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Contribution of the silicon carbide particles to the process of forming the structure of magnesium cast composites
Published online by Cambridge University Press: 25 October 2002
Abstract
The work presents results of investigations and microstructural analyses for Mg-
SiCp cast composites. The metallographic examination shows that the distribution
of SiC particles is uniform. Quantitative image analysis of the microstructure shows
the magnesium grain size to be smaller and more uniform than in the base metal.
The studies at the level of the interfaces suggest that the bonding between the
matrix and the reinforcement is of the adhesive type. The presence of the Mg2Si
compound in the composites has also been revealed. Additionally, some
compounds seem to be present at the SiC/matrix interface. The performed
analyses have allowed to propose a model description of the process of the
formation of the Mg-SiC composite structure. Mechanical testing has shown that
composites have increased YoungÕs modulus and proof stress (R$_{{\rm p 0,2}}$) and
decreased impact strength.
- Type
- Research Article
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- Copyright
- © La Revue de Métallurgie, 2000
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