Development of Metal Matrix/Coconut Shell Ash Particulate Composites for Automotive Application

Description

Download Development of Metal Matrix/Coconut Shell Ash Particulate Composites for Automotive Application. Mechanical Engineering students who are writing their projects can get this material to aid their research work.

Abstract

This research presents the development of metal matrix composite using coconut shell ash as the reinforcement for automotive applications. Test samples were produced by stir casting method and machined into standard sizes for the purpose of determining microstructural analysis, physical, thermal, corrosion, mechanical and wear properties.

The results obtained were compared with standard composite materials used in the production of the connecting rods. The metal matrix composites (MMC‟s) were prepared by addition of 3, 6, 9, 12, and 15wt% CSAp particulates. The results of the microstructural analysis of the composites revealed the uniform distribution of the coconut shell ash particles.

The increase in reinforcement volume fraction resulted in the decrease of matrix grain size in the composites. The results obtained also showed that the addition of coconut shell ash particles reinforcement to Al-Si-Fe alloy increased the tensile strength and the hardness value of composites, but slightly reduced the impact energy.

Introduction

The term “composite” broadly refers to a material system that is composed of a discrete constituent (the reinforcement) distributed in a continuous phase (the matrix) and which derives its distinguishing characteristics from the properties of its constituents from the geometry and architecture of the constituents.

Composite materials are usually classified on the basis of the physical or chemical nature of the matrix phase, e.g., polymer matrix, metal-matrix and ceramic composites. In addition, there are some reports to indicate the emergence of intermetallic matrix and carbon-matrix composites (Surappa and Rohatgi, 1981).

Aluminium alloys are quite attractive due to their low density, their capability to be strengthened by precipitation, their good corrosion resistance, high thermal and electrical conductivity, and their high damping capacity (Whitehouse et al., 1991).

Aluminum matrix composites (AMCs) have been widely studied since the 1920s and are now used in sporting goods, electronic packaging, amour, and automotive industries (Skibo et al, 1988 and Donne et al, 1990).

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