A reinvestigation of the γ phase in CuAl alloys: a new long-period superstructure

Sande, M. Van; Landuyt, J. Van; Avalos-Borja, M.; Villaseñor, Gabriel Torres; Amelinckx, S.

doi:10.1016/0025-5416(80)90173-1

Cited by 13 publications

(2 citation statements)

References 17 publications

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“…Murray [2] accepted the experimental work of Funamizu [18] in their review, which did not indicate any phase being present between the c¢-phase and d-phase. Van Sande [19] studied the Al-Cu phase diagram using Table I. very slow-cooling experiments and confirmed the presence of a two-phase equilibrium between the c¢ and d-phases. Ponweiser et al [1] did not find any other equilibrium phase in this region but marked the whole composition area with a question mark because they were unable to clearly separate the two c¢ and d single phase regions using their combined EDX and Rietveld refinement results.…”

Section: B Literature Reviewmentioning

confidence: 87%

Experimental Description of the Al-Cu Binary Phase Diagram

Zobač

Kroupa

Zemanová

et al. 2019

Metall Mater Trans A

101

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The phase diagram of the Al-Cu binary system was reinvestigated experimentally. The current study was designed to contribute to a better description of those parts of the phase diagram which are disputed in the current scientific literature, and in addition, to study the phase equilibria at 300°C. The melting behavior of the h-phase was confirmed to be peritectic. A metastable congruent solidification of the h-phase was observed from the microstructural examination of as-cast samples. The location of the liquidus curve in this region of the phase diagram was more accurately defined using DSC measurements taken at slow-heating rates (1°C min À1). The temperature stability of the f-phase was reevaluated and was found to lie in the range 373-597°C. The phase boundaries of the c¢ + e¢ two-phase field were experimentally defined. Difficulties in defining the c¢/d transition were addressed by a combined EDX/XRD investigation of more than ten samples that had been annealed in the temperature range of 500 to 750°C. The (c¢ + d) two-phase field was postulated from XRD studies of quenched samples. The temperature of the ordering reaction c M c¢ within the c(c¢) + b phase field was experimentally determined to be 779.6°C. All other parts of the Al-Cu phase diagram studied here were found to be in very good agreement with the most recent previous descriptions.

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Section: B Literature Reviewmentioning

confidence: 87%

Experimental Description of the Al-Cu Binary Phase Diagram

Zobač

Kroupa

Zemanová

et al. 2019

Metall Mater Trans A

101

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“…More importantly, very slow cooling experiments performed by van Sande et al. [30] show γ 1 and δ in equilibrium, too. These two experiments support the non-existence of a third equilibrium phase in the indicated region.…”

Section: Introduction and Literature Reviewmentioning

confidence: 93%

Re-investigation of phase equilibria in the system Al–Cu and structural analysis of the high-temperature phase η1-Al1−δCu

2011

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The phase equilibria and reaction temperatures in the system Al–Cu were re-investigated by a combination of optical microscopy, powder X-ray diffraction (XRD) at ambient and elevated temperature, differential thermal analysis (DTA) and scanning electron microscopy (SEM). A full description of the phase diagram is given. The phase equilibria and invariant reactions in the Cu-poor part of the phase diagram could be confirmed. The Cu-rich part shows some differences in phase equilibria and invariant reactions compared to the known phase diagram. A two phase field was found between the high temperature phase η1 and the low temperature phase η2 thus indicating a first order transition. In the ζ1/ζ2 region of the phase diagram recent findings on the thermal stability could be widely confirmed. Contrary to previous results, the two phase field between δ and γ1 is very narrow. The results of the current work indicate the absence of the high temperature β0 phase as well as the absence of a two phase field between γ1 and γ0 suggesting a higher order transition between γ1 and γ0. The structure of γ0 (I-43m, Cu5Zn8-type) was confirmed by means of high-temperature XRD. Powder XRD was also used to determine the structure of the high temperature phase η1-Al1−δCu. The phase is orthorhombic (space group Cmmm) and the lattice parameters are a = 4.1450(1) Å, b = 12.3004(4) Å and c = 8.720(1) Å; atomic coordinates are given.

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Organometallic Access to Intermetallic θ‐CuE₂ (E = Al, Ga) and Cu_1–xAl_x Phases

et al. 2008

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A reinvestigation of the γ phase in CuAl alloys: a new long-period superstructure

Cited by 13 publications

References 17 publications

Experimental Description of the Al-Cu Binary Phase Diagram

Experimental Description of the Al-Cu Binary Phase Diagram

Re-investigation of phase equilibria in the system Al–Cu and structural analysis of the high-temperature phase η1-Al1−δCu

Organometallic Access to Intermetallic θ‐CuE₂ (E = Al, Ga) and Cu_1–xAl_x Phases

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A reinvestigation of the γ phase in CuAl alloys: a new long-period superstructure

Cited by 13 publications

References 17 publications

Experimental Description of the Al-Cu Binary Phase Diagram

Experimental Description of the Al-Cu Binary Phase Diagram

Re-investigation of phase equilibria in the system Al–Cu and structural analysis of the high-temperature phase η1-Al1−δCu

Organometallic Access to Intermetallic θ‐CuE2 (E = Al, Ga) and Cu1–xAlx Phases

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Organometallic Access to Intermetallic θ‐CuE₂ (E = Al, Ga) and Cu_1–xAl_x Phases