Abstract
Neodymium is a regenerator material used in Gifford-McMahon cryocoolers at temperatures <10 K due to its high heat capacity resulting from the magnetic order transformation at the Curie temperature. Typically the Nd is used as a powder or small spheres, but it is preferable to use alternative configurations that allow more efficient gas flow and heat transfer. However Nd is difficult to fabricate into wire or strips because it work hardens rapidly and also has a high affinity for oxygen. By cladding the Nd with niobium, it is possible to protect the Nd from oxidation and allow drawing and rolling to small dimensions. This work reports on the development of a process to form Nb clad Nd into fine wire, rolling the fine wire to strip, and the forming of small ridges in the strip. The strip is then wound into a pancake coil, and stacked for use in a regenerator.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
M. Heiberger, A. Langhorn, T.W. Hurn, D.G. Morris, J.D. Walters, L.F. Aprigliano, D. Waltman, and G.F. Green, A lightweight rugged conduction-cooled NbTi superconducting magnet for US Navy minesweeper applications, in: “Adv.in Cryo Eng.” Vol. 41b, Pg. 1087–1095
J.N. Chafe, G.F. Green, and J.W. Stevens, Geometric scaling of a 4.2K Gifford-McMahon refrigerator, in: “Cryocoolers 9,” R.G. Ross, Jr., ed., Plenum Press, New York (1997), p. 627–636.
J.N. Chafe, G.F. Green, and J.B. Hendricks, A neodymium plate regenerator for low temperature Gifford-McMahon cycle refrigerators, in: “Cryocoolers 9,” R.G. Ross, Jr., ed., Plenum Press, New York (1997), p. 653–662.
V.K. Pecharsky, K.A. Gschneidner, Jr., R.W. McCallum, and K.W. Dennis, Influence of alloying on the behavior and properties of Er3Ni, in: “Cryocoolers 9,” R.G. Ross, Jr., ed., Plenum Press, New York (1997), p. 663–668.
T. Wong and J. Seuntjens, “Development of rare earth regenerator materials in fine wire form, in: “Adv. in Cryo. Eng.,” Vol. 42a, Pg. 439–444.
J. Kajuch and T. Felmley, Rapid Response for Fabrication Issues of Neodymium Ribbon Regenerators for Use in Cryogenic Refrigerators, Final Report, NCEMT TR No. 97–110, Concurrent Technologies Corporation, Johnstown, PA, July, 1997.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1998 Springer Science+Business Media New York
About this chapter
Cite this chapter
Wong, T., Rudziak, M.K. (1998). Niobium Clad Neodymium in Wire and Strip Form for Use as a Regenerator. In: Kittel, P. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 43. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9047-4_198
Download citation
DOI: https://doi.org/10.1007/978-1-4757-9047-4_198
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4757-9049-8
Online ISBN: 978-1-4757-9047-4
eBook Packages: Springer Book Archive