C. I. Nwoye

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

E. M. Ameh

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

L. C. Oshionwu

Department of Industrial Physics, Ebonyi State University, Abakiliki, Nigeria

M. A. Allen

Department of Mechanical Engineering, Micheal Okpara University, Umuahia, Nigeria

M. O. Nwankwo

Department of Industrial Physics, Ebonyi State University, Abakiliki, Nigeria

N. E. Idenyi

Department of Industrial Physics, Ebonyi State University, Abakiliki, Nigeria