Channel Structures Formed in Copper Ingots upon Melting and Evaporation by a High-Power Electron Beam

Metals

Sergey Bardakhanov²  Andrey Nomoev¹  Makoto Schreiber¹  Alexander Radnaev¹  Rustam Salimov³  Konstantin Zobov²  Alexey Zavjalov²  Erzhena Khartaeva¹ 

[1]Department of Physics and Engineering, Buryat State University, Smolina str., 24a, Ulan-Ude 670000, Russia

[2] E-Mails:

[3]Khristianovich Institute of Applied and Theoretical Mechanics, Siberian Branch of the Russian Academy of Sciences, Institutskaya str., 4/1, Novosibirsk 630090, Russia

[4] E-Mails:

[5]Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences, Lavrenteva str., 11, Novosibirsk 630090, Russia

[6] E-Mail:

关键词: copper;    electron beam;    self-organization;    channel structures;    eutectic microstructure;   

DOI  :  10.3390/met5010428

来源: mdpi

【 摘 要 】

A new phenomenon is described in this paper: the formation of macroscopic channel structures on the bottom of copper ingots which were used as the target for the synthesis of copper nanoparticles by high-power electron beam evaporation and condensation. In the synthesis experiment, the cylindrical copper ingot is melted and partially evaporated in a graphite crucible. The channel structures were originally observed after a series of nanoparticle synthesis experiments in varying conditions. In the present work, various process conditions are varied in order to recreate the structures and identify their mechanism of formation. Conditions in which the channel structures form and do not form are identified and interesting microstructures are observed near the channel structures.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.