X-ray diffraction study of decagonal Al—Co—Ni as a function of composition

Verfasser / Beitragende:
[Sergiy Katrych, Walter Steurer]
Ort, Verlag, Jahr:
2004
Enthalten in:
Zeitschrift für Kristallographie - Crystalline Materials, 219/10(2004-10-01), 606-613
Format:
Artikel (online)
ID: 378883984
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024 7 0 |a 10.1524/zkri.219.10.606.50824  |2 doi 
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245 0 0 |a X-ray diffraction study of decagonal Al—Co—Ni as a function of composition  |h [Elektronische Daten]  |c [Sergiy Katrych, Walter Steurer] 
520 3 |a The evolution was studied of structural order/disorder phenomena across the wide stability field of the decagonal phase in the system Al—Co—Ni. Full single-crystal X-ray diffraction data sets were collected of 31 samples annealed at 900 °C. Based on reciprocal space reconstructions of the imaging-plate-scanner data, the variation in Bragg as well as in diffuse scattering is discussed in detail. The samples were also characterized metallographically, by powder X-ray diffraction, differential thermal analysis and energy-dispersive X-ray spectroscopy. The (quasi)lattice parameters vary smoothly over the stability range of decagonal Al71.5Co28.5—xNix (8 ≤ x ≤ 20). A smooth variation is also observed for the diffuse scattering related to the ≈8 Å superstructure. These observations indicate a continuous ordering process at 900 °C from the basic Co-rich phase via the type II and type I superstructures to the basic Ni-rich phase. 
540 |a © 2004 Oldenbourg Wissenschaftsverlag GmbH 
690 7 |a Crystallography  |2 nationallicence 
690 7 |a Inorganic chemistry  |2 nationallicence 
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