Williams, Joseph Ajuwaeze and Covenant University, Theses (2022) EFFECT OF MAIZE HUSK REINFORCEMENT ON THE MECHANICAL PROPERTIES OF 1170 ALUMINIUM. Masters thesis, Covenant University Ota.
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Abstract
The growing global population is increasing waste generation, and agricultural and industrial food processing waste is a major ecological risk. These wastes, improperly disposed of by uncontrolled landfill disposal, incineration, or indiscriminate dumping, constitute a threat to society. In order to decrease the environmental degradation and pollution burden of these wastes, they are being aimed toward recycling and reuse as a possible resource in fulfilling the rising need for lightweight, high-quality, high-performance, and low-cost materials for a variety of applications. The majority of the population in West Africa and Nigeria consumes maize as a staple diet, which presents an opportunity for waste generation. Apart from the seeds, the remaining parts of the maize (the cob and husk) are not commonly eaten. Recent green reinforcement research has focused on the usage of husks from rice, coconut, and even palm kernel. Thus, this study investigates the development of an Aluminium Matrix Composite (AMC) using maize husk particle (MHP) as a reinforcement to the 1170 aluminium alloy. Stir casting is chosen as the composite fabrication process route due to its relatively low costs and efficiency. The mechanical properties of the MHP reinforced aluminium composite are compared to those of the unreinforced metal. All specimens were mechanically characterized for tensile, hardness, thermal conductivity properties, corrosion rate, potentiodynamic polarization, and open circuit potential analysis. The tensile tests demonstrated that raising the wt.% decreased the specimen's tensile modulus whilst increasing the wt.% of finer particles of smaller grain sizes of reinforcement increased its hardness properties. Thermal conductivity improved as reinforcement wt.% increased. Compared to the control specimen, the corrosion rates determined from the weight loss investigation indicated variations in the corrosion properties of the specimens in the various solutions. The varying mix percentages influenced the properties of the specimens. It was observed that the presence, particle size and quantity of reinforcement in the matrix positively affects the corrosion behaviour of composite materials through the creation of corrosion-resistant oxides.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Material Innovation, Reinforcement, Composites, Aluminium matrix composites (AMCs), green additives, stir casting |
| Subjects: | T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | nwokealisi |
| Date Deposited: | 07 Sep 2022 15:37 |
| Last Modified: | 07 Sep 2022 15:37 |
| URI: | http://eprints.covenantuniversity.edu.ng/id/eprint/16157 |
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