Energy Efficient Rapid Sintering of Refractory Alloys

Tuesday, October 17, 2023: 11:30 AM
334 (Huntington Convention Center)
Mr. Emmanuel Bamidele , University of Colorado Boulder, Boulder, CO
Prof. Rishi Raj , University of Colorado Boulder, Boulder, CO

IMAT 2023 Abstract Submission

 

 

Energy Efficient Rapid Sintering of Refractory Alloys

 

Emmanuel Bamidele and Rishi Raj

University of Colorado Boulder
Boulder, CO 80309

Abstract:

Two emerging technologies hold the promise of revolutionizing the powder processing and sintering of high temperature materials, such as refractory metals and ceramics. One of them is electric field and current induced sintering. In this way we report sintering of W powder in less than one minute near 1000 oC without using a furnace, by direct injection of current into powder pressed specimens. The process has the hallmarks of flash sintering which has been widely examined in the sintering of oxides. This report describes the first application of flash to metals. The process is characterized by an increase in conductivity and electroluminescence, and ultrafast diffusion kinetics. Colossal defect generation is suggested by volumetric expansion of nearly 10%. The method has been applied generally to other metals: copper, silver, titanium and nickel

Supported by NASA Award # 80NSSC21K0225

 

See more of: Sustainable Materials Processing and Manufacturing I
See more of: Sustainable Materials & Processes