Abstract
The phase transformations in the Cu–9Al–10Mn–3Gd alloy were studied using differential scanning calorimetry, X-ray diffraction patterns, scanning electron microscopy, energy dispersion X-ray spectroscopy and magnetic moment change with applied field and temperature. The results showed that the effects produced by the Mn atoms are dominant on those attributed to the Gd atoms in the annealed Cu–9Al–10Mn–3Gd alloy. For quaternary alloy the results also indicated that the Gd stabilizes a fraction of the paramagnetic β3 phase at lower temperatures and suppresses its paramagnetic–ferromagnetic ordering; in addition, it increases the Curie temperature of the Cu–9Al–10Mn alloy.
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References
Murray JL. The aluminium-copper system. Inter Metal Rev. 1985;30:211–33.
Klinger L, Bréchet Y, Purdy G. On the kinetics of interface-diffusion-controlled peritectoid reactions. Acta Mater. 1998;46:2617–21.
Obradó E, Frontera C, Mañosa L, Planes A. Order-disorder transitions of Cu–Al–Mn shape-memory alloys. Phys Rev B. 1998;58:14245.
Silva RAG, Machado ES, Adorno AT, Magdalena AG, Carvalho TM. Completeness of β-phase decomposition reaction in Cu–Al–Ag alloys. J Therm Anal Calorim. 2012;109:927–31.
Kök M, Ata S, Yakıncı ZD, Aydogdu Y. Examination of phase changes in the CuAl high-temperature shape memory alloy with the addition of a third element. J Therm Anal Calorim. 2018. https://doi.org/10.1007/s10973-018-7176-0.
Lohan NM, Pricop B, Burlacu L, Bujoreanu L. Using DSC for the detection of diffusion-controlled phenomena in Cu-based shape memory alloys. J Therm Anal Calorim. 2018;131:215–24.
Velazquez D, Romero R. Spinodal decomposition and martensitic transformation in Cu–Al–Mn shape memory alloy. J Therm Anal Calorim. 2017;130:2007–13.
Bouchard M, Thomas G. Phase transitions and modulated structures in ordered (Cu–Mn)3Al alloys. Acta Metal. 1975;23:1485–500.
Sutou Y, Koeda N, Omori T, Kainuma R, Ishida K. Effects of ageing on bainitic and thermally induced martensitic transformations in ductile Cu–Al–Mn-based shape memory alloys. Acta Mater. 2009;57:5748–58.
Kainuma R, Takahashi S, Ishida K. Thermoelastic martensite and shape memory effect in ductile Cu–AI–Mn alloys. Metal Mater Trans A. 1996;27A:2187–95.
Mielczarek A, Kopp N, Riehemann W. Ageing effects after heat treatment in Cu–Al–Mn shape memory alloys. Mater Sci Eng A. 2009;182:521–2.
Sutou Y, Koeda N, Omori T, Kainuma R, Ishida K. Effects of aging on stress-induced martensitic transformation in ductile Cu–Al–Mn-based shape memory alloys. Acta Mater. 2009;57:5759–70.
Yiping L, Murthy A, Hadjipanayis GC. Giant magnetoresistance in Cu–Mn–Al. Phys Rev B. 1996;54:3033.
Mallik US, Sampath V. Influence of quaternary alloying additions on transformation temperatures and shape memory properties of Cu–Al–Mn shape memory alloy. J Alloys Compd. 2009;469:156–63.
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 Charact. 2013;75:194–9.
Chen J, Li Z, Zhao YY. A high-working-temperature CuAlMnZr shape memory alloy. J Alloys Compd. 2009;480:481–4.
Canbay CA, Genc ZK. Thermal and structural characterization of Cu–Al–Mn–X (Ti, Ni) shape memory alloys. Appl Phys A. 2014;115:371–7.
Canbay CA, Ozgen S. Thermal and microstructural investigation of Cu–Al–Mn–Mg shape memory alloys. Appl Phys A. 2014;117:767–71.
Benford SM, Brown GV. T–S diagram for gadolinium near the Curie temperature. J Appl Phys. 1981;52:2110–2.
Balzar D, Popa NC. Analyzing microstructure by Rietveld Refinement. Rigaku J. 2005;22:16–25.
Coelho AA, Evans J, Evans I, Kern A, Parsons S. The TOPAS symbolic computation system. Powder Diffr. 2011;26(S1):22–5.
Toby BH. R factors in Rietveld analysis: how good is good enough? Powder Diffr. 2006;21:67–70.
Santos CMA, Adorno AT, Paganotti A, Silva CCS, Oliveira AB, Silva RAG. Phase stability in the Cu–9wt%Al–10wt%Mn–3wt%Ag alloy. J Phys Chem Solids. 2017;104:145–51.
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 Compds. 1998;266:191–200.
Marcos JS, Fernández JR, Chevalier B, Bobet J-L, Etourneau J. Heat capacity and magnetocaloric effect in polycrystalline and amorphous GdMn2. J Magn Magn Mater. 2004;272–276:579–80.
Adorno AT, Guerreiro MR, Benedetti AV. Thermal behavior of CuAl alloys near the α-CuAl solubility limit. J Thermal Anal Calorim. 2001;65:221–9.
Adorno AT, Carvalho TM, Magdalena AG, dos Santos CMA, Silva RAG. Activation energy for the reverse eutectoid reaction in hypo-eutectoid Cu–Al alloys. Therm Acta. 2012;531:35–41.
Oliveira AB, Silva RAG. Thermomagnetic behavior of an as-quenched Cu–Al–Mn–Gd alloy. Mater Chem Phys. 2018;209:112–20.
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The authors thank to FAPESP (2015/18996-0) and CNPq (409714/2016-0) for financial support and LNNano for technical support during electron microscopy work (FEI-Inspect F50 FEG High-Resolution SEM).
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Brazolin, G.F., Silva, C.C.S., Silva, L.S. et al. Phase transformations in an annealed Cu–9Al–10Mn–3Gd alloy. J Therm Anal Calorim 134, 1405–1412 (2018). https://doi.org/10.1007/s10973-018-7586-z
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DOI: https://doi.org/10.1007/s10973-018-7586-z