On the constitution of Al4(Cr,Fe)

Pavlyuchkov, D.; Bauer, Birgitta; Kowalski, W.; Surowiec, M.; Grushko, B.

doi:10.1016/j.intermet.2009.06.002

Cited by 10 publications

(7 citation statements)

References 22 publications

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“…Electron diffraction examinations of a sample annealed at 970 • C revealed an orthorhombic structure with a = 1.24, b = 3.46 and c = 2.04 nm (Fig. 2a-c), similar to that of the Al-Ni-Cr [7] and Al-Fe-Cr [13] -phase. Also its XRD pattern (Fig.…”

Section: Phasesmentioning

confidence: 87%

A contribution to the Al–Pd–Cr phase diagram

Kowalski

Grushko

Pavlyuchkov

et al. 2010

Journal of Alloys and Compounds

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a b s t r a c tThe Al-Pd-Cr alloy system was investigated in the compositional range above 50 at.% Al. The binary Al-Cr phases , , , and ␥ 2 extend up to about 1, 2, 1, 1 and 3 at.% Pd, respectively. The binary Al-Pd , ␦ and ␤-phases dissolve up to 3, 4 and at least 10 at.% Cr, respectively. Five ternary structures were revealed in a quite small compositional range adjusting to that of the Al-Cr -phase. One, resembling the high-temperature Al 3 Mn phase (T-phase, orth. a = 1.47, b = 1.24 and c = 1.25 nm), is formed in a small region around Al 77 Pd 7 Cr 16 composition. A hexagonal structure with a = 1.77 and c = 1.25 nm resembling Al-Ni(Cu)-Cr -phase was revealed around Al 81.5 Pd 1.5 Cr 17 and another hexagonal structure with very close lattice parameters around Al 73 Pd 11 Cr 16 . A ternary Є-phase resembling that in Al-Ni-Cr (orth., a = 1.24, b = 3.46 and c = 2.04 nm) was found at 970 • C around the Al 77.5 Pd 1.5 Cr 21 composition. An additional orthorhombic phase with a = 2.48, b = 3.87 and c = 2.04 nm was found to be formed between

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Section: Phasesmentioning

confidence: 87%

A contribution to the Al–Pd–Cr phase diagram

Kowalski

Grushko

Pavlyuchkov

et al. 2010

Journal of Alloys and Compounds

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“…For Al 4 Cr and Al 4 (Cr,Fe) the situation has revealed to be much more complicated. It was shown, also according to reference,4 that Al 4 (Cr,Fe) is not only the ternary extension of the binary phase Al 4 Cr, but the existence region splits into four regions of structurally similar but yet different phases. Hexagonal Al 4 Cr, also called μ‐Al 4 Cr in literature,6 can only dissolve up to about 1 At‐% iron.…”

Section: Resultsmentioning

confidence: 82%

“…Crystals containing approx. 7 At‐% iron, called H‐phase in a recent publication,4 are next to the limit, where the three‐phase equilibrium between the Al‐rich melt, H‐Al 4 (Cr,Fe) and Al 13 (Fe,Cr) 4 will occur. More specifically the two‐phase result (see Table 1) indicates that this three‐phase equilibrium was reached during growth from the Al 87 Cr 6 Fe 7 initial melt.…”

Section: Resultsmentioning

confidence: 99%

“…X‐ray powder diffraction, electron probe microanalysis (EPMA), and X‐ray topography. From the Al‐rich part of the Al–Cr–Fe phase diagram only an isothermal section at 1000 °C was known,3 which has been revised very recently 4. According to reference3 there are only four phases that can be grown directly from an off‐stoichiometric melt or rather Al‐rich solution: the two binary phases Al 13 Fe 4 and Al 4 Cr and their ternary extensionsAl 13 (Fe,Cr) 4 and Al 4 (Cr,Fe), respectively.…”

Section: Introductionmentioning

confidence: 99%

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Crystal Growth of Al‐Rich Complex Metallic Phases in the System Al–Cr–Fe Using the Czochralski Method

Bauer

Gille

2011

Zeitschrift anorg allge chemie

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Complex metallic phases in the Al-Cr-Fe system are considered to be interesting because of their enhanced resistance against corrosion. Single crystal growth of the Al 4 (Cr,Fe) and Al 13 (Fe,Cr) 4 phases, which is a prerequisite for detailed studies is presented herein for the first time. Along with their binary end members Al 4 Cr and Al 13 Fe 4 growth of cm 3 -size crystals was achieved by using the Czochralski method from Al-rich solutions at temperatures of approximately 1000°C. Special emphasis is put on the refinement of the Al-rich corner of the ternary phase diagram in determining the 1000°C equilibria between the incongruent melts and the corresponding ternary solid solutions. Our findings confirm earlier data on the existence region of Al 13 (Fe,Cr) 4 , but significantly differ from those with respect to the so

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“…was reported to exist in Al-Cr-Fe at the Al80.6Fe8.7Cr10.7 composition[12]. In a more recent study[13], this Al4(Cr,Fe) phase was found to be indeed a ternary extension of the Al-Cr -phase only containing up to 5 at.% Fe.…”

mentioning

confidence: 86%