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Properties of gadolimium wire for magnetic refrigeration.

Number: pap. 177

Author(s) : NOMURA R., KIZAKI T., UENO K., et al.

Summary

In an active magnetic regenerator (AMR) cycle, the shape of the magnetocaloric material (MCM) has a large influence on the pressure losses of the refrigerant fluid. The results of a simulation suggest that a wire-shaped MCM lined up in the regenerator lead to more reductions in the pressure losses compared to packed particles of MCM [1]. However, no experimental study verified the simulation results. We have developed a gadolinium (Gd) wire with a diameter of 0.25 mm to increase the power of an AMR based on the simulation results. This paper reports mechanic and magnetic properties of the wire. The tensile strength of the wire was about 400 MPa and the elongation was about 3%. These properties were almost the same as those of a copper wire. This suggests that Gd wires can easily be handled like common metal wires. For example, this wire can be lined up side by side in the regenerator. The maximum magnetic entropy change, ?Sm, of the wire was about 2.6 J/Kg*K. This value was lower than that of the particles (-2.8 J/Kg*K). The Curie temperature, TC, of the wire was slightly lower than that of the particles. More detailed data will be reported in the poster session.

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Details

  • Original title: Properties of gadolimium wire for magnetic refrigeration.
  • Record ID : 30019351
  • Languages: English
  • Source: 7th International Conference on Magnetic Refrigeration at Room Temperature (Thermag VII). Proceedings: Turin, Italy, September 11-14, 2016.
  • Publication date: 2016/09/11
  • DOI: http://dx.doi.org/10.18462/iir.thermag.2016.0177

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