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  Improvement of the thermo-mechanical properties of fine grain graphite by doping with different carbides

Garcia-Rosales, C., Ordas, N., Oyarzabal, E., Echeberria, J., Balden, M., Lindig, S., et al. (2002). Improvement of the thermo-mechanical properties of fine grain graphite by doping with different carbides. Journal of Nuclear Materials, 307, 1282-1288.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-41B2-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-41B3-0
Genre: Journal Article

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 Creators:
Garcia-Rosales, C.1, Author              
Ordas, N.2, Author
Oyarzabal, E.3, Author              
Echeberria, J.2, Author
Balden, M.3, Author              
Lindig, S.3, Author              
Behrisch, R.1, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Univ Navarra, Ctr Estudios & Invest Gipuzkoa, CEIT, E-20009 San Sebastian, Spain; Univ Navarra, Escuela Super Ingn, E-20009 San Sebastian, Spain, ou_persistent22              
3Material Research (MF), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856328              

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 Abstract: The possibilities for optimization of doped fine grain graphites with high thermal conductivity and high I thermal shock resistance are demonstrated at laboratory scale. A mixture of MCMB powder and different carbides (B4C, TiC, VC, ZrC and WC) was used as starting material. VC acts as catalyst of the graphitization at the lowest temperature, and ZrC is the most effective catalyst of all investigated carbides. A direct proportionality between the mean crystallite height, L-c, and the thermal conductivity at room temperature was found for all materials except for the B4C- and the ZrC-doped graphites. With increasing graphitization temperature the open porosity of all doped materials becomes gradually closed, suggesting the existence of a diffusion mechanism responsible for both the catalytic effect and the closing of the open porosity. The addition of carbides does not strongly influence the mechanical properties of pure graphite. A high ratio flexural strength to Young's modulus was achieved. (C) 2002 Elsevier Science B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2002
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 20480
ISI: 000180647300084
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Title: Journal of Nuclear Materials
  Alternative Title : J. Nucl. Mater.
Source Genre: Journal
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Pages: - Volume / Issue: 307 Sequence Number: - Start / End Page: 1282 - 1288 Identifier: ISSN: 0022-3115