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Green Compact Temperature Evolution during Current-Activated Tip-Based Sintering (CATS) of Nickel
Department of Materials Science and Engineering, Egypt Japan University of Science and Technology, Alexandria, Egypt
Department of Mechanical Engineering, San Diego State University, San Diego, CA 92182, USA
* Author to whom correspondence should be addressed.
Received: 22 December 2012; in revised form: 17 March 2013 / Accepted: 25 March 2013 / Published: 15 April 2013
Abstract: Current-activated tip-based sintering (CATS) is a novel process where spark plasma sintering conditions are applied through an electrically conducting tip on a locally controlled area on a green powder compact/bed. The localization of electric current in CATS allows for unique temporal and spatial current and temperature distributions within the tip and powder compact. In this paper, special experimental setups were used to monitor the temperature profiles in the tip and at multiple locations on the surface of nickel powder compacts. A variation in the initial green density was found to have a significant effect on the maximum temperature in the tip as well as the temperature distribution across the powder compact. In general, the lowest green density specimens displayed the best conditions for localized densification. The concept of effective current density is introduced and results are discussed in relation to the densification parameter.
Keywords: current activated tip-based sintering; spark plasma sintering; temperature distribution; nickel
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Desouky, A.E.; Moon, K.S.; Kassegne, S.K.; Morsi, K. Green Compact Temperature Evolution during Current-Activated Tip-Based Sintering (CATS) of Nickel. Metals 2013, 3, 178-187.
Desouky AE, Moon KS, Kassegne SK, Morsi K. Green Compact Temperature Evolution during Current-Activated Tip-Based Sintering (CATS) of Nickel. Metals. 2013; 3(2):178-187.
Desouky, Ahmed E.; Moon, Kee S.; Kassegne, Samuel K.; Morsi, Khaled. 2013. "Green Compact Temperature Evolution during Current-Activated Tip-Based Sintering (CATS) of Nickel." Metals 3, no. 2: 178-187.