Metallurgy, Vol. 42 No. 3, 2003.
Original scientific paper
An Analysis of Geometric Conditions in the Process of Infiltrating the Reinforcement of Cast Metal Matrix Composites
J. Grabian
Abstract
An analysis was made in the first stage of producing casts from saturated metal composites, which consist in the penetration of liquid metal into the depths of the reinforcement. For most of the materials applied both the matrix and the reinforcements of the composites this process is difficult because of poor wettability of the ceramic reinforcement by liquid metal. Pressure is the enforcing factor. It is easy to select this pressure when the shape and dimensions of the space between reinforcement fibres can be geometrically described; this occurs when the reinforcement fibres are ordered. For composites of disordered fibres it is practically impossible to describe the space geometry between fibres. It has been proved that the stage of filling with metal the closed capillary spaces formed by fibres touching one another is decisive in the saturation process. It has also been proved that the process of saturating the reinforcement with disordered fibres should be examined on a macroscopic scale.
Keywords
Hrčak ID:
128450
URI
Publication date:
1.7.2003.
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