Development of Ti PVD Films to Limit the Carburization of Metal Powders during SPS Process
| Autor: | Maria-Rosa Ardigo-Besnard, Aurélien Besnard, Mathias Moser, Florian Bussière |
|---|---|
| Přispěvatelé: | Laboratoire Interdisciplinaire Carnot de Bourgogne [Dijon] (LICB), Université de Bourgogne (UB)-Université de Technologie de Belfort-Montbeliard (UTBM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Bourguignon des Matériaux et Procédés (LABOMAP), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
matière Condensée: Science des matériaux [Physique]
010302 applied physics Matériaux [Sciences de l'ingénieur] physical vapor deposition thin film spark plasma sintering powder metallurgy carbon diffusion Génie des procédés [Sciences de l'ingénieur] 02 engineering and technology [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 01 natural sciences [SPI.MAT]Engineering Sciences [physics]/Materials Chