Journal Article

FZJ-2017-01047

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ternary phases forming adjacent to Al$_{3}$MnAl$_{4}$Mn in AlMnTM (TM = Fe, Co, Ni, Cu, Zn, Pd)

Grushko, B. (Corresponding author)FZJ* ; Pavlyuchkov, D.FZJ* ; Mi, S. B. ; Balanetskyy, S.

2016
Elsevier Lausanne

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Please use a persistent id in citations: doi:10.1016/j.jallcom.2016.03.220

Abstract: The Alsingle bondMn alloy system contains complex intermetallics in its Al-rich part, and this was the first system where quasiperiodic structures were recognized. In the present work, the solubility of TMs (TM = Fe, Co, Ni, Cu, Zn and Pd) in the stable binaries, the stabilization effect of these elements on the metastable binaries and the formation of ternary compounds are specified and compared. While the solubility of all these TMs in hexagonal μ-Al4Mn and λ-Al4Mn is low, the high-temperature orthorhombic T-Al3Mn dissolves up to at least 14.5, 12, 16 and 7.5 at.% Fe, Cu, Zn and Pd, respectively. The metastable hexagonal φ-Al10Mn3 is stabilized by Fe, Co and Ni in wide ternary compositional regions, and in Alsingle bondCosingle bondMn such a region propagates up to Al5Co2. In alloys with Fe, Co and Ni, a ternary hexagonal phase isostructural to the Alsingle bondCrsingle bondNi ζ-phase (P63/m, a ≈ 1.76, c ≈ 1.25 nm) is formed along ∼80 at.% Al, while in alloys with Cu and Pd the orthorhombic so-called R-phase (Bbmm, a ≈ 2.41, b ≈ 1.25, c ≈ 0.76 nm) was found at similar compositions. This structure is also known in Alsingle bondZnsingle bondMn but at much lower-Al Al68Zn14.5Mn17.5, while in the range of 75–80 at.% Al a monoclinic phase isostructural to η-Al11Cr2 (C2/c, a ≈ 1.76, b ≈ 3.04, c ≈ 1.76 nm, β ≈ 90°) is formed. In addition to the stable decagonal D3-phase in Alsingle bondFesingle bondMn and Alsingle bondPdsingle bondMn reported earlier, the stabilization of binary Alsingle bondMn D3-phase was revealed around Al64Cu20Mn16.

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Contributing Institute(s):

1. Mikrostrukturforschung (PGI-5)

Research Program(s):

1. 143 - Controlling Configuration-Based Phenomena (POF3-143) (POF3-143)

Appears in the scientific report 2016

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; No Authors Fulltext ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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