Volume 10, Issue 1 (May)

Articles in this Issue

7 articles
1
Research Article

Microstructure and Hardness Profiles of Hybrid Laser-Arc Welded Joint for UltrahighStrength Steel.

Olugbade Emmanuel*, Zhou Bin, Ikeagwuonu Clement, Yang Li, Huang Gen-Zhe

In this investigation, hybrid laser-arc welding was performed on 6-mm thick ultrahigh-strength quenched and tempered steel  plates. Laser-arc welds were characterized for hardness and metallurgical properties in three defined cooling cycles. Destructive  tests of the joints revealed that the joints were characterized by tensile strength similar to that of the base material. Microstructural  charac...

Jun, 2020 pp. 1-9
2
Research Article

Optimization of the Green Synthesis of Tin Oxide Nanoparticles by Response Surface Methodology (RSM) using Box-Behnken Design.

Kareem Aduagba Ganiyu*, Abdulrahman Asipita Salawu, Abdulkareem Ambali Saka, Tijani Jimoh Oladejo

Tin oxide nanoparticles has been synthesized via green route using SnCl .2H O and Euphorbia trigona (African  2  2  cactus) plant extract as precursors. In this green route process parameters such as, solution pH, precursor concentration  and synthesis temperature were optimized to produce nanoparticles with smaller size. The degree of sensitivity of the  process parameters vis-a-viz towards optim...

Jun, 2020 pp. 10-17
3
Research Article

Synthesis and Surface Characterisation of Cu-Doped Tin Oxide Thin Film for Optoelectronic Applications.

Adewumi Olusegun Emmanuel*, Taleatu Bidini Alade, Adewinbi Saheed Adekunle, Busari Rafiu Adewale, Oyedotun Kabir Oyeniran, Omotoso Ezekiel

Copper doped tin oxide thin film was synthesised by electrodeposition technique. Film growth was maintained at  cathodic potential of 1.60 V at a varied deposition time. Surface morphological studies of the deposited films were  achieved by field emission scanning electron microscopy (FE-SEM). The scanning electron microscopy image revealed  evenly distributed films, across the substrate with rice...

Jun, 2020 pp. 18-23
4
Research Article

Comparative Activity of Undoped TiO2 and 5% N-TiO2 for Photocatalytic Degradation of Indigo Carmine Dye

Oyegbami Victoria Bola*, Odebunmi Ezekiel Oluyemi, Odeyemi Omolola Titilayo, Gbadamosi Mustapha Tunde

TiO was synthesized by Sol-gel method and doped by Impregnation of Nitrogen from Ammonium Chloride to obtain 5%  2  N-TiO . The undoped TiO and N-doped TiO photocatalysts were characterized by Fourier Transform Infrared (FTIR)  2  2  Spectroscopy, X-Ray Diffraction (XRD) Crystallography and Scanning Electron Microscopy (SEM). Investigation of  the activities of the photocatalysts for degradation o...

Jun, 2020 pp. 24-29
5
Research Article

Effect of Counterface Material on Tribological Behavior of AISI 304L Stainless Steel Under Marginally Lubricated Contact

Olofinjana Bolutife*, Ajayi Oyelayo, Lorenzo-Martin Cinta, Ajayi Ezekiel Oladele Bolarinwa

The properties of surfaces in contact are known to have significant influence on the tribological behavior of any  tribosystem in different contact situations. In the present work, the effect of using different ball counterface material on  the tribological behavior of AISI 340L stainless steel under marginally lubricated contact was studied. The frictional  behavior was evaluated using a ball-on-...

Jun, 2020 pp. 30-36
6
Research Article

Physicochemical and Heavy Metals Analysis of Water from Different Sources in Usen, Edo State, Nigeria.

Maliki Muniratu*, Abel Inobeme, Kelani Tawakalit Omolara, Eziukwu Chinenye A.

The study investigated the physicochemical properties and heavy metal contents of water samples from three major  sources; river (sample A), borehole (sample B), and well (sample C), in Usen using standard procedures. The heavy metal  content was analyzed using Atomic Absorption Spectrometer. The results obtained were compared to permissible limits  based on WHO standard. The pH of the water sampl...

Jun, 2020 pp. 37-41
7
Research Article

Impedance and Modulus Spectroscopy of Nanocrystallite Barium Titanate Ceramic Using Mechanochemical Method.

Muazu Alhassan*, Ahmadu Umaru, Auwalu Inusa A, Zangina Tasiu, Nura Abdullahi, Maharaz M. Nasir

Nanocrystalline BaTiO (BT) powder was synthesized by a combination of the solid-state and mechanochemical  method. X-ray diffraction, field emission scanning electron microscopy, and impedance spectroscopy utilised  appropriately to characterize the BT sample (ceramic). The X-ray diffraction confirmed a single-phase perovskite  compound of cubic symmetry with space group Pm-3m. The crystallite siz...

Jun, 2020 pp. 42-50
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