Two-subgrain single quasicrystals Al–Cu–Co alloy growth and characterisation

Bogdanowicz, W.

doi:10.1016/s0022-0248(01)02330-2

Cited by 14 publications

(15 citation statements)

References 22 publications

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“…In powder X-ray diffraction patterns of this material only reflections, which were previously reported to occur from the decagonal alloys in Ref. [11] were observed. Thermal treatments at 100°C for 20 h and at 900°C for 20 h did not cause any significant changes in the powder diffraction patterns except for the change in the FWHM of the peaks.…”

Section: Methodssupporting

confidence: 53%

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Instability of Al‐Cu‐Co single quasicrystals at low temperature

Bogdanowicz

2005

Cryst. Res. Technol.

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Decomposition process of the Al-Cu-Co single quasicrystals (falling apart into small pieces) after annealing at 100°C for 20 h was studied by X-ray topography, high-resolution electron microscopy, X-ray diffractometry and optical microscopy. It was found that the decomposition of the single quasicrystals is preceded by the creation of a large number of antiphase microdomains and the deformation of the clusters occurs in the two-fold directions of [01100] type. The decomposition begins with the propagation of cracks in the directions of [01100] type.

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Section: Methodssupporting

confidence: 53%

“…Fifteen plate-like single quasicrystals of the Al-Cu-Co alloy were obtained [11]. Each single quasicrystal consisted of two subgrains Q 1 and Q 2.…”

Section: Methodsmentioning

confidence: 99%

Instability of Al‐Cu‐Co single quasicrystals at low temperature

Bogdanowicz

2005

Cryst. Res. Technol.

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“…In diffraction patterns only those reflection occurred which were previously reported to occur from the decagonal Al-Cu-Co alloys [8]. Electron diffraction examination revealed high degree of structural perfection of single quasicrystals [6].…”

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confidence: 65%

“…1a, b) appear in the topograms of single quasicrystals obtained at both of the cooling rates. These bands are related to the antiphase domains occurring at low temperatures in the decagonal Al-Cu-Co alloys [6,8]. At the temperature 900°C these domains do not occur.…”

Section: Discussionmentioning

confidence: 89%

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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“…Decagonal single quasicrystals of Al 73.5 Cu 17.5 Co 9 have been obtained by inclined front crystallization technique [11]. The decagonal phase crystallizes also during the peritectic reaction forming a porous part of the ingot.…”

Section: Methodsmentioning

confidence: 99%

Surface Decorations of Al-Cu-Fe and Al-Cu-Co Single Quasicrystals

et al. 2014

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We studied surface decorations of faceted icosahedral AlCuFe and decagonal AlCuCo single quasicrystals by the scanning electron microscopy using primary and secondary electrons. Both types of single quasicrystals exhibited decorations on their facets, however the character of the decorations was totally dierent. Three kinds of decorations has been developed. On icosahedral Al60Cu26Fe14 quasicrystals we found three kinds of decorations: cellular, cavity type and fractal-like. There was no evident dierence in chemical composition between the inner dodecahedra and the decorations of all types. Surface decorations found on decagonal Al73.5Cu17.5Co9 quasicrystals formed a kind of irregular dendritic stars on the separate bright islands.

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Two-subgrain single quasicrystals Al–Cu–Co alloy growth and characterisation

Cited by 14 publications

References 22 publications

Instability of Al‐Cu‐Co single quasicrystals at low temperature

Instability of Al‐Cu‐Co single quasicrystals at low temperature

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

Surface Decorations of Al-Cu-Fe and Al-Cu-Co Single Quasicrystals

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