In:
Zeitschrift für Naturforschung A, Walter de Gruyter GmbH, Vol. 45, No. 5 ( 1990-5-1), p. 627-638
Abstract:
Amorphous and quasicrystalline samples of Al 84 Mn 16 and Al 84 V 16 were produced by sputtering and melt-spinning, respectively. From X-ray and neutron-diffraction-results the total structure factors were evaluated. For amorphous as well as for quasicrystalline Al 84 V 16 the partial S Al-Al - and S Al-V -structure factors were obtained, which yield the corresponding partial pair correlation functions, the atomic distances, and the partial coordination numbers. Also some information concerning the partial Bhatia-Thornton correlation functions could be obtained. Both the amorphous and the quasicrystalline Al-V-alloys show a linear expansion by a factor of 1.03 compared to the corresponding Al-Mn-alloy. The two amorphous alloys can be designed as isomorphous, whereas the quasicrystalline ones show pronounced deviations in the distance between unequal atoms. The shortest atomic distance in amorphous Al 84 V 16 is 2.69 A, being,formed by Al-V-pairs with a coordination number 2. The nearest Al-Al-distance amounts to 2.84 A with a coordination number 8. The partial density-concentration correlation function clearly deviates from the hard sphere model. With the quasicrystalline specimens, the isomorphous substitution of Mn- and V-atoms is not perfect. The Al-V-correlation is split up, and this is not observed for the Al-Mn-correlation. Comparison of the amorphous and the corresponding quasicrystalline alloy shows some similarities
Type of Medium:
Online Resource
ISSN:
1865-7109
,
0932-0784
DOI:
10.1515/zna-1990-0507
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
1990
detail.hit.zdb_id:
2079610-9
detail.hit.zdb_id:
124634-3
detail.hit.zdb_id:
124633-1
detail.hit.zdb_id:
2767412-5
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