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.
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Schamm, S., Rocher, J.P., Naslain, R. (1989). Physicochemical Aspects of the K2ZrF6 Process Allowing the Spontaneous Infiltration of SiC (or C) Preforms by Liquid Aluminium. In: Bunsell, A.R., Lamicq, P., Massiah, A. (eds) Developments in the Science and Technology of Composite Materials. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1123-9_21
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DOI: https://doi.org/10.1007/978-94-009-1123-9_21
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6997-7
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