Metal Matrix Composite (MMC)

METAL MATRIX COMPOSITE
PRESENTED BY STUDENT ID
Md. ISHTIAK ASHRAF 13.02.08.005
DIPRAJIT BISWAS 13.02.08.006
WASIFUR RAHMAN OMI 13.02.08.048
SHAOWN RANA 13.02.08.050

CONTENTS
 INTRODUCTION
 CLASSIFICATION OF MMC
 COMPOSITION
 REIGNFORCEMENT
 PROCESSING OF MMC
 MANUFACTURING AND FORMING
 APPLICATION OF METAL MATIX COMPOSITES
 DEMAND
 CHARACTERISTICS
 ADVANTAGES
 DISADVANTAGES
 FUTURE APPLICATION OF MMC

INTRODUCTION
A metal matrix composite (MMC) is composite
material with at least two constituent parts, one being
a metal necessarily, the other material may be a
different metal or another material, such as
a ceramic or organic compound.

History
 Initial work in late 1960s was stimulated by the high-
performance needs of the aerospace industry
 Steel-wire reinforced copper, were among the first
continuous-fiber reinforced metal composites
 Boron filament was the first high-strength, high-
modulus reinforcement in MMC

WHY WE USE MMC?
 High strength
 High stiffness
 Toughness
 Density
 Good wear resistance
 Damping capacity
 Specific modulus

CLASSIFICATION OF MMC
Composites with metal phase
Dispersion
hardened & particle
composites
Layer
composites
(Laminates)
Fiber
composites
Infiltration
composites

COMPOSITION
FIBER MATRIX
Graphite Aluminum
Magnesium
Lead
Copper
Boron Aluminum
Magnesium
Titanium
Alumina Aluminum
Lead
Magnesium
Silicon carbide Aluminum
Titanium
Super alloy (cobalt Base)

REIGNFORCEMENT
 Embedded into matrix
 Change physical properties, wear resistance, friction
co efficient, thermal conductivity
 Continuous or, discontinuous

Manufacturing and Forming
Methods
 Solid state methods
 Semi-solid state methods
 Liquid state methods
 Vapor Deposition
 In-situ fabrication technique

Solid state methods
1. Powder blending and consolidation

Solid state methods
2. Foil diffusion bonding

Semi-solid state methods
 Semi-solid powder processing

Liquid state methods
1. SQUEEZE CASTINGS

2. Electroplating and electroforming

3. Stir casting

4. Pressure infiltration

5. Spray deposition

APPLICATIONS OF MMC
 Drive shaft
Material : AlMg1SiCu+20% Al2O3P
Processing : extrusion from cast feed material

 Vented passenger car brake disk
Material : G-AlSi12Mg + 20% vol. SiCp
Processing : Sand / Die casting

 Longitudinal bracing beam for planes
Material : AlCu4Mg2Zr + 15 % vol. Cp
Processing : extrusion or, forging of casted feed
material.

 Disk brake calliper for passenger cars
Material : Aluminum alloy with nextel ceramic
fiber 610
Weight reduction : 55% cast iron compared

 Partial short fibers reinforced light metal
diesel pistons

 Tank armors
Material : Steel reinforced with Boron nitride

 Honda has used aluminum metal matrix
composite cylinder liners in some of their
engines, including the B21A1, H22A and
H23A, F20C and F22C

 Toyota has since used metal matrix
composites in the Yamaha-designed
2ZZ-GE engine

 The F-16 Fighting Falcon uses monofilament
silicon carbide fibers in a titanium matrix for a
structural component of the jet's landing gear.

 12Mid-fuselage structure of space shuttle
orbiter showing boron-aluminum tubes

 Al high gain antenna wave guides/boom for
the Hubble Space Telescope

Demand
 Low density,
 Mechanical compatibility,
 Chemical compatibility,
 Thermal stability,
 High Young’s modulus,
 High compression and tensile strength,
 Good process ability,
 Economic efficiency.

Advantages
 Low coefficient for thermal expansion
 Fire resistance, wear resistance.
 Higher transverse stiffness , strength &
modulus
 No moisture absorption
 Higher electrical and thermal conductivities
 Better radiation resistance
 Some reinforcing fibers are inexpensive
 Casting is low cost and net shaped process

Disadvantages
 Some fabrication processes are complex and
expensive
 Higher cost of some reinforcing fibers
 Relatively immature technology
 Machining difficult
 Complex fabrication methods
 Reinforcing material may reduce ductility and
fracture toughness
 Fiber-matrix interactions at high temperature
degrade fibers

FUTURE PLANS & APPLICATION
 Aerospace & Army defense
 DRTi offers excellent values of absolute
strength and stiffness as well as specific
strength and stiffness.
 Discontinuously reinforced metals
 Decreasing cost
 More mature production system

Metal Matrix Composite (MMC)

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