Mn İçeriğinin Mn50-xNi41+xSn9 (x = 0, 2, 4) Manyetik Şekil Hafızalı Alaşımlarının Termal ve Manyetik Özelliklerine Etkisi

Abstract

Manyetik şekil hafızalı alaşımlarda (MŞHA) martensitik dönüşüm sıcaklıkları ve manyetik özellikler, alaşımı oluşturan metallerin kompozisyonuna güçlü bir şekilde bağlıdır. NiMn temelli MŞHA’ da yüksek Mn içeriğinin martensitik dönüşüm sıcaklıkları ve manyetizasyon değerleri üzerine etkisi önem taşımaktadır. Bu çalışmada, Mn_50-xNi_41+xSn₉  (x = 0, 2, 4) MŞHA’ da yüksek Mn içeriğinin termal ve manyetik özelliklere etkisi rapor edildi. Alaşımlar indüksiyon eritme/döküm metodu ile hazırlandı ve 72 saat 900 ^oC’ de argon atmosferinde ısıl işleme maruz kaldı ve daha sonra suda ani soğutuldu. Hazırlanan malzemelerin martensitik dönüşüm sıcaklıkları ve sıcaklığa bağlı manyetizasyon ölçümleri diferansiyel taramalı kalorimetresi (DSC) ve titreşimli örnek manyetometresi (VSM) ile yapıldı. Sonuç olarak DSC ölçümleri ve termomanyetizasyon (M-T) eğrilerinden, Mn içeriğinin alaşımların martensitik dönüşüm sıcaklıkları ve manyetizasyon değerlerini değiştirdiği tespit edildi. Mn miktarı artışına bağlı olarak martensitik dönüşüm sıcaklıklarında azalma ve bu sıcaklıklardaki manyetizasyon değerlerinde ani atlayışlar görüldü. Ayrıca manyetizasyon değerlerinde de Mn miktarı düştükçe azalma gözlendi.

Keywords

• MnNiSn
• Manyetik şekil hafızalı alaşımlar
• DSC
• VSM
• Termomanyetizasyon

The Effect of Mn Content on Thermal and Magnetic Properties of Mn50-xNi41+xSn9 (x = 0, 2, 4) Magnetic Shape Memory Alloys

Abstract

In magnetic shape memory alloys (MSMA), martensitic transformation temperatures and magnetic properties are strongly correlated with the composition of compounds. High Mn concentration in NiMn based MSMA has important effects on martensitic transformation temperatures and magnetization values. In this study, it was reported that the effect of Mn content on thermal and magnetic properties of Mn_50-xNi_41+xSn₉ (x = 0, 2, 4) MSMA. Considered alloys were prepared by an induction melting/casting method, and they were heat treated at 900 ^oC for 72 hours in argon atmosphere and then quenched into water. Prepared materials’ martensitic transformation temperatures and temperature-dependent magnetization measurements were done by differential scanning calorimetry (DSC) and vibrating sample magnetometer (VSM). As a result, it was determined that Mn content changed the martensitic transformation temperatures and magnetization values of alloys by DSC measurements and thermomagnetization (M-T) curves. Depending on the amount of Mn, it was seen that increment of martensitic transformation temperatures and sudden jump magnetization at these temperatures. Also, the magnetization values decreased as the Mn content decreased.    

Keywords

• MnNiSn
• Magnetic shape memory alloys
• DSC
• VSM
• Thermomagnetization

References

1. [1] A. Planes, M. Porta, T. Castan ve A. Saxena, "Magnetostructural Tweed in Ferromagnetic Heusler Shape Memory Alloys," Materials Science and Engineering, no. 916-918, pp. 438-440, 2006.
2. [2] Y. Ma ve J. Li, "A Constrained Theory on Actuation Strain in Ferromagnetic Shape Memory Alloys Induced by Domain Switching," Acta Materilia, cilt 55, pp. 3261-3269, 2007.
3. [3] M. Marioni, R. O'Handley, S. Allen, S. Hall, D. Paul, M. Richard, J. Feuchtwanger, P. B.W., C. J.M. ve R. Techapiesanchaoenkij, "The Ferromagnetic Shape Memory Effect in Ni-Mn-Ga," Journal of Magnetism and Magnetic Materials, Cilt %1 / %2290-291, pp. 35-41, 2004.
4. [4] G. Liu, Z. Liu, X. Dai, S. Yu, J. Chen ve G. Wu, "Investigation on Ferromagnetic Shape Memory Alloys," Science and Technology of Advanced Materials,, cilt 6, pp. 772-777, 2005.
5. [5] M. Sasmaz, V. Chernenko, E. Martinez, P. Lázpita ve J. Barandiarán, "Structure and magnetic-field induced effects in Mn-Ni(Fe)-Sn metamagnetic shape memory alloys," Materials Today: Proceedings, cilt 2S, p. S849 - S852, 2015.
6. [6] N. Bruno, D. Salas, S. Wang, I. V. Roshchin, R. Santamarta ve R. Arroyave, "On the microstructural origins of martensitic transformation arrest ina NiCoMnIn magnetic shape memory alloy," Acta Materialia, cilt 142, pp. 95-106, 2018.
7. [7] M. Sullivan, A. Shah ve H. Chopra, "Pathways of Structural and Magnetic Transition in Ferromagnetic Shape Memory Alloys," Physical Review B, cilt 70, pp. 1-8, 2003.
8. [8] D. Li, H. Garmestani, S. Yan, M. Elkawni, M. Bacaltchuk, H. Schneider-Muntau, J. Liu, S. Saha ve J. Barnard, "Effects of High Magnetic Field Annealing on Texture and Magnetic Properties of FePd," Journal of Magnetism and Magnetic Materials, cilt 281, pp. 272-275, 2004.

