C. I. Nwoye

Department of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka, Nigeria

P. O. Offor

Department of Metallurgical and Materials Engineering, University of Nigeria, Nsukka, Nigeria

N. E. Idenyi

Department of Industrial Physics, Ebonyi State, Abakiliki, Nigeria

S. O. Nwakpa

Department of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka, Nigeria

A.O. Agbo

Department of Metallurgical and Materials Engineering, Enugu State University of Science & Technology, Enugu Nigeria