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Title: Development of New Cryocooler Regenerator Materials-Ductile Intermetallic Compounds

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.
Authors:
; ;
Publication Date:
OSTI Identifier:
832896
Report Number(s):
IS-M 931
TRN: US0406412
DOE Contract Number:
W-7405-Eng-82
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 30 Sep 2004
Research Org:
Ames Laboratory, Ames, IA (US)
Sponsoring Org:
USDOE Office of Science (SC) (US)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; INTERMETALLIC COMPOUNDS; PERFORMANCE; REFRIGERATION; REGENERATORS; STOICHIOMETRY; ERBIUM COMPOUNDS; THULIUM COMPOUNDS; SPECIFIC HEAT; DUCTILITY; CRYSTAL STRUCTURE; CRYOGENICS