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Physicochemical Aspects of the K2ZrF6 Process Allowing the Spontaneous Infiltration of SiC (or C) Preforms by Liquid Aluminium

  • S. Schamm
  • J. P. Rocher
  • R. Naslain

Abstract

K2ZrF6 enhances the wetting ability of SiC (or C) fibers by liquid aluminum alloys at low temperatures due to (i) a dissolution of the alumina film by fluoride species, (ii) a local evolution of heat related to exothermic reactions and (iii) the formation of a new liquid phase. The K2ZrF6 process results in a lowering of the UTS reinforcements due to an activation of the kinetics of formation of Al4C3 crystals at the fiber surface. Based on a theoretical modelization, it is established that the impregnation ability of SiC-SiC preforms by aluminum is significantly improved by a K2ZrF6, treatment applied to the preforms prior to casting.

Keywords

Alumina Film Liquid Aluminum Squeeze Casting Filament Surface Fiber Preform 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    - Rocher J.P., Quenisset J.M., Pailler R. and Naslain R., European Pat., 80901 204–4Google Scholar
  2. 2.
    - Rocher J.P., Macke T., Quenisset J.M., Naslain R. and Cotteret J., Proc. JNC-5 (C. Bathias and D. Menkes, eds.), pp. 343–360, Pluralis, Paris, 1986Google Scholar
  3. 3.
    -Köhler W., Aluminium, 51 (1975) 443–444Google Scholar
  4. 4.
    -Rocher J.P., Thesis # 888, Univ. Bordeaux, 1986Google Scholar
  5. 4.
    -Laurent V., Chatain D. and Eustathopoulos N., J. Mater. Sci, 22 (1987) 244–250CrossRefGoogle Scholar
  6. 6.
    - Schamm S., Rabardel L., Grannec J., Naslain R. and Bernard C., submitted to CalphadGoogle Scholar
  7. 7.
    -Blankenburgs G., J. Australian Inst, of Metals, 14/4 (1969) 236–241Google Scholar
  8. 8.
    - Quenisset J.M., Fedou R., Girot F.A. and Lepetitcorps Y., Proc. Symp. on Advances in Cast reinforced Met. Composites, 88th World Mat. Congr., Chicago, Sept 25–30, 1988, pp. 133–138Google Scholar

Copyright information

© Springer Science+Business Media B.V. 1989

Authors and Affiliations

  • S. Schamm
    • 1
  • J. P. Rocher
    • 2
  • R. Naslain
    • 3
  1. 1.Laboratoire de Chimie du Solide du CNRSTalenceFrance
  2. 2.SEPST Medard en JallesFrance
  3. 3.Laboratoire des Composites ThermostructurauxEuroparcPessacFrance

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