STUDIES ON APERIODIC CRYSTALS IN Al-Mn AND Al-V ALLOYS BY MEANS OF TRANSMISSION ELECTRON MICROSCOPY

Urban, K.; Mayer, Joachim; Rapp, M.; Wilkens, M.; Csanády, Ágnes; Fidler, J.

doi:10.1051/jphyscol:1986347

Cited by 18 publications

(15 citation statements)

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“…The two maxima of the second ring coincide with the (101000) and the (110010) ring, respectively. Such a correlation was also found in the case of Al-14 at-%Mn [9,12] …”

Section: Methodssupporting

confidence: 59%

“…On the other hand, there is clear evidence that in a large family of metallic glasses chemical effects are important for the details of the structure, which deviates considerably from that expected on purely geometrical grounds [14,15]. Although our results and in particular the phase-transformation studies reported in [9,12,13] suggest a special structural relationship between the quasicrystalline and the amorphous state final conclusions can only be drawn after the partial structure factors, pair correlation functions, and coordination numbers have been determined.…”

Section: Discussioncontrasting

confidence: 53%

“…The relative contribution of the different types of atom pairs to the total correlation function can be estimated calculating the coefficients in (12), inserting the atomic scattering factors for Q x [23]:…”

Section: Pair Correlation Functionmentioning

confidence: 99%

“…In order to elucidate this question further we have studied Al-16 at-%V which is another alloy, which, from the quasicrystalline state, can be transformed to the amorphous state by electron irradiation [12,13]. The Al-V material obtained by melt spinning is not homogeneously quasicrystalline.…”

Section: Introductionmentioning

confidence: 99%

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Electron-Diffraction Study on an Amorphous Al-V Alloy Produced by Electron Irradiation of Quasicrystalline Al-16 at-%V

Mayer

Urban

Härle

et al. 1987

Zeitschrift Für Naturforschung A

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Quasicrystalline Al-16 at-%V was transformed to the amorphous state by low-temperature electron irradiation in a high-voltage electron microscope. Electron diffraction experiments were carried out in the amorphous state and in the crystalline state obtained after subsequent heat treatment. From the results the total structure factor was determined. The pair correlation function was calculated which yields the radii of the different coordination spheres and the total coordination number. The results are discussed in terms of current topological models of the structure of metallic glasses.

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“…The two maxima of the second ring coincide with the (101000) and the (110010) ring, respectively. Such a correlation was also found in the case of Al-14 at-%Mn [9,12] …”

Section: Methodssupporting

confidence: 59%

Section: Discussioncontrasting

confidence: 53%

Section: Pair Correlation Functionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electron-Diffraction Study on an Amorphous Al-V Alloy Produced by Electron Irradiation of Quasicrystalline Al-16 at-%V

Mayer

Urban

Härle

et al. 1987

Zeitschrift Für Naturforschung A

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“…4b and c), and finally they disappear almost completely after about four minutes irradiation (Fig. 4d) [11]. They have shown that the quasicrystalline phases transform into nearly complete amorphous structure.…”

Section: Expérimental Proceduresmentioning

confidence: 89%

Electron-beam irradiation effects in Al-Ni-Co decagonal quasicrystal

Edagawa

Suzuki

Ichihara

et al. 1993

Microsc. Microanal. Microstruct.

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Abstract. 2014 By observing the change of the diffraction pattern and the lattice image, structural changes by electron beam irradiation have been investigated for Al-Ni-Co ordered decagonal quasicrystal, which was recently identified by the present authors. By 100 kV electron beam irradiation, essentially no change was detected in the diffraction pattern even after half an hour exposure to the electron beam. On the other hand, by 300 kV irradiation, drastic changes were observed after only a few minutes of irradiation; in the diffraction pattern the diffraction spots became diffuse and all the ordered spots and weak main spots disappeared; in the lattice image, the characteristic ring contrast in the decagonal phase became indistinct. However, no reconstruction of the ring pattern was recognized, suggesting that the phason strains, if introduced, are limited to components of wavelength shorter than the inter-ring distances (~ 2 nm).

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Quasicrystal and Its Properties

Fan¹

2016

Mathematical Theory of Elasticity of Quasicrystals and Its Applications

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STUDIES ON APERIODIC CRYSTALS IN Al-Mn AND Al-V ALLOYS BY MEANS OF TRANSMISSION ELECTRON MICROSCOPY

Cited by 18 publications

References 0 publications

Electron-Diffraction Study on an Amorphous Al-V Alloy Produced by Electron Irradiation of Quasicrystalline Al-16 at-%V

Electron-Diffraction Study on an Amorphous Al-V Alloy Produced by Electron Irradiation of Quasicrystalline Al-16 at-%V

Electron-beam irradiation effects in Al-Ni-Co decagonal quasicrystal

Quasicrystal and Its Properties

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