers is contracted from the bulk value by 0.1 Å, to a final value of 0.38 Å, and the lateral density of the two topmost layers taken together is similar to that of an Al͑111͒ surface. The LEED structural result is qualitatively consistent with data from ion scattering spectroscopy, which supports an Al-rich termination. ͓S0163-1829͑98͒03713-8͔

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“…In other quasicrystals, those of the chemical system Al±Pd±Mn [32], centimetre size single grains can be obtained using the Czochralski growth technique. For these samples, and when the alloy composition has carefully been optimised, only Q c dependent broadening of the Bragg peaks is observed, without any shifting nor splitting.…”

Section: Phason Defects and Fluctuation In Real Quasicrystalsmentioning

confidence: 99%

Special Defects in Quasicrystals

Janot

Loreto

Farinato

2000

phys. stat. sol. (b)

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Production and characterization of single quasicrystals of the Al-Pd-Mn icosahedral phase

Cited by 55 publications

References 18 publications

Application of synchrotron X-ray imaging to the study of directional solidification of aluminium-based alloys

Application of synchrotron X-ray imaging to the study of directional solidification of aluminium-based alloys

Fivefold surface of quasicrystalline AlPdMn: Structure determination using low-energy-electron diffraction

Special Defects in Quasicrystals

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