Department of Material Science and Engineering

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Browsing Department of Material Science and Engineering by Author "Abdul Ganiyu Funsho Alabi"

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    Emerging hybrid particle‑reinforced high‑density polyethylene nanocomposite for bone replacement
    (Springer, 2023-04-14) Sefiu Adekunle Bello; Oluwatosin Eunice Egbanubi; Abdul Ganiyu Funsho Alabi
    The study harnesses snail shell and pumpkin pods (wastes) for green productions of materials for biomedical applications. Snail shell and pumpkin pod nanoparticles were produced and incorporated into the high-density polyethylene (HDPE). Nanoparticles and nanocomposites produced were examined. Results indicate that both nanoparticles are relevant medically and fit in as reinforcements for developing materials for biomedical applications. Improvement in the tensile properties, flexural properties, and impact energy values up to a certain percentage by weight of nanoparticles additions was noted with degradation in the fracture toughness and strain energy release rate at all percentages by weight of nanoparticle additions. Since maximum flexural strength was recorded at 4% by weight, properties of HDPE containing 4% by weight of the snail shell nanoparticles and that containing 2% each of the snail shell and pumpkin pod nanoparticles were compared with properties of the reported human cortical and trabecular bones in the literature. It is noted that mechanical properties of both nanocomposites are superior to those of the trabecular bones in the thoracic lumber region but are inferior to those of the cortical femoral bones. Therefore, both nanocomposites are mechanically suitable for biomedical applications as materials for replacing the trabecular bones in the thoracic lumber region. However, they are recommended for compatibility screening to ascertain their biological suitability.
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    Microstructure and mechanical properties of Al0.44Si0.32Ni0.09Fe0.05V0.05 alloy containing nanosilica for vehicle bonnet applications
    (Elsevier, 2025-01-25) Sefiu Adekunle Bello; Maruf Yinka Kolawole; Raphael Gboyega Adeyemo; Funsho Olaitan Kolawole; Uthman Ayomide Aliu; Ayodeji Aboyeji; Ahmed Rafiu; Abdul Ganiyu Funsho Alabi; Oyetunji Akinlabi
    Stringent conditions of service that demand improved properties spurs continuous research on expired products to emerge new materials for engineering applications. An alloy was developed from aluminium scraps, ferrosilicon, and nickel alloy. The developed alloy was modified by nanosilica and the produced materials were examined. Result displays silica having an average size of 63.76 nm. In addition, new phases were detected in the alloys due to nanosilica additions and heat treatment. Moreover, the threadlike grain boundary phases of the control alloy changed to rounded tiny particles after the heat treatment. Silica addition to the alloy caused refinements of grains leading to numerous grain boundaries while the grain boundary phases of the heat treated nanosilica modified alloy appear in form of a modulated featherlike structure. An improvement in tensile strength was noted up to 10 wt% of nanosilica additions. Reduction in the impact energy prevails above 6 wt% of nanosilica addition. Heat treatment enhanced tensile properties and impact energies but reduced the hardness values of the developed alloys. Moreso, linear response surface models are significant in predicting the tensile strengths of the developed alloys. Model diagnostics like outlier and Cook’s distance confirm no error in the models. Comparation of properties affirms that tensile strength, tensile strain, and impact energy of the heat treated Al0.44Si0.32Ni0.09Fe0.05V0.05 alloy containing 10 wt% of nanosilica are greater than those of the LEXUS LX570 (2018 model), TOYOTA HILUX (2017 model), and TOYOTA CAMRY (2018 model). Hence, it is a strong, ductile, tough, and less hard material for the bonnet applications.
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    Wear resistance properties of particles‑reinforced epoxy nanocomposites using historical data response surface models
    (Springer, 2023-08-30) Sefiu Adekunle Bello; Raphael Gboyega Adeyemo; Abdul Ganiyu Funsho Alabi; Maruf Yinka Kolawole; Sadam Oniwa; Azim Bayonle Kareem; Muizz Oyeleye Azeez; Bunmi Bisola Olaiya; Tosin Adewale Salami; Sofiu Oladimeji Abdulkareem; Quamdeen Aremu Lawal; Kabir Omoniyi Mohammad; Peter Akinola Akindahunsi; Johnson Olumuyiwa Agunsoye; Suleiman Bolaji Hassan
    Knowledge of wear resistance properties of newly emerging materials as complements to their mechanical properties is important to broaden their applications. This study focuses on wear resistance properties of particle-reinforced epoxy. Results obtained reveal that surface wear of the examined epoxy-based composites occurred by the crack initiation by the abrasive tips of the wear tester, crack propagation and/ or crack pinning. Linear regression model has accuracies of 99.94, 99.92, 99.93, 99.88, 99.91 and 99.92% with respect to various grades of composites examined. Response surface two-functional interaction model exhibits a better goodness of fit than the response surface linear model that shows an outlier. The response surface linear model best fits the wear rates of AlnpUCSnp/epoxy and AlnpCCSnp/epoxy with respective adequate precision of 14.138 and 10.204 affirming the model’s adequate signal. Hence, this study establishes that epoxy-based hybrid composite having 4.7%–82.47 nm-sized aluminium-5.76%–49.85 nm-sized carbonised coconut shell hybrid particles experiences a surface wear of 0.00272721 g per metre when it is in contact with a rough surface under an applied load of 16.71 N at a speed of 0.7 ms−1.