1. Department of Metallurgical and Materials Engineering, University of Lagos, Lagos, Nigeria;
2. Department of Materials and Metallurgical Engineering, University of Ilorin, Ilorin, Nigeria;
3. Department Materials Science and Engineering, Kwara State University, Malete, Nigeria;
4. Department of Physics, Karunya University, Coimbatore, India;
5. Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa;
6. School of Chemical and Metallurgical Engineering, Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, South Africa