Simple die pressing for making artificial holes in single-grain Gd 1.5Ba 2Cu 3O 7-y superconductors

K. M. Kim, S. D. Park, B. H. Jun, Tae Kuk Ko, C. J. Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The presence of artificial holes in single-grain REBa 2Cu 3O 7-y (RE123, RE: rare-earth elements) bulk superconductors can facilitate oxygen diffusion into superconducting grains through the increased surface area. In addition to the enhancement of oxygen diffusion, the mechanical properties and thermal conductivity of bulk superconductors can be improved by filling holes with a metallic conductive phase. This study presents a new and simple hole-making process for single-grain RE123 bulk superconductors. Artificial holes 3 or 5mm in diameter were made for Gd 1.5Ba 2Cu 3O 7y (Gd1.5) powder compacts prior to the sintering/melt growth process using specially designed pressing dies. The die pressing neither induced cracking in powder compacts nor influenced thermal procedures for the Gd123 growth. Single-grain Gd1.5 bulk superconductors with holes were successfully fabricated by a top-seeded melt growth (TSMG) process using Gd1.5 powder compacts with holes. The die pressing was proven as a time-saving process in comparison with the conventional method which makes holes in sintered or melt-processed hard bodies by mechanical drilling. The detailed fabrication process of single-grain Gd1.5 bulk superconductor with holes, magnetic levitation forces, and magnetic flux density, estimated for the single-grain Gd123 bulk superconductors with holes, are reported.

Original languageEnglish
Article number105016
JournalSuperconductor Science and Technology
Volume25
Issue number10
DOIs
Publication statusPublished - 2012 Oct 1

Fingerprint

pressing
Superconducting materials
Powders
Oxygen
Magnetic levitation
Magnetic flux
Rare earth elements
Thermal conductivity
Drilling
Sintering
levitation
oxygen
drilling
Fabrication
Mechanical properties
magnetic flux
sintering
thermal conductivity
rare earth elements
flux density

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

@article{972064ef962c49b8be2e1bf615de4f0e,
title = "Simple die pressing for making artificial holes in single-grain Gd 1.5Ba 2Cu 3O 7-y superconductors",
abstract = "The presence of artificial holes in single-grain REBa 2Cu 3O 7-y (RE123, RE: rare-earth elements) bulk superconductors can facilitate oxygen diffusion into superconducting grains through the increased surface area. In addition to the enhancement of oxygen diffusion, the mechanical properties and thermal conductivity of bulk superconductors can be improved by filling holes with a metallic conductive phase. This study presents a new and simple hole-making process for single-grain RE123 bulk superconductors. Artificial holes 3 or 5mm in diameter were made for Gd 1.5Ba 2Cu 3O 7y (Gd1.5) powder compacts prior to the sintering/melt growth process using specially designed pressing dies. The die pressing neither induced cracking in powder compacts nor influenced thermal procedures for the Gd123 growth. Single-grain Gd1.5 bulk superconductors with holes were successfully fabricated by a top-seeded melt growth (TSMG) process using Gd1.5 powder compacts with holes. The die pressing was proven as a time-saving process in comparison with the conventional method which makes holes in sintered or melt-processed hard bodies by mechanical drilling. The detailed fabrication process of single-grain Gd1.5 bulk superconductor with holes, magnetic levitation forces, and magnetic flux density, estimated for the single-grain Gd123 bulk superconductors with holes, are reported.",
author = "Kim, {K. M.} and Park, {S. D.} and Jun, {B. H.} and Ko, {Tae Kuk} and Kim, {C. J.}",
year = "2012",
month = "10",
day = "1",
doi = "10.1088/0953-2048/25/10/105016",
language = "English",
volume = "25",
journal = "Superconductor Science and Technology",
issn = "0953-2048",
publisher = "IOP Publishing Ltd.",
number = "10",

}

Simple die pressing for making artificial holes in single-grain Gd 1.5Ba 2Cu 3O 7-y superconductors. / Kim, K. M.; Park, S. D.; Jun, B. H.; Ko, Tae Kuk; Kim, C. J.

In: Superconductor Science and Technology, Vol. 25, No. 10, 105016, 01.10.2012.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Simple die pressing for making artificial holes in single-grain Gd 1.5Ba 2Cu 3O 7-y superconductors

AU - Kim, K. M.

AU - Park, S. D.

AU - Jun, B. H.

AU - Ko, Tae Kuk

AU - Kim, C. J.

PY - 2012/10/1

Y1 - 2012/10/1

N2 - The presence of artificial holes in single-grain REBa 2Cu 3O 7-y (RE123, RE: rare-earth elements) bulk superconductors can facilitate oxygen diffusion into superconducting grains through the increased surface area. In addition to the enhancement of oxygen diffusion, the mechanical properties and thermal conductivity of bulk superconductors can be improved by filling holes with a metallic conductive phase. This study presents a new and simple hole-making process for single-grain RE123 bulk superconductors. Artificial holes 3 or 5mm in diameter were made for Gd 1.5Ba 2Cu 3O 7y (Gd1.5) powder compacts prior to the sintering/melt growth process using specially designed pressing dies. The die pressing neither induced cracking in powder compacts nor influenced thermal procedures for the Gd123 growth. Single-grain Gd1.5 bulk superconductors with holes were successfully fabricated by a top-seeded melt growth (TSMG) process using Gd1.5 powder compacts with holes. The die pressing was proven as a time-saving process in comparison with the conventional method which makes holes in sintered or melt-processed hard bodies by mechanical drilling. The detailed fabrication process of single-grain Gd1.5 bulk superconductor with holes, magnetic levitation forces, and magnetic flux density, estimated for the single-grain Gd123 bulk superconductors with holes, are reported.

AB - The presence of artificial holes in single-grain REBa 2Cu 3O 7-y (RE123, RE: rare-earth elements) bulk superconductors can facilitate oxygen diffusion into superconducting grains through the increased surface area. In addition to the enhancement of oxygen diffusion, the mechanical properties and thermal conductivity of bulk superconductors can be improved by filling holes with a metallic conductive phase. This study presents a new and simple hole-making process for single-grain RE123 bulk superconductors. Artificial holes 3 or 5mm in diameter were made for Gd 1.5Ba 2Cu 3O 7y (Gd1.5) powder compacts prior to the sintering/melt growth process using specially designed pressing dies. The die pressing neither induced cracking in powder compacts nor influenced thermal procedures for the Gd123 growth. Single-grain Gd1.5 bulk superconductors with holes were successfully fabricated by a top-seeded melt growth (TSMG) process using Gd1.5 powder compacts with holes. The die pressing was proven as a time-saving process in comparison with the conventional method which makes holes in sintered or melt-processed hard bodies by mechanical drilling. The detailed fabrication process of single-grain Gd1.5 bulk superconductor with holes, magnetic levitation forces, and magnetic flux density, estimated for the single-grain Gd123 bulk superconductors with holes, are reported.

UR - http://www.scopus.com/inward/record.url?scp=84866328082&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84866328082&partnerID=8YFLogxK

U2 - 10.1088/0953-2048/25/10/105016

DO - 10.1088/0953-2048/25/10/105016

M3 - Article

VL - 25

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

SN - 0953-2048

IS - 10

M1 - 105016

ER -