Gazprom chairman says gas will follow oil in global energy balance by 2040Business & Economy January 24, 14:41
IAC says Boeing crashed outside Bishkek was in good technical conditionWorld January 24, 14:24
Syria ceasefire monitoring mechanism may be included in separate document — sourceWorld January 24, 14:11
Italian top diplomat urges EU and US to solve sanctions issue togetherWorld January 24, 14:06
World athletics body to give timeframe for admitting Russian athletes to competitionsSport January 24, 13:36
Analyst believes China’s missiles near Russian borders targeted against USRussian Politics & Diplomacy January 24, 13:14
Russia, Turkey agree to continue work with Syrian participants in Astana meetingRussian Politics & Diplomacy January 24, 13:07
Press review: Syria peace talks in Astana and Hungary's losses from anti-Russian sanctionsPress Review January 24, 13:00
Source claims Russia, Iran and Turkey agree on mechanism to monitor Syria ceasefireWorld January 24, 12:47
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.