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Metals 2013, 3(2), 178-187; doi:10.3390/met3020178
Article

Green Compact Temperature Evolution during Current-Activated Tip-Based Sintering (CATS) of Nickel

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Received: 22 December 2012 / Revised: 17 March 2013 / Accepted: 25 March 2013 / Published: 15 April 2013
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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 current activated tip-based sintering; spark plasma sintering; temperature distribution; nickel
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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.

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