Metal Matrix Composites

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Metal Matrix Composites

• Typically use commercial alloy metal for matrix
  material, eg, Aluminum, Titanium.
• Reinforced with ceramic fibres, continuous or
  discontinuous, particles, or whiskers.
• Give improved specific strength and stiffness,
  damping.
• Costs are relatively high.

99 Al2O3 Su3000 MPa E 400 Gpa r 3.95 g/cm3
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Boron Carbide Reinforced Aluminum

• B4C in Al matrix
• Density less than Al alloy
• Can be welded using standard TIG equipment
• Available in the same forms as conventional
  aluminum. Can be pressure cast, extruded, and
  forged. Available in sheet down to foil
  dimensions
• Trade name Boralyn Hlow strength, high
  ductility, E higher strength alloy. Depends on
  matrix alloy.

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Property Comparisons for MMC
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Continuous Fiber-Aluminum Matrix Composites
(CF-AMC)

• Al-2wtCu with 60vol Al2O3 fibre
• Offers high longitudinal strength (1500 MPa) and
  good transverse strength (270 MPa)
• Product forms near net-shape products
• High stiffness
• Lightweight
• Pure Al with 60vol Al2O3 fibre
• Very high longitudinal strength (1650 MPa) and
  moderate transverse strength (140 MPa)
• High stiffness
• Lightweight
• Good corrosion resistance
• Good electrical conductivity
• Product forms near net-shape components and
  continuous wire

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Properties of AMC
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AMC - Specific Properties
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Stress-Strain Response
Longitudinal
Transverse
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Fatigue Strength of AMC
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Titanium Matrix Composite
Electron beam physical vapor deposition coating
high-strength, high-modulus silicon carbide
fibers with Ti-6Al-4V matrix.
Mono-Filament
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Product Applications