Microstructural study of aluminium-matrix composites reinforced with SiC

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4 Citations (Scopus)


Rheocasting, as a semi-solid process, allows the production of aluminium matrix composites at relatively low temperatures (ca. 580°C), thus favouring a reduced reactivity at the reinforcement-metal matrix interface. When one considers the possibility of further processing (such as any treatment involving remelting, even if partial) of the material, this trait allows a more rigorous control of the interfaces. Composite samples have been produced using as matrix an Al-7Si-0.3Mg alloy reinforced with SiCp (granulometry: 120 μm; Vr = 0.30). These were rheocast at 583°C, followed by compression and subsequent water-quenching. A structural characterisation (optical microscopy and XRD) of the as-received matrix material, as well as of the reinforced and non-reinforced rheocast material was performed. The phases identification will provide a basis for the understanding of the further processing where the rheocast material will be used as a precursor to produce functionally graded metal-matrix composites by centrifugal casting.

Original languageEnglish
Pages (from-to)226-230
Number of pages5
JournalKey Engineering Materials
Publication statusPublished - 2 Dec 2002
Event1st International Materials Symposium (Materials 2001) - Universidade de Coimbra, Coimbra, Portugal
Duration: 9 Apr 200111 Apr 2001


  • Metal-Matrix Composites
  • Microstructures
  • Rheocasting


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