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Copper and CuNi alloys substrates for HTS coated conductor applications protected from oxidation

Journal Article:

Abstract

Copper is an interesting substrate for HTS coated conductors for its low cost compared to other metallic substrates, and for its low resistivity. Nevertheless, mechanical properties and resistance to oxidation should be improved in order to use it as substrate for YBCO deposition by non-vacuum techniques. Therefore, different cube textured CuNi tapes were prepared by RABIT as possible substrates for deposition of high critical current density YBCO films. Under the optimised conditions of deformation and annealing, all the studied CuNi alloys (2%, 5%, and 10% Ni) presented (100) left angle 001 right angle cube texture which is compatible for YBCO deposition. Textured CuNi alloys present higher tensile strength than pure copper. Oxidation resistance of CuNi tapes under different oxygen atmospheres was also studied by thermogravimetric analysis and compared to pure copper tapes. Although the presence of nickel improves mechanical properties of annealed copper, it does not improve its oxidation resistance. However, when a chromium buffer layer is electrodeposited on the tape, oxygen diffusion is slowed down. Chromium is, therefore, useful for protecting copper and CuNi alloys from oxidation although its recrystallisation texture, (110), is not suitable for coated conductors. (orig.)
Authors:
Segarra, M; Diaz, J; Xuriguera, H; Chimenos, J M; Espiell, F; [1]  Miralles, L; [2]  Pinol, S [3] 
  1. Dept. of Chemical Engineering and Metallurgy, Univ. of Barcelona, Barcelona (Spain)
  2. Lab. d'Investigacio en Formacions Geologiques. Dept. of Petrology, Geochemistry and Geological Prospecting, Univ. of Barcelona, Barcelona (Spain)
  3. Inst. de Ciencia de Materials de Barcelona, Bellaterra (Spain)
Publication Date:
Jul 01, 2003
Product Type:
Journal Article
Resource Relation:
Journal Name: Materials Science Forum; Journal Volume: 426-432; Journal Issue: pt.4; Conference: Thermec 2003: International conference on processing and manufacturing of advanced materials - Processing, fabrication, properties, applications, Madrid (Spain), 7-11 Jul 2003; Other Information: PBD: 2003
Subject:
36 MATERIALS SCIENCE; ANNEALING; BINARY ALLOY SYSTEMS; CHROMIUM; COPPER; COPPER ALLOYS; CRITICAL CURRENT; DIFFUSION; FILMS; HIGH-TC SUPERCONDUCTORS; NICKEL ALLOYS; OXIDATION; PROTECTIVE COATINGS; SUBSTRATES; SURFACE COATING; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0400-1000 K; TEXTURE; YIELD STRENGTH
OSTI ID:
20370993
Country of Origin:
Switzerland
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0255-5476; MSFOEP; TRN: CH03F8428
Submitting Site:
CHN
Size:
page(s) 3511-3516
Announcement Date:

Journal Article:

Citation Formats

Segarra, M, Diaz, J, Xuriguera, H, Chimenos, J M, Espiell, F, Miralles, L, and Pinol, S. Copper and CuNi alloys substrates for HTS coated conductor applications protected from oxidation. Switzerland: N. p., 2003. Web.
Segarra, M, Diaz, J, Xuriguera, H, Chimenos, J M, Espiell, F, Miralles, L, & Pinol, S. Copper and CuNi alloys substrates for HTS coated conductor applications protected from oxidation. Switzerland.
Segarra, M, Diaz, J, Xuriguera, H, Chimenos, J M, Espiell, F, Miralles, L, and Pinol, S. 2003. "Copper and CuNi alloys substrates for HTS coated conductor applications protected from oxidation." Switzerland.
@misc{etde_20370993,
title = {Copper and CuNi alloys substrates for HTS coated conductor applications protected from oxidation}
author = {Segarra, M, Diaz, J, Xuriguera, H, Chimenos, J M, Espiell, F, Miralles, L, and Pinol, S}
abstractNote = {Copper is an interesting substrate for HTS coated conductors for its low cost compared to other metallic substrates, and for its low resistivity. Nevertheless, mechanical properties and resistance to oxidation should be improved in order to use it as substrate for YBCO deposition by non-vacuum techniques. Therefore, different cube textured CuNi tapes were prepared by RABIT as possible substrates for deposition of high critical current density YBCO films. Under the optimised conditions of deformation and annealing, all the studied CuNi alloys (2%, 5%, and 10% Ni) presented (100) left angle 001 right angle cube texture which is compatible for YBCO deposition. Textured CuNi alloys present higher tensile strength than pure copper. Oxidation resistance of CuNi tapes under different oxygen atmospheres was also studied by thermogravimetric analysis and compared to pure copper tapes. Although the presence of nickel improves mechanical properties of annealed copper, it does not improve its oxidation resistance. However, when a chromium buffer layer is electrodeposited on the tape, oxygen diffusion is slowed down. Chromium is, therefore, useful for protecting copper and CuNi alloys from oxidation although its recrystallisation texture, (110), is not suitable for coated conductors. (orig.)}
journal = {Materials Science Forum}
issue = {pt.4}
volume = {426-432}
journal type = {AC}
place = {Switzerland}
year = {2003}
month = {Jul}
}