Materials 2013, 6(7), 2612-2632; doi:10.3390/ma6072612
Article

Localized Overheating Phenomena and Optimization of Spark-Plasma Sintering Tooling Design

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Received: 22 April 2013; in revised form: 9 June 2013 / Accepted: 17 June 2013 / Published: 25 June 2013
(This article belongs to the Special Issue Progress in Net-shaped PM (Powder Metallurgical) Parts)
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.
Abstract: The present paper shows the application of a three-dimensional coupled electrical, thermal, mechanical finite element macro-scale modeling framework of Spark Plasma Sintering (SPS) to an actual problem of SPS tooling overheating, encountered during SPS experimentation. The overheating phenomenon is analyzed by varying the geometry of the tooling that exhibits the problem, namely by modeling various tooling configurations involving sequences of disk-shape spacers with step-wise increasing radii. The analysis is conducted by means of finite element simulations, intended to obtain temperature spatial distributions in the graphite press-forms, including punches, dies, and spacers; to identify the temperature peaks and their respective timing, and to propose a more suitable SPS tooling configuration with the avoidance of the overheating as a final aim. Electric currents-based Joule heating, heat transfer, mechanical conditions, and densification are imbedded in the model, utilizing the finite-element software COMSOL™, which possesses a distinguishing ability of coupling multiple physics. Thereby the implementation of a finite element method applicable to a broad range of SPS procedures is carried out, together with the more specific optimization of the SPS tooling design when dealing with excessive heating phenomena.
Keywords: Spark Plasma Sintering (SPS); Field Assisted Sintering (FAST); finite element; modeling; temperature distribution; overheating
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MDPI and ACS Style

Giuntini, D.; Olevsky, E.A.; Garcia-Cardona, C.; Maximenko, A.L.; Yurlova, M.S.; Haines, C.D.; Martin, D.G.; Kapoor, D. Localized Overheating Phenomena and Optimization of Spark-Plasma Sintering Tooling Design. Materials 2013, 6, 2612-2632.

AMA Style

Giuntini D, Olevsky EA, Garcia-Cardona C, Maximenko AL, Yurlova MS, Haines CD, Martin DG, Kapoor D. Localized Overheating Phenomena and Optimization of Spark-Plasma Sintering Tooling Design. Materials. 2013; 6(7):2612-2632.

Chicago/Turabian Style

Giuntini, Diletta; Olevsky, Eugene A.; Garcia-Cardona, Cristina; Maximenko, Andrey L.; Yurlova, Maria S.; Haines, Christopher D.; Martin, Darold G.; Kapoor, Deepak. 2013. "Localized Overheating Phenomena and Optimization of Spark-Plasma Sintering Tooling Design." Materials 6, no. 7: 2612-2632.

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