skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Near net shape processing of continuous lengths of superconducting wire

Abstract

A system and method for mechanically forming a ceramic superconductor product are disclosed. A system for making the ceramic superconductor includes a metallic channel portion having a cross section for receiving a ceramic superconductor powder, a roll to mechanically reduce the channel cross section and included superconductor powder and a cap portion welded to the channel portion using a localized high energy source. The assembled bar is then mechanically reduced to form a tape or wire end product. 9 figs.

Inventors:
; ; ; ; ;
Publication Date:
Research Org.:
Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
527743
Patent Number(s):
US 5,661,113/A/
Application Number:
PAN: 8-317,353
Assignee:
Univ. of Chicago, IL (United States) PTO; SCA: 360201; PA: EDB-97:125770; SN: 97001843777
DOE Contract Number:
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 26 Aug 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MATERIALS WORKING; SUPERCONDUCTING WIRES; CERAMICS; POWDERS; EQUIPMENT

Citation Formats

Danyluk, S., McNallan, M., Troendly, R., Poeppel, R., Goretta, K., and Lanagan, M.. Near net shape processing of continuous lengths of superconducting wire. United States: N. p., 1997. Web.
Danyluk, S., McNallan, M., Troendly, R., Poeppel, R., Goretta, K., & Lanagan, M.. Near net shape processing of continuous lengths of superconducting wire. United States.
Danyluk, S., McNallan, M., Troendly, R., Poeppel, R., Goretta, K., and Lanagan, M.. Tue . "Near net shape processing of continuous lengths of superconducting wire". United States. doi:.
@article{osti_527743,
title = {Near net shape processing of continuous lengths of superconducting wire},
author = {Danyluk, S. and McNallan, M. and Troendly, R. and Poeppel, R. and Goretta, K. and Lanagan, M.},
abstractNote = {A system and method for mechanically forming a ceramic superconductor product are disclosed. A system for making the ceramic superconductor includes a metallic channel portion having a cross section for receiving a ceramic superconductor powder, a roll to mechanically reduce the channel cross section and included superconductor powder and a cap portion welded to the channel portion using a localized high energy source. The assembled bar is then mechanically reduced to form a tape or wire end product. 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 26 00:00:00 EDT 1997},
month = {Tue Aug 26 00:00:00 EDT 1997}
}
  • A system and method for mechanically forming a ceramic superconductor product. A system for making the ceramic superconductor includes a metallic channel portion having a cross section for receiving a ceramic superconductor powder, a roll to mechanically reduce the channel cross section and included superconductor powder and a cap portion welded to the channel portion using a localized high energy source. The assembled bar is then mechanically reduced to form a tape or wire end product.
  • This patent describes a process for producing a metal shape. It comprises: plasma arc melting a metal selected from zirconium, hafnium and alloys thereof comprising at least about 90 w/o of these metals to form a liquid pool; pouring the metal form the pool into a mold to form a near net shape; and reducing the metal from its near net shape to a final size while maintaining the metal temperature below the alpha-beta transition temperature throughout the size reducing step.
  • A method for reaction forming refractory metal carbides. The method involves the fabrication of a glassy carbon preform by casting an organic, resin-based liquid mixture into a mold and subsequently heat treating it in two steps, which cures and pyrolizes the resin resulting in a porous carbon preform. By varying the amounts of the constituents in the organic, resin-based liquid mixture, control over the density of the carbon preform is obtained. Control of the density and microstructure of the carbon preform allows for determination of the microstructure and properties of the refractory metal carbide material produced. The glassy carbon preformmore » is placed on a bed of refractory metal or refractory metal--silicon alloy. The pieces are heated above the melting point of the metal or alloy. The molten metal wicks inside the porous carbon preform and reacts, forming the refractory metal carbide or refractory metal carbide plus a minor secondary phase.« less
  • We have developed a near-net-shape process for Ag-clad Bi-2212 superconductors as an alternative to the powder-in-tube process. This new process offers the advantages of nearly continuous processing, minimization of processing steps, reasonable ability to control the Bi-2212/Ag ratio, and early development of favorable texture of the Bi-2212 grains. Superconducting properties are discussed.
  • In this study, the authors present a new fabrication route based on a combination of Pseudo-HIP and SHS (self-propagating high-temperature synthesis) for producing TiAl intermetallic compounds. Near-net shape products with nearly full density were produced by the utilization of heat release and transient liquid phase involved in SHS under mechanical pressure by Pseudo-HIP. Microstructural control was conducted by subsequent heat treatment after the SHS. The fine grains obtained, consisting of equiaxed gamma and alpha2 by PseudoHIP-SHS, resulted in an improvement in the deformability of Ti-rich TiAl at high temperatures. Reactive bonding of TiAl can also be achieved by using themore » PseudoHIP-SHS process. Two elemental metal powder compacts set in Pseudo-HIP were bonded at the time of the reactive sintering of the compacts. Insert materials of elemental metal mixtures can be used for the bonding of TiAl compounds using Pseudo-HIP or uniaxial press.« less