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Article

Development of Ti PVD Films to Limit the Carburization of Metal Powders during SPS Process

1
Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), UMR 6303 CNRS, Université Bourgogne Franche-Comté, BP 47870, CEDEX, 21078 Dijon, France
2
Arts et Metiers Institute of Technology, LaBoMaP, Université Bourgogne Franche-Comté, HESAM Université, 71250 Cluny, France
*
Author to whom correspondence should be addressed.
Academic Editor: Francisco J. G. Silva
Solids 2021, 2(4), 395-406; https://doi.org/10.3390/solids2040025
Received: 26 October 2021 / Revised: 11 November 2021 / Accepted: 30 November 2021 / Published: 3 December 2021
(This article belongs to the Special Issue Solids in Europe)
Spark plasma sintering technique is used for the fabrication of dense materials with a fine-grained microstructure. In this process, a powder is placed into a graphite mold and a uniaxial pressure is applied by two graphite punches. A graphite foil is inserted between the punches and the powder and between the mold and the powder to ensure good electrical, physical and thermal contact. One of the major drawbacks during sintering of metal powders is the carburization of the powder in contact with the graphite foils. In this study, a PVD coating of titanium was applied on the graphite foils in contact with the metal powder (pure iron). The results are promising, as the investigations show that the application of a Ti PVD film of 1.5 and 1.1 µm thickness is effective to completely avoid the carburization of iron powder. Carbon diffuses inside the PVD film during sintering. In parallel, iron diffusion was revealed inside the Ti coating of 1.5 µm thickness. On the other hand, a Ti PVD film of 0.5 µm thickness provides a protection against carbon diffusion just on the sides in contact with the mold, proving that the coating thickness represents an important parameter to consider. View Full-Text
Keywords: physical vapor deposition; thin film; spark plasma sintering; powder metallurgy; carbon diffusion physical vapor deposition; thin film; spark plasma sintering; powder metallurgy; carbon diffusion
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MDPI and ACS Style

Ardigo-Besnard, M.-R.; Besnard, A.; Moser, M.; Bussière, F. Development of Ti PVD Films to Limit the Carburization of Metal Powders during SPS Process. Solids 2021, 2, 395-406. https://doi.org/10.3390/solids2040025

AMA Style

Ardigo-Besnard M-R, Besnard A, Moser M, Bussière F. Development of Ti PVD Films to Limit the Carburization of Metal Powders during SPS Process. Solids. 2021; 2(4):395-406. https://doi.org/10.3390/solids2040025

Chicago/Turabian Style

Ardigo-Besnard, Maria-Rosa, Aurélien Besnard, Mathias Moser, and Florian Bussière. 2021. "Development of Ti PVD Films to Limit the Carburization of Metal Powders during SPS Process" Solids 2, no. 4: 395-406. https://doi.org/10.3390/solids2040025

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