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

COMPOSITIONFIBER 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

PROCESSING OF MMC

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

Liquid state methods

2. Electroplating and electroforming

Liquid state methods

3. Stir casting

Liquid state methods

4. Pressure infiltration

Liquid state methods

5. Spray deposition

. Vapor Deposition

In-situ fabrication technique

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.

MECHANICAL PROPERTIES OF MMC

STRENGHT OF MMC

YOUNG’S MODULUS OF MMC

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

THE END

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