Skip to main content
SpringerLink
Log in

Microstructures and Magnetic Properties of Fe70−x Pd30Ni x High-Temperature Ferromagnetic Shape Memory Alloys

  • Original Paper
  • Published:
Journal of Superconductivity and Novel Magnetism Aims and scope Submit manuscript

Abstract

This research paper mainly presents an investigation of the microstructures and magnetic properties of bulk ferromagnetic shape memory (FSM) Fe70−x Pd30Ni x (Ni x = 4, 8 at.%) alloys, by transmission electron microscopy (TEM), a magnetostrictive-meter setup, and a superconducting quantum interference device (SQUID) magnetometer. The FSM alloys were homogenized through hot and cold strain forging (SF) to a ∼38 % reduction in thickness, solution-treated (ST) with annealing recrystallization at 1100 °C or 8 h, quenched in ice brine, and then aged at 500 °C for 100 h (5 HTA). The investigation of the microstructures and magnetic properties indicated that the higher Ni content (N x = 8 at.%) in the Fe62Pd30Ni8 alloy SF and ST reduced the saturation magnetostriction at RT. However, with higher Ni content in the Fe62Pd30Ni8 alloy, the decomposition of L10 + L1m twin phases into stoichiometric L10 + L1m + α bct structures was suppressed after the alloy was ST and aged at 5 HTA, as confirmed by TEM investigation. The result was that the FSM Fe62Pd30Ni8 alloy maintained a high saturation magnetostriction and magnetization after the alloy was ST and aged at 5 HTA. This magnetic property of the Fe62Pd30Ni8 FSM alloy makes it suitable for application in high-temperature (T < 500 °C) and high-frequency environments. However, low Ni content FSM Fe66Pd30Ni4 (N x = 4 at.%) alloy SF, ST, and aged at 5 HTA underwent decomposition of the L10 + L1m twin phases into the stoichiometric L10 + L1m + α bct structures, as confirmed by TEM, leading to a decrease of saturation magnetostriction and magnetization. This magnetic property of the Fe66Pd30Ni4 FSM alloy is not suitable for application in high-temperature (T < 500 °C) environments.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6

Similar content being viewed by others

References

  1. Kumar, P.K., Lagoudas, D.C.: Experimental and microstructural characterization of simultaneous creep, plasticity and phase transformation in Ti50Pd40Ni10 hightemperature shape memory alloy. Acta Materialia 58, 1618–1628 (2010)

    Article  Google Scholar 

  2. Xin, Y., Li, Y., Liu, Z.: Thermal stability of dual phase Ni58Mn25Ga17 high temperature shape memory alloy. Scripta Materialia 63, 35–38 (2010)

    Article  Google Scholar 

  3. Li, Y., Xin, Y., Chai, L., Mad, Y., Xu, H.: Microstructures and shape memory characteristics of dual phase Co–Ni–Ga high temperature shape memory alloys. Acta Materialia 58, 3655–3663 (2010)

    Article  Google Scholar 

  4. Lin, Y.C., Lin, C.F., Yang, J.B., Lee, H.T.: Microstructures and magnetostrictive strains of two phase Fe66Pd30Ni4 high temperature ferromagnetic shape memory alloys. J. Appl. Phys. 109(07A912), 1–3 (2011)

    Google Scholar 

  5. Lin, Y.C., Lee, H.T.: Grain size refinement and magnetostriction of ferromagnetic shape memory FePdRh alloys. J. Magn. Magn. Mater. 322(2), 197–207 (2010)

    Article  ADS  Google Scholar 

  6. Lin, Y.C., Lin, C.F.: Effects of Ni addition on the magnetostriction and microstructures of Fe70−x Pd30Ni x high temperature ferromagnetic shape memory alloys. J. Appl. Phys. 111(07A902), 1–3 (2012)

    Google Scholar 

  7. Ullakko, K., Huang, J.K., Kokorin, V.V., Handley, R.C.O.: Magnetically controlled shape memory effect in Ni 2MnGa intermetallics. Scripta Materialia 36, 1133–1138 (1997)

    Article  Google Scholar 

  8. Cui, J., Shield, T.W., James, R.D.: Phase transformation and magnetic anisotropy of an iron palladium ferromagnetic shape memory alloy. Acta Materialia 52, 35–47 (2004)

    Article  Google Scholar 

  9. Ullakko, K., Huang, J.K., Kantner, C., Handley, R.C.O., Kokorin, V.V.: Large magnetic field induced strains in Ni2MnGa single crystals. Appl. Phys. Lett. 69, 1966–1968 (1996)

    Article  ADS  Google Scholar 

  10. Cullity, B.D.: Introduction to Magnetic Materials. In: Cohen, M. (ed.) pp. 207247, and pp. 357382. AddisonWesley, Reading (1972)

  11. Lin, C.F., Yang, J.B.: Effects of Ni addition on the microstructures and magnetic properties of Fe70−x Pd30Ni x hightemperature ferromagnetic shape memory alloys. J. Magn. 17(2), 86–95 (2012)

    Article  Google Scholar 

Download references

Acknowledgments

The author would like to express his sincere appreciation to the Ministry of Science and Technology of the Republic of China for supporting this study (under Grant-in-Aid for MOST 101-2221-E-151-008). The author also wishes to thank Hsueh-Yen Yao of the National Cheng Kung University for his help in the TEM operation.

Author information

Authors and Affiliations

  1. Department of Mold and Die Engineering, National Kaohsiung University of Applied Sciences, 807-78, Kaohsiung, Taiwan

    Yin-Chih Lin

Authors
  1. Yin-Chih Lin
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Yin-Chih Lin.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Lin, YC. Microstructures and Magnetic Properties of Fe70−x Pd30Ni x High-Temperature Ferromagnetic Shape Memory Alloys. J Supercond Nov Magn 28, 863–868 (2015). https://doi.org/10.1007/s10948-014-2690-1

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10948-014-2690-1

Keywords

Search

Navigation