Research Summary on the Processing, Mechanical and Tribological Properties of Aluminium Matrix Composites as Effected by Fly Ash Reinforcement

Alaa Mohammed Razzaq,Uday M Basheer,Dayang Laila Majid,Hakim S Sultan Aljibori

doi:10.3390/cryst11101212

Alaa Mohammed Razzaq, Uday M Basheer + Show 2 more

Open Access

https://doi.org/10.3390/cryst11101212

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Abstract

Fly ash is the main waste as a result of combustion in coal fired power plants. It represents about 40% of the wastes of coal combustion products (fly ash, boiler ash, flue gas desulphurization gypsum and bottom ash). Currently, coal waste is not fully utilized and waste disposal remains a serious concern despite tremendous global efforts in reducing fossil fuel dependency and shifting to sustainable energy sources. Owing to that, employment of fly ash as reinforcement particles in metallic matrix composites are gaining momentum as part of recycling effort and also as a means to improve the specifications of the materials that are added to it to form composite materials. Many studies have been done on fly ash to study composite materials wear characteristics including the effects of fly ash content, applied load, and sliding velocity. Here, particular attention is given to studies carried out on the influence FA content on physical, mechanical, and the thermal behavior of Aluminium-FA composites. Considerable changes in these properties are seen by fly ash refinement with limited size and weight fraction. The advantage of fly ash addition results in low density of composites materials, improvement of strength, and hardness. It further reduces the thermal expansion coefficient and improve wear resistance.

Highlights

In a recent report by the US Energy Information Administration, for the year 2020, coal power plants account for 19.3% of energy source for US, ranked third behind natural gas (40.3%) and nuclear (19.7%) [1]
Preheated fly ash at various temperatures, 400, 500, 600, 660, 700, and 800 °C were added to molten ADC6 at 0.1, 0.15, 0.2 g/s of flow rate. They used the mold Immersed Rapid Solidifications (MIRS) which is a new method to evaluate fly ash composite slurry and Shueiwan et al [54] fabricated ADC6 that was filled with 5 wt.% FA by stir casting
Fly ash as areinforcement reduces the density of composite material as well as mechnical properties improved The compressive strength increased by 16% with 12 wt.% of fly ash

Summary

Introduction

In a recent report by the US Energy Information Administration, for the year 2020, coal power plants account for 19.3% of energy source for US, ranked third behind natural gas (40.3%) and nuclear (19.7%) [1]. The major setbacks encountered in the production of discontinuously reinforced aluminum matrix composites (DRAMCs) are high cost, inferior ductility, low fracture toughness, and low availability of conventional ceramic reinforcing materials especially in developing countries [17,18,19]. The fracture toughness and ductility of DRAMCs improved without significant drop in strength upon the utilization of nano-particulates as reinforcing materials [27,31,32,33,34] In spite of their marked mechanical property improvement capacity, factors such as high cost and low availability especially for developing countries limits the utilization of nanoparticulates. These sets of demands are only achievable by utilizing nonmetal inorganic reinforcement materials [15]

Particulate Reinforcement

Fabrication Methods of Aluminum Matrix Composites

FA Effect on Mechanical Physical Properties of Aluminum Composites Material

Effect of FA on Wear Behaviour

Findings

Conclusions