Politician says Russia vs Mexico football game will be interesting to watchSport June 23, 21:11
Kyrgyz president sees revival of relations with Russia as major result of his tenureWorld June 23, 20:49
Ex-premier says initiative to impeach Poroshenko stems from Ukraine’s economy collapseWorld June 23, 20:20
This week in photos: Confederations Cup opening and summer solstice celebrationsSociety & Culture June 23, 19:11
Turkish ambassador to Russia: Moscow and Ankara to join efforts in war on terrorWorld June 23, 18:45
Ukraine’s finance ministry files appeal to London Court against Russia in $3 bln debt caseBusiness & Economy June 23, 18:42
Ukrainian society tired of Poroshenko’s policy — expertRussian Politics & Diplomacy June 23, 17:58
Deutsche Welle sees Russian international broadcasters as threat to European ideasWorld June 23, 17:34
Watchdog claims Telegram provides means of communication to terroristsBusiness & Economy June 23, 16:45
MOSCOW, April 4. /TASS/. A group of researchers from the Siberian Federal University (the SFU) headed by Galina Zeyer, dean of Material Science and Materials Processing Technology department, came up with a new method of diffused welding under high pressure with the use of a layer of a special material. The invention could be used for heterogeneous materials welding in various fields of engineering, the SFU says.
“This method does not require special equipment and is economically advantageous for the production of items which demand diffused welding”, - the press release says.
Diffused welding is a connection of two homogeneous or heterogeneous materials under high pressure and temperature range of 0.4-0.8 of melting temperature of more fusible material in the mixture. In this newly-elaborated method, the SFU researchers propose to add an interlaminar layer facilitating the connection of materials. A suspension of nickel powder and a liquid binder, polyvinyl butyral solution, can act as such layer.
“Interlaminar layers assist in decreasing chemical heterogeneity and thermodynamic disequilibrium, excluding the formation of intermetallic compounds (chemical compounds of metals) in the weld junction and significantly reduce deformation impact of high temperature on welded materials and details. Besides, the new method facilitates lowering the temperature of diffused welding,” Zeyer says.
The researchers believe that the new method could assist in getting a durable connection of heterogeneous materials, saving their structure and initial characteristics, and increase the quality of a welded connection due to ensuring a uniform thickness, powder layer density, and lesser residual porosity.