INVESTIGATION OF PROCESSES THAT ARISE IN THE FORMATION OF THE STRUCTURE OF DISPERSION-STRENGTHENED COPPER IN MECHANICAL ALLOYING BY MEANS OF HIGH-RESOLUTION SCANNING ELECTRON MICROSCOPY

摘要

It has been shown that it is possible to fabricate dispersion-strengthened copper with uniform distribution of highly pulverized strengthening particles (< 50 run) in the nanocrystalline matrice (grain size < 50 nm) by means of mechanical alloying. The development of the structure of dispersion-strengthened copper powder in the course of mechanical alloying was investigated using high-resolution scanning electron microscopy. The use of the intraclass. correlation function made it possible to quantitatively analyze the variation in the distribution of the strengthening particles of yttrium oxide in the copper matrice on different stages of mechanical alloying. The authors wish to express their deep appreciation for assistance in the preparation of the article to A. A. Aksenov, Associate Professor at the Department of Physical Metallurgy of Non-Ferrous Metals of the Moscow State Institute of Steel and Alloys (Technological University). The study was completed under the sponsored support of the German Research Society (DFG).