This document discusses metal matrix composites (MMCs). It defines MMCs as mixtures of two or more constituent materials where one material acts as the reinforcement and the other as the matrix. MMCs can be classified as having either continuous or discontinuous reinforcement. The document outlines various manufacturing processes for MMCs including casting, diffusion bonding, and powder processing. It also discusses properties of MMCs such as their high stiffness, toughness, and thermal conductivity. Finally, the document lists some applications of MMCs in industries such as aerospace and automobiles and also notes some drawbacks like high costs and complex fabrication.

1. 1
METAL MATRIX
COMPOSITE
MILAN DUBEY
CSJMA14001390240

2. SUBSETS
2
 IMPORTANCE
 INTRODUCTION
 CLASSIFICATION OF MMC
 MANUFACTURING
 PROPERTIES
 APPLICATIONS
 DRAWBACKS
 REFRENCES

3. NEED OF THIS
SCIENCE
3
 To modify properties of material as per
demand .
 Fulfillment of excessive demand .
 To enhance efficiency .

4. COMPOSITE
4
 Mixture of two or more constituent .
 Natural – bones , teeth , pearl , etc .
 Synthetic – pmc , mmc , cmc .

5. METAL MATRIX
COMPOSITE
5
 It is highly specific .
 Not thermodynamically consistent .

6. CLASSIFICATION OF
MMC
6
Discontinuous
Reinforcement
Continuous
Reinforcement

7. MANUFACTURING
7
PRIMARY PROCESS
• casting
• diffusion bonding
• liquid infiltration
• deposition
• powder processing
•SECONDARY PROCESS
• shaping
• machining
• forming
• brazing

8. TECHNIQUES
8
 SOLID STATE PROCESSING .
 SPRAY FORMING .
 IN SITU PROCESSING .
 LIQUID STATE PROCESING .
• casting or liquid infiltration
• squeeze casting or pressure infiltration.

9. 9
SQUEEZE CASTING IN-SITU TECHNIQUE
LIQUID PROCESSING
METHODS

10. PROPERTIES OF MMC
10
0
50
100
150
200
250
300
350
0.1 0.3 0.5 0.7
Young’smodulusE(GPa)
YOUNG’S MODULUS VS FIBER
FRACTION
Axial
Transverse
Volume fraction of reinforcement (Vf)
YOUNG’S MODULUS:
 Measure of
stiffness.
 Anisotropic for
continuous fiber.
 Particle
reinforcement
shows lower
increase.

11. TOUGHNESS:-
11
FIBER DIAMETER (µm) ENERGY ABSORBED (kJ/m²)
100 90
140 150
200 200-300
 Measure of energy absorbed in the process of
fracture
 Particle reinforcement shows greater toughness
than long fiber.

12. THERMAL CONDUCTIVITY:-
12
 Ability to transfer
heat.
 Higher the non-
metallic
reinforcement
volume fraction
lower will be
thermal
conductivity of
MMC. 0
1
2
3
4
5
6
7
300 310 320 330 340
45%
30%
15%
Thermalconductivity(W/mK)
Temperature ( K )

13. APPLICATION
13
 AEROSPACE INDUSTRY .
 AUTOMOBILE INDUSTRY .
 CHEMICAL INDUSTRY .
Carbon reinforced copper have very
good thermal conductivity .
13

14. DRAWBACKS
14
 Machining involve diamond tool so
expensive process .
 Lack of analytical modeling method .
 Relatively immature technology .
 Complex fabrication method .

15. REFRENCES
15
 Encyclopedia of chemical technology - kirk
Othmer
 Metal matrix composite - j. Paulo davim
 www.Iosrjournals.Org
 MMC innovation application –
t s srivastan, yuzheng zhang

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