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A Design Study in Metal Matrix Composite Castings - AAAV Transmission Case                                           

Metal Matrix Composite Alloy Selection

  • Aluminum reinforced with silicon carbide (SiC) particulate has superior elastic modulus, strength, and wear resistance compared to unreinforced aluminum alloy.
  • In addition the SiC reinforced aluminum has enhanced thermal conducivity and a reduced coefficient of thermal expansion.
  • With higher modulus and strength in the aluminum MMC, the wall thickness of a given component can be reduced and weight saved, while still meeting required stiffness and strength targets.

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The key question is -- How much silicon carbide particulate must be added to the aluminum to achieve the desired mechanical properties?


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