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NOOR FAREHA YACOB

0723488

NURFARAH AIN ISHAK

0811076

SUPERVISOR: DR. YASSIN LUTHFI NIMIR



OVERVIEW

2

INTRODUCTION

LITERATURE REVIEW

METHODOLOGY

RESULTS AND DISCUSSION

CONCLUSION



The specimens were fabricated by using powder

metallurgy method consist of mixing, compaction and

sintering process.

3



4

Application of aluminum- silicon

carbide composite

Aerospaceindustries

Automotiveindustries

Electronicindustries



5

Objective

Fabricate Study InvestigateEliminateporosity

Analyze

Problem Statement

Aluminum is known for low density but the problem is low

melting point and strength. By adding the silicon carbide, it

will improve the mechanical properties of aluminum.

Specimens were prepared from Al powder reinforced with(10%, 20% and 30% of silicon carbide particulates).



6

Composites are classified by:

1) their matrix (polymer , ceramic, metal),

2) their reinforcement which includes the chemicalnature(oxides, carbides, nitrides), shape (continuous,

short, whiskers, particulate) and orientations,

3) their processing routes.

LITERATURE REVIEW



7

Dr. Ali Hubi Haleem , Newal Muhammad Dawood from

Babylon University

- Fabricated the Al-SiC composite using stir-casting process

o W.M. Khairaldien, A.A Khalil and M.R. Bayoumi- Fabrication of aluminium-silicon carbide composites using

powder metallurgy at sintering point temperatures above

the melting point.

o

Manoj Singla, Lakhvir Singh and Vikas Chawla- Wear properties of Al-SiC composite



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METHODOLOGYStart

Powder MixingAluminium and silicon carbide are mixed together using

ceramic bowl with ethanol as a medium to ³bond´ it together.

Uniaxial compaction

Sample is weighed, placed in the cylindrical mould. The filled

mould is then put into the press. A uniaxial pressure of 8 tones is

applied for 1 minute. Compacted and shaped sample is then

removed.

Pressurized Sintering

The bolt of the jig is tightened after putting the samples and

the pins are placed inside the jig. Samples of different percentage is

placed into the jig and sintered in the vacuum furnace at

temperatures of 600 C, 650 C and 700 C for 5 hours each time.



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Metallographic Sample Preparation

After the sintering process is finished, the sample is polishedusing 0.05 micron alumina oxide suspension to remove the scratches.

Grinding is not involve in the process. Microstructure of the samples

were observed and analyzed under the optical microscope

Hardness test

Hardness of the samples are measured using Vickers micro

hardness tester. As the size of the diamonds are big, indentions are

run using the machine and the measurement of the diamonds are

obtained using the computer by locating it and measuring itsdiameter.



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hardness vs composition of siC for 600C,650C and 700C

hardness vs temperature for 10%, 20% and 30% siC



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Microstructure results

T = 600ºC (time = 5hrs)10% SiC 20% SiC

30% SiC

Silicon Carbide

Aluminium



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T = 650ºC (time = 5hrs)

10% SiC 20% SiC



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T = 700ºC (time = 5hrs)

10% SiC 20% SiC

30% SiC



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} Increasing the composition of silicon carbide will

increase the hardness of the material for varying

temperatures of 600°C, 650°C and 700°C.

} As temperature increases the hardness of the materialdecreases.

} The silicon carbide particulate is homogenously

distributed in the aluminium matrix composite.



FUTURE PLAN

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TASK/WEEK 1 2 3 4 5 6 7 8 9 10 11 12 13 14

CONSULT SUPERVISOR ON HOW

THE PROCESS SHOULD BE

FIND MORE JOURNAL FOR

REFFERENCES

START EXPERIMENT USING

DIFFERENT TYPE OF POWDER

DO THE MIXING AND

COMPACTION PROCESS

RUN THE SINTERING PROCESS

MEASURE THE HARDNESS,LOOK

AT MICROSTRUCTURE

COMPILE ALL THE RESULTS

COMPARE THE RESULT

START DOING REPORT

SUBMISSION



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THANK YOUTHANK YOU

Q & A SESSIONQ & A SESSION

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