1. 4K-GM Cryocooler Performance and Thermal Conductivity of HoxEr1-xN
- Author
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Yasushi Fujimoto, Yusuke Hirayama, Toshio Irie, Takushi Izawa, Takanori Nakano, Shinji Masuyama, Takashi Nakagawa, Eiji Nakamura, and Takao A. Yamamoto
- Subjects
Materials science ,Thermal conductivity ,Specific heat ,Electrical resistivity and conductivity ,Alloy ,engineering ,Analytical chemistry ,Cryocooler ,engineering.material ,Nitride ,Thermal diffusivity ,Nitriding - Abstract
HoxEr1-xN (x=0.25, 0.5, 0.75) samples were synthesized by nitriding of HoxEr1-x alloy bars and their thermal conductivity κ were measured. The measured κ values were comparable to those of stainless steel and Er3Ni. Ho0.5Er0.5N showed the highest κ of the present three samples. The thermal diffusivity calculated from the κ and the specific heat indicates that Ho0.5Er0.5N is a very promising regenerator material for the cryocoolers. The electrical resistivity ρ was also measured as a function of temperature.
- Published
- 2013