Paper Title:
Thermal Expansion of Advanced Materials for High Temperature Fusion Application
  Abstract

In this paper, two different technologies for preparation of the composite are presented: vacuum diffusion bonding and gas pressure infiltration. Samples contained different volume fractions of tungsten fibres (10%, 50% and 78%) that were arranged in unidirectional, cross-ply and circular architecture. The coefficient of thermal expansion (CTE) of Cu/W MMC samples was measured in the longitudinal and transverse direction to the fibre orientation and it strongly depended on arrangement of reinforcing phase and direction of measurement. For the unidirectional material the CTE was 4 - 6 ppm.K-1 and 11-12 ppm.K-1 in directions parallel and transverse to the fibre orientation, respectively. Samples in a shape of a ring contained reinforcement that was wounded around the sample centre (circumferential winding) or was cut-out from the Cu/W MMC plate. In the second case, the reinforced fibres had the woven arrangement. The CTE of ring measured in radial direction showed values from 5 ppm.K-1 to 20 ppm.K-1 for composites containing 72 and 10 vol. % of W-fibres, respectively.

  Info
Periodical
Defect and Diffusion Forum (Volumes 297-301)
Edited by
Andreas Öchsner, Graeme E. Murch, Ali Shokuhfar and João M.P.Q. Delgado
Pages
844-848
DOI
10.4028/www.scientific.net/DDF.297-301.844
Citation
T. Dvorák, Š. Kavecký, P. Štefánik, "Thermal Expansion of Advanced Materials for High Temperature Fusion Application", Defect and Diffusion Forum, Vols. 297-301, pp. 844-848, 2010
Online since
April 2010
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Price
$32.00
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