1. Department of Production Technology, Faculty of Technology and Education, Helwan University, Saray–El Qoupa, El Sawah Street, 11281 Cairo, Egypt
2. Powder Technology Department, Central Metallurgical Research and Development Institute (CMRDI), P.O. Box 87, Helwan, Cairo, Egypt
3. Basic Science Department, Faculty of Technology and Education, Helwan University, Saray–El Qoupa, El Sawah Street, 11281 Cairo, Egypt
4. Department of Applied Physics and Institute of Natural Sciences, College of Applied Science, Kyung Hee University, Suwon 446-701, Republic of Korea