Abstract
The characteristics of the Cu–18.84 at.%Al–10.28 at.%Mn–1.57 at.%Ag alloy after slow cooling from high temperatures were studied using optical and scanning electron microscopies, microhardness measurements with temperature, differential scanning calorimetry, X-ray diffraction, magnetic moment changes with temperature and applied field. The results indicated the presence of a new transition associated with dissolution of the Ag-rich phase. It was also verified that the content of Al strongly interferes with the magnetization of the Cu–18.84 at.%Al–10.28 at.%Mn–1.57 at.%Ag alloy, since at lower Al concentration the relative fraction of the ferromagnetic L21-(Cu2AlMn) phase is decreased.
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References
Porter DA, Easterling KE. Phase transformations in metals and alloys. 2nd ed. Florida: CRC Press Taylor & Francis Group; 2004. p. 263.
Murray JL. The aluminium–copper system. Int Met Rev. 1985;30:211–33.
Magdalena AG, Adorno AT, Silva RAG, Carvalho TM. Effect of Ag concentration on the thermal behavior of the Cu–10 mass% Al and Cu–11 mass% Al alloys. J Thermal Anal Calorim. 2009;97:47–51.
Silva RAG, Machado ES, Adorno AT, Magdalena AG, Carvalho TM. Completeness of β-phase decomposition reaction in Cu–Al–Ag alloys. J Thermal Anal Calorim. 2012;109:927–31.
Canbay CA, Keskin A. Effects of vanadium and cadmium on transformation temperatures of Cu–Al–Mn shape memory alloy. J Therm Anal Calorim. 2014;118:1407–12.
Silva RAG, Paganotti A, Gama S, Adorno AT, Carvalho TM, Santos CMA. Investigation of thermal, mechanical and magnetic behaviors of the Cu–11 %Al alloy with Ag and Mn additions. Mater Char. 2013;75:194–9.
Benedetti AV, Nakazato RZ, Sumodjo PTA, Cabot PL, Centellas FA, Garrido JA. Potentiodynamic behaviour of Cu–A1–Ag alloys in NaOH: a comparative study related to the pure metals electrochemistry. Electrochim Acta. 1991;36:1409–21.
Adorno AT, Benedetti AV, Guerreiro MR. Isothermal aging kinetics in the Cu–19 at.%Al alloy. J Alloys Compd. 2001;315:150–7.
Adorno AT, Silva RAG. Isothermal decomposition kinetics in the Cu–9 %Al–4 %Ag. J Alloys Compd. 2004;375:128–33.
Bouchard M, Thomas G. Phase transitions and modulated structured in ordered (Cu-Mn)3Al alloys. Acta Metall. 1975;23:1485–500.
Canbay CA, Karagoz Z. The effect of quaternary element on the thermodynamic parameters and structure of CuAlMn shape memory alloys. Appl Phys A. doi:10.1007/s00339-013-7880-3.
Lu X, Chen F, Li W, Zheng Y. Effect of Ce addition on the microstructure and damping properties of Cu–Al–Mn shape memory alloys. J Alloys Compd. 2009;480:608–11.
Obradó E, Frontera C, Mañosa L, Planes A. Order-disorder transitions of Cu–Al–Mn shape-memory alloys. Phys Rev B. 1998;58:14245–55.
Kainuma R, Satoh N, Liu XJ, Ohnuma I, Ishida K. Phase equilibria and Heusler phase stability in the Cu-rich portion of the Cu–Al–Mn system. J Alloys Compd. 1998;266:191–200.
Yiping L, Murthy A, Hadjipanayis GC. Giant magnetoresistance in Cu–Mn–Al. Phys Rev B. 1996;54:3033–6.
Marcos J, Planes A, Mañosa L, Labarta A, Hattink BJ. Magnetoelasticity and magnetoresistance in Cu–Al–Mn shape-memory alloys. IEEE Trans Magn. 2001;37:2712–4.
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The authors thank FAPESP and CNPq for financial support and the LME/LNLS for technical support during electron microscopy work (JSM-5900LV).
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Silva, R.A.G., Paganotti, A., Adorno, A.T. et al. Characteristics of the Cu–18.84 at.%Al–10.28 at.%Mn–1.57 at.%Ag alloy after slow cooling from high temperatures. J Therm Anal Calorim 121, 1233–1238 (2015). https://doi.org/10.1007/s10973-015-4654-5
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DOI: https://doi.org/10.1007/s10973-015-4654-5