Browsing by Author "Omoniyi, P.O."

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    Cooling potential of formulated bio-quenchant oils on cast Aluminium alloy material.
    (University of Chemical Technology and Metallurgy (UCTM), Sofia, Bulgaria, 2020) Adekunle, A.S.; Adeleke, A.A.; Gbadamosi, T.A.; Nwosu, F.O.; Odusote, J.K.; Omoniyi, P.O.; Popoola, O.T.; Adebiyi, K.A.
    The biodegradable vegetable oil based quenchants can serve as cooling media alternative to that of the toxic non-biodegradable petroleum based mineral oil in a heat treatment of aluminium and its alloy. 70 vol. % of edible vegetable oil are blended with 30 vol. % of Jatropha oil to form bio-quenchant oils for Aluminium (Al)-alloy probe treated at 500oC and soaked for 15 min in a muffle furnace. The cooling potential properties such as the cooling rate, the heat transfer coefficient, the Grossman quench severity and the biot number are investigated. The results obtained show that the blended bleached (BB) melon oil provides the highest cooling rate of 49.30oC s-1, while the blended raw (BR) palm oil ensures the lowest cooling rate of 18.45oCs-1. Heat transfer coefficients of 704.6 Wm-2K-1, 432.3 Wm-2K-1, and 394.4 Wm-2K-1 are exhibited by the blended bleached melon oil, the blended raw melon oil and the blended bleached groundnut oil, respectively. They are found higher than that of a petroleum based mineral oil, which amounts to 68.7 Wm-2K-1. The lowest heat transfer coefficient of 272.11 Wm-2K-1 is obtained in case of using a blended raw palm oil. The quench severity of the blended bleached melon oil, the blended raw melon oil and the blended raw groundnut oil refers to a Grossman H-factor of 1.01 m-1, 0.78 m-1, and 0.67 m-1, respectively. The latter values are higher than that obtained in case of a blended raw palm oil, which is equal to 0.37 m-1. However, the heat flow parameters obtained reveal that the blended bleached and the blended raw melon and groundnut oil can be characterized as fast quenching oils, while the blended bleached and the blended raw palm oil can be characterized as medium quenching oils of results comparable to and even better than those of the industrial petroleum based mineral oil
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    Production of Automobile Brake Pads from Palm Kernel Shell, Coconut Shell, Seashell and Cow Bone
    (Faculty of Engineering and Technology, Adeleke University., 2021) Popoola, O. T.; Rabiu, A.B.; Ibrahim, H.K.; Omoniyi, P.O.; Babatunde, M.A.; Muhammed, N.; Isiaq, F.O.
    The commercial brake pads made from asbestos are found to be carcinogenic hence, researchers and brake pad manufacturers have diverted attention to the use of agricultural wastes to replace asbestos made brake pads. This study investigated the use of palm kernel shell, coconut shell, seashell and cow bone as base material for the development of automobile brake pads. This work focused on combining the aforementioned agricultural wastes with 45% base material, 30% binder, 10% filler, 10% lubricant, and 5% abrasive. The samples were produced using sieve grades of 150 µm particle size and were compressed in a mould at a pressure of 15MN/m2 and a temperature of 195oC. Results were compared with both commercial asbestos-based brake pad and laboratory formulated palm kernel shell-based brake pad. The results showed that sample S3 which is a combination of palm kernel shell, coconut shell and seashell; and sample S5 which is a combination of cow bone, seashell and palm kernel shell are the best substitute to replace the commercially manufactured asbestos brake pad.
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    Production of Automobile Brake Pads from Palm Kernel Shell, Coconut Shell, Seashell and Cow Bone
    (Faculty of Engineering and Technology, Adeleke University, 2021) Popoola, O. T.; Rabiu, A.B.; Ibrahim, H.K.; Omoniyi, P.O.; Babatunde, M.A.; Muhammed, N.; Isiaq, F.O
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    Suitability of pulverized cow bones as a paving tile constituent
    (IOP Conference series: Materials Science and Engineering, 2018) Aweda, J.O.; Omoniyi, P.O.; Ohijeagbon, I.O.
    Economic advantage of waste has been clamoured severally in order to improve the environment and reduce pollution. In Nigeria, the common materials used for the production of paving tiles are granite dust and cement, in some cases silica sand is added. This study is aimed at investigating the feasibility of using available raw materials such as laterite, silica sand and pulverized cow bones to develop paving tiles. Tiles of 200 mm × 100 mm × 60 mm were produced and the effects of various materials added were investigated and analysed. The production method employed was casting and curing was done for twenty-eight (28) days. Physical and mechanical analyses of the paving tiles showed that the tiles with mixing ratio of 4:1:3 (laterite: pulverized cow bones: silica sand) with 20% cement stabilization was the optimum mix ratio, producing the maximum compressive strength and modulus of rupture of 5.05 MPa and 1.83 MPa respectively