Evolution of Phases in Selected Al–Co–Cu Complex Metallic Alloys Under Near-Equilibrium Conditions at 800–1150 ∘C
This work is focused on the experimental investigation of intermetallic phases in Al60Co29Cu11, Al63Co24Cu13, and Al67Co20Cu13 complex metallic alloys at near-equilibrium conditions. The alloys were long-term annealed at temperatures between 800 and 1150 ∘C and subsequently rapidly cooled to fix their high-temperature microstructures. Annealing temperatures were chosen with respect to the results of differential thermal analysis. Particular samples were studied by X-ray diffraction, scanning electron microscopy including energy dispersive X-ray spectroscopy and electron backscatter diffraction, and transmission electron microscopy. In the microstructures of particular samples, various combinations of D, B2, m, Al5Co2, and Θ-Al2Cu phases were identified depending on both bulk metal composition and thermal history.
KeywordsDifferential Thermal Analysis Peritectic Reaction Cooling Regime Solidification Peak Silica Capsule
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The authors wish to thank to the European Regional Development Fund (ERDF) for financial support of the project ITMS:26220120014 “Center for development and application of advanced diagnostic methods in processing of metallic and non-metallic materials” funded within the Research & Development Operational Programme, to the Slovak Academy of Sciences for the support in the frame of the “Center of Excellence for functional multiphase materials”, as well as to the Grant Agency VEGA for the financial support under the contracts 1/0143/12, 2/0111/11, and 1/0339/11, and to the Slovak Research and Development Agency for the financial support under the contract APVV-0076-11.
Grushko B, Velikanova T (2007) Formation of quasiperiodic and related periodic intermetallics in alloy systems of aluminum with transition metals. Calphad 31:217–232
Dubois JM (2008) An introduction to complex metallic alloys and to the CMA network of excellence. In: Belin-Ferré E (ed) Basics of thermodynamics and phase transitions in complex intermetallics. World Scientific, Singapore, pp 1–29
Urban K, Feuerbacher M (2004) Structurally complex alloy phases. J Non-Cryst Solids 334–335:143–150
Grushko B, Urban K (1991) Solidification of Al65
alloys. J Mater Res 6:2629–2636
Dong C, Dubois JM, De Boissieu M, Janot C (1991) Phase transformations and structure characteristics of the Al65
decagonal phase. J Phys Condens Matter 3:1665–1673
Grushko B (1993) Phase equilibrium and transformation of stable quasicrystals—decagonal Al–Cu–Co phase. Mater Trans, JIM 34:116–121
Grushko B (1993) A study of the Al–Cu–Co phase diagram and the solidification of alloys containing decagonal phase. Phase Transit 44:99–110
Zhang LM, Gille P (2004) Solidification study of Al–Co–Cu alloys using the Bridgman method. J Alloys Compd 370:198–205
Grushko B, Wittenberg R, Bickmann K, Freiburg C (1996) The constitution of aluminum–cobalt alloys between Al5
. J Alloys Compd 233:279–287
Goedecke T, Sommer F (1996) Solidification behavior of the Al2
Cu phase. Z Metkd 87:581–586
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