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


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.


Alumina Film Liquid Aluminum Squeeze Casting Filament Surface Fiber Preform 
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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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