Fabrication of cryogenic refrigerator regenerator materials by s

Details Fabrication of cryogenic refrigerator regenerator materials by s Fabrication of cryogenic refrigerator regenerator materials by s

1991-03-11

1992-07-28

Wyszomerski, George

Specialized metallurgical processes, compositions for use therei

Processes

Producing solid particulate free metal directly from liquid...

75346, 264 25, B22F 914

Patent

active

051338009

ABSTRACT:
Materials for cryogenic refrigerator regenerators are formed by a high yield spark erosion cell. The materials are made of erbium or dysprosium and are spherical shaped. The spheres have a diameter range of 150 .mu.m to 400 .mu.m with a packing factor of at least 50%. The materials are made by disposing chunks of a starting material into a liquid dielectric in a spark chamber, agitating the chunks, impressing a spark voltage in order to cause melting of the chunks and formation of spherical particles, and collecting the particles at the bottom of the spark chamber. The particles may then be gathered, dried, and separated.

REFERENCES:
patent: 3355279 (1967-11-01), Ishibashi
patent: 4759905 (1988-07-01), Walter et al.
patent: 4849017 (1989-07-01), Sahashi et al.
patent: 4985072 (1991-01-01), Sahashi et al.
Walter, J. L., "On the Preparation of Powder by Spark Erosion", Technical Information Series, #88 CRD 202, Jul. 1988.

Affiliated with

Also associated with

Rating

Fabrication of cryogenic refrigerator regenerator materials by s does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fabrication of cryogenic refrigerator regenerator materials by s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fabrication of cryogenic refrigerator regenerator materials by s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1685107