Perforated plates for cryogenic regenerators and method of fabrication
Abstract
Perforated plates (10) having very small holes (14) with a uniform diameter throughout the plate thickness are prepared by a "wire drawing" process in which a billet of sacrificial metal is disposed in an extrusion can of the plate metal, and the can is extruded and restacked repeatedly, converting the billet to a wire of the desired hole diameter. At final size, the rod is then sliced into wafers, and the wires are removed by selective etching. This process is useful for plate metals of interest for high performance regenerator applications, in particular, copper, niobium, molybdenum, erbium, and other rare earth metals. Er.sub.3 Ni, which has uniquely favorable thermophysical properties for such applications, may be incorporated in regions of the plates by providing extrusion cans (20) containing erbium and nickel metals in a stacked array (53) with extrusion cans of the plate metal, which may be copper. The array is heated to convert the erbium and nickel metals to Er.sub.3 Ni. Perforated plates having two sizes of perforations (38, 42), one of which is small enough for storage of helium, are also disclosed.
- Inventors:
-
- Huntsville, AL
- Issue Date:
- Research Org.:
- Alabama Cryogenic Engineering, Inc., Huntsville, AL
- OSTI Identifier:
- 869213
- Patent Number(s):
- 5298337
- Assignee:
- Alabama Cryogenic Engineering, Inc. (Huntsville, AL)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL B21C - MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING
F - MECHANICAL ENGINEERING F25 - REFRIGERATION OR COOLING F25B - REFRIGERATION MACHINES, PLANTS OR SYSTEMS
- DOE Contract Number:
- FG05-90ER81018
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- perforated; plates; cryogenic; regenerators; method; fabrication; 10; holes; 14; uniform; diameter; throughout; plate; thickness; prepared; wire; drawing; process; billet; sacrificial; metal; disposed; extrusion; extruded; restacked; repeatedly; converting; desired; final; size; rod; sliced; wafers; wires; removed; selective; etching; useful; metals; performance; regenerator; applications; particular; copper; niobium; molybdenum; erbium; rare; earth; uniquely; favorable; thermophysical; properties; incorporated; regions; providing; cans; 20; containing; nickel; stacked; array; 53; heated; convert; sizes; perforations; 38; 42; storage; helium; disclosed; selective etching; sacrificial metal; physical properties; rare earth; earth metal; earth metals; uniform diameter; nickel metal; stacked array; perforated plates; selective etch; final size; perforated plate; /428/29/
Citation Formats
Hendricks, John B. Perforated plates for cryogenic regenerators and method of fabrication. United States: N. p., 1994.
Web.
Hendricks, John B. Perforated plates for cryogenic regenerators and method of fabrication. United States.
Hendricks, John B. Sat .
"Perforated plates for cryogenic regenerators and method of fabrication". United States. https://www.osti.gov/servlets/purl/869213.
@article{osti_869213,
title = {Perforated plates for cryogenic regenerators and method of fabrication},
author = {Hendricks, John B},
abstractNote = {Perforated plates (10) having very small holes (14) with a uniform diameter throughout the plate thickness are prepared by a "wire drawing" process in which a billet of sacrificial metal is disposed in an extrusion can of the plate metal, and the can is extruded and restacked repeatedly, converting the billet to a wire of the desired hole diameter. At final size, the rod is then sliced into wafers, and the wires are removed by selective etching. This process is useful for plate metals of interest for high performance regenerator applications, in particular, copper, niobium, molybdenum, erbium, and other rare earth metals. Er.sub.3 Ni, which has uniquely favorable thermophysical properties for such applications, may be incorporated in regions of the plates by providing extrusion cans (20) containing erbium and nickel metals in a stacked array (53) with extrusion cans of the plate metal, which may be copper. The array is heated to convert the erbium and nickel metals to Er.sub.3 Ni. Perforated plates having two sizes of perforations (38, 42), one of which is small enough for storage of helium, are also disclosed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1994},
month = {Sat Jan 01 00:00:00 EST 1994}
}