Affiliation: | (1) Faculty of Physics and Engineering, Department of Powder Metallurgy, Refractories, and Composites, Kiev Polytechnic Institute, 252056 Kiev, Ukraine;(2) Institute of Physics and Technology of Materials, Bucharest-Magurele, PO BOX MG-7, Romania;(3) Faculty of Physics and Engineering, Department of Powder Metallurgy, Refractories, and Composites, Kiev Polytechnic Institute, 252056 Kiev, Ukraine |