Processing of Metal Matrix Composites (MMCs)

Solid state Processing Liquid state Processing Deposition In-situ Processing

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Deposition methods of processing of MMCs

Electroless deposition and Electrodeposition Physical vapour deposition Chemical vapour deposition Spray deposition (flame or plasma)

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Dispersed (reinforcing) phase is formed in the matrix as a result of precipitation from the melt during its cooling and solidification.

In-situ processing of MMCs

Dispersed phases of in situ fabricated MMCs may consist of intermetallic compounds, carbides, borides, oxides, or one of eutectic ingredients.

Dmitri Kopeliovich

http://www.substech.com/dokuwiki/doku.php?id=metal_matrix_composites 3

4 F.L. Matthews and R.D. Rawlings, Composite Materials: Engineering and Science, Woodhead Publishing Limited, 2008.

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Fracture and Failure in FRCs

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Fracture and failure in MMCs

Karl Ulrich Kainer, Basics of Metal Matrix Composites, Wiley-VCH Verlag GmbH&Co, Weinheim, 2006.

7 Al-SiC (good adhesion) Al-C (poor adhesion)

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Higher specific modulus and strength Better properties at elevated temperature Lower CTE Better wear resistance

Properties of MMCs

KK Chawla, Composite materials, 2nd edition, 2012, Springer.

Effect of dispersed material on modulus

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10 F.L. Matthews and R.D. Rawlings, Composite Materials: Engineering and Science, Woodhead Publishing Limited, 2008.

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Mid-fuselage structure of Space Shuttle Orbiter showing Aluminum-Boron tubes. (Photo courtesy of U.S. Air Force/NASA).

6061Al alloy-40%C fiber

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Commercial MMCs Multi-filamentary superconductor

F.L. Matthews and R.D. Rawlings, Composite Materials: Engineering and Science, Woodhead Publishing Limited, 2008.

19 F.L. Matthews and R.D. Rawlings, Composite Materials: Engineering and Science, Woodhead Publishing Limited, 2008.

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