9. [9] K. Oikawa, T. Ota, Y. Imano, T. Omori, R. Kainuma ve K. Ishida, "Phase equilibria and phase transformation of Co−Ni−Ga ferromagnetic shape memory alloy system," Journal of Phase Equilibria and Diffusion, cilt 27, no. 1, pp. 75-82, 2006.
10. [10] R. Kainuma, Y. Imano, W. Ito, Y. Sutou, H. Morito, O. S., O. Kitakami, K. Oikawa ve A. Fujita, "Magnetic-Field-Induced Shape Recovery by Reverse Phase Transformation," Nature, cilt 439, pp. 957-960, 2006.
11. [11] R. Kainuma, Y. Imano, W. Ito, H. Morito, Y. Sutou, K. Oikawa, A. Fujita, K. Ishida, S. Okamoto, O. Kitakami ve T. Kanomata, "Metamagnetic shape memory effect in a Heusler-type Ni43Co7Mn39Sn11 polycrystalline alloy," Applied Physics Letters, cilt 88, no. 19, pp. 192513 - 192513-3, 2006.
12. [12] J. Monroe, J. Perez, C. Yegin, I. Karaman, A. Geltmacher, E. R.K. ve R. Kainuma, "Magnetic Response of Porous NiCoMnSn Metamagnetic Shape Memory Alloys Fabricated Using Solid-State Replication," Scripta Materialia, cilt 67, p. 116-119, 2012.
13. [13] Z. Wu, Z. Liu, H. Yang, Y. Liu, G. Wu ve R. Woodward, "Metallurgical Origin of The Effect of Fe Doping on The Martensitic and Magnetic Transformation Behaviors of Ni50Mn40-xSn10Fex Magnetic Shape Memory Alloys," Intermetallics, cilt 19, pp. 445-452, 2011.
14. [14] T. Chabri, A. Awasthi, K. Ghosh, A. Venimadhav ve T. Nath, "Temperature and magnetic field dependent martensite transformation in Al doped Ni-Mn-Sn disorder alloys and its effects on magnetoresistance and magnetocaloric effect near room temperature," Materials Research Express, cilt 5, no. 8, 2018.
15. [15] L. Ma, Q. S. Wang, Y. Li, M. C. Zhen, D. L. Hou, H. W. Wang, J. L. Chen ve H. Wu, "Martensitic and magnetic transformation in Mn50Ni50−xSnx ferromagnetic shape memory alloys," Journal of Applied Physics, cilt 112, no. 8, 2012.
16. [16] Z. Han, J. Chen, B. Qian, P. Zhang, X. Jiang, D. Wang ve Y. Du, "Phase Diagram and Magnetocaloric Effect in Mn2Ni1.64xCoxSn0.36 Alloys," Scripta Materialia, cilt 66, p. 121-124.
17. [17] P. Lazpita, M. Sasmaz, E. Cesari, J. Barandiaran ve J. Gutierrez, "Martensitic transformation and magnetic field induced effects in Ni42Co8Mn39Sn11 metamagnetic shape memory alloy," Acta Materialia, no. 109, pp. 170-176, 2016.
18. [18] A. Turabi, P. Lázpita, M. Sasmaz, H. Karaca ve V. Chernenko, "Magnetic and conventional shape memory behavior of Mn-Ni-Sn and Mn-Ni-Sn(Fe) alloys," Journal of Physics D: Applied Physics, no. 49, p. 205002, 2016.
19. [19] R. Khan, R. Ghomashchi, Z. Xie ve L. Chen, "Ferromagnetic Shape Memory Heusler Materials: Synthesis, Microstructure Characterization and Magnetostructural Properties," Materials, cilt 11, no. 6, p. 988, 2018.
20. [20] A. Sanchez, V. Recarte, J. Landazabal, G. Polo ve J. Velamazan, "Role of magnetism on the martensitic transformation," Acta Materialia, cilt 60, p. 459-468, 2012.
21. [21] K. Fukushima, K. Sano, T. Kanomata, H. Nishihara, Y. Furutani, T. Shishido, W. Ito, R. Umetsu, R. Kainuma, K. Oikawa ve K. Ishida, "Phase Diagram of Fe-Substituted Ni-Mn-Sn Shape Memory Alloys," Scripta Materialia, cilt 61, p. 813-816, 2009.
22. [22] H. Luo, G. Liu, Z. Feng, Y. Li, L. Ma, G. Wu, X. Zhu, C. Jiang ve H. Xu, "Effect of The Main-Group Elements on The Electronic Structures and Magnetic Properties of Heusler Alloys Mn2NiZ (Z = In, Sn, Sb)," Journal of Magnetism and Magnetic Materials, cilt 321, p. 4063-4066, 2009.
23. [23] H. Liu, C. Zhang, Z. Han, H. Xuan, D. Wang ve Y. Du, "The Effect of Co Doping on The Magnetic Entropy Changes in Ni44−xCoxMn45Sn11 Alloys," Journal of Alloys and Compounds, cilt 467, p. 27-30, 2009.
24. [24] C. L. Tan, Z. Feng, K. Zhang, M. Wu, X. H. Tian ve E. Guo, "Microstructure, martensitic transformation and mechanical properties of Ni−Mn−Sn alloys by substituting Fe for Ni," Transactions of Nonferrous Metals Society of China, cilt 27, no. 10, pp. 2234-2238, 2017.
25. [25] Z. Wu, Z. Liu, H. Yang, Y. Liu ve G. Wu, "Metamagnetic Phase Transformation in Mn50Ni37In10Co3 Polycrystalline Alloy," Applied Physics Letter, cilt 98, pp. 061904-1-11, 2011.