Change in the short-range order in binary Al-Mn melts during partial substitution of manganese atoms by nickel or cobalt.

Autor: Roik, A., Kazimirov, V., Galushko, S., Sokol'skii, V.
Zdroj: Russian Metallurgy (Metally); Jan2013, Vol. 2013 Issue 1, p58-65, 8p
Abstrakt: The structure of ternary melts AlMnNi (at 1233 K) and AlMnCo (at 1393 K), the compositions of which correspond to ternary intermetallic compounds, is studied by X-ray diffraction. Structural models are constructed for the melts using experimental structure factor curves and the reverse Monte Carlo method. The structural models are analyzed by the Voronoi-Delaunay method of partitioning. Local atomic ordering is shown to change noticeably when passing from binary Al-Mn to the ternary melts. The causes of the appearance of a prepeak and the asymmetry of the second maximum in the experimental structure factor curves are discussed. Correlations between the short-range orders in the ternary melts and crystalline and pseudocrystalline phases are found. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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