Complementary observations of defects in quasicrystals by X-ray topography and electron microscopy

Reinier, E.; Mancini, Lucia; Gastaldi, J.; Baluc, N.; Härtwig, J.; Baruchel, J.

doi:10.1016/s0921-4526(98)00366-4

Cited by 34 publications

(18 citation statements)

References 9 publications

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“…We have determined by SEM microanalysis that they are Pd-depleted precipitates, with chemical composition Al 70.63 Pd 7.93 Mn 21.44 . Similar precipitates were already observed to nucleate and to grow, with a crystalline structure, in a sample with the same composition as sample B, during TEM in situ annealing experiments at 800 ë C ( Reinier et al 1997( Reinier et al , 1998. The depth distribution of the holes, as well as their volume fraction, are very di cult to evaluate in this sample because of their high number (about 2´10 3 holes mm -3 ) and irregular shape.…”

Section: 2supporting

confidence: 72%

“…This shows that absorption radiography indeed is not suited for the observation of this type of precipitate. TEM observations, performed after thinning pieces of sample C, also revealed lamellae analogous to the more elongated ones visible on the radiographs ( Reinier et al 1997( Reinier et al , 1998. In order to check the real shape of the elongated precipitates, a stereographic pair of phase radiographs was made at two angles a = 6 8 ë with respect to the perpendicular sample position, the rotation axis being nearly parallel to the longer direction of the lamellae.…”

Section: 2mentioning

confidence: 98%

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Investigation of structural defects and inhomogeneities in Al-Pd-Mn icosahedral quasicrystals by combined synchrotron X-ray topography and phase radiography

Cloetens¹

1998

Philosophical Magazine A

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Phase-sensitive radiography, made possible by the lateral coherence of the beams from third-generation synchrotron-radiation sources, has been combined with monochromatic X-ray topography in an investigation of structural defects and inhomogeneities in the bulk of Al± Pd± Mn icosahedral single quasicrystal grains. Loop-shaped defects previously observed by X-ray topography are thus related with holes and second phase precipitates revealed by phase radiography. The evolution of these defects after annealing provides clues on their nature and formation.

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Section: 2supporting

confidence: 72%

Section: 2mentioning

confidence: 98%

Investigation of structural defects and inhomogeneities in Al-Pd-Mn icosahedral quasicrystals by combined synchrotron X-ray topography and phase radiography

Cloetens¹

1998

Philosophical Magazine A

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“…Two-lobe contrasts were shown in the X-ray topograms of Al-Pd-Mn single quasicrystals in Refs. [1,3,4,7]. Spiral contrast may be related to the spiral steps around the dislocation output on the tenfold growth surface.…”

Section: Discussionmentioning

confidence: 99%

“…The annealing was carried out in a helium atmosphere of high purity. The treatment at 900°C aimed at maximum increase in the single quasicrystals' structural perfection [1,3,4,6,9]. Fig.…”

mentioning

confidence: 99%

Study of Al‐Cu‐Co single quasicrystals by X‐ray topography

Bogdanowicz¹

2005

Cryst. Res. Technol.

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Al-Cu-Co single quasicrystals were studied by the reflective X-ray topography. It was found that on the surfaces of the single quasicrystals, which were parallel to (00001) decagonal plane, the contrast associated with screw dislocation occurs. In the topograms taken from other surfaces of the single quasicrystals the bands of contrast appear. This contrast comes from the antiphase domains and depends on the conditions of the single quasicrystals growth process.

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“…This lack of theoretical consideration is in sharp contrast to the tremendous quantity of experimental results [26][27][28]. Wang et al [29] obtained the analytical expressions as a first-order approximation for the elastic displacement fields induced by spherical inclusions in icosahedral QCs, including both phonon-type and phason-type components.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional analysis of a spheroidal inclusion in a two-dimensional quasicrystal body

Gao

Ricoeur

2012

Philosophical Magazine

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This paper deals with the three-dimensional problem of a spheroidal quasicrystalline inclusion, which is embedded in an infinite matrix consisting of a two-dimensional quasicrystal subject to uniform loadings at infinity. Based on the general solution of quasicrystals in cylindrical coordinates, a series of displacement functions is adopted to obtain the explicit real-form results for the coupled fields both inside the inclusion and matrix, when three different types of loadings are studied: axisymmetric, inplane shear and out-of-plane shear. Furthermore, the present results are reduced to the limiting cases involving inhomogeneities including rigid inclusions, cavities and penny-shaped cracks.

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Complementary observations of defects in quasicrystals by X-ray topography and electron microscopy

Cited by 34 publications

References 9 publications

Investigation of structural defects and inhomogeneities in Al-Pd-Mn icosahedral quasicrystals by combined synchrotron X-ray topography and phase radiography

Investigation of structural defects and inhomogeneities in Al-Pd-Mn icosahedral quasicrystals by combined synchrotron X-ray topography and phase radiography

Study of Al‐Cu‐Co single quasicrystals by X‐ray topography

Three-dimensional analysis of a spheroidal inclusion in a two-dimensional quasicrystal body

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