Development of New Cryocooler Regenerator Materials--Ductile Intermetallic Compounds.

Gschneidner, K. A. ; Pecharsky, A. O. ; Pecharsky, V. K.

Technical Information Center Oak Ridge Tennessee

关键词: Intermetallic compounds;    Ductility;    Specific heat;    Heat capacity;    Regenerators;   

RP-ID  :  DE2004832896

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The volumetric heat capacities of a number of binary and ternary Er- and Tm-based intermetallic compounds, which exhibited substantial ductilities, were measured from (approx)3 to (approx)350 K. They have the RM stoichiometry (where R = Er or Tm, and M is a main group or transition metal) and crystallize in the CsCl-type structure. The heat capacities of the Tm-based compounds are in general larger than the corresponding Er-based materials. Many of them have heat capacities which are significantly larger than those of the low temperature (<15 K) prototype cryocooler regenerator materials HoCu(sub 2), Er(sub 3)Ni and ErNi. Utilization of the new materials as regenerators in the various cryocoolers should improve the performance of these refrigeration units for cooling below 15 K.