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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Metal Matrix Composite processing by injection : numerical modelling at the fibre scale

Get access (open in a dialog) DOI: 10.1615/IHTC12.3510
6 pages

要約

Injection of liquid metal through a porous fibre preform is one of the metal matrix composite materials processing techniques. But as the pre-heating temperature is lower than the metal solidification one, local solidification occurs since the very beginning of injection, thus hindering infiltration process. Such temperature difference concerns as well the moulding apparatus pre-heating, thus increasing this phenomenon. When metallic alloy injection is considered, segregation mechanisms have also to be taken into account. All these phenomena make it advisable to develop a fibre-scale study prior to a macroscopic modelling.
As a preliminary numerical study, this work aims to validate the choice of a simplified local geometry. A bidimensionnal model, founded on the numerical solutions of both Heat and Navier-Stokes equations, and taking into account phase change for a simple metal, has been developed and applied to the simplified geometry. Comparison of the results with those of macroscopic model simulation show good agreement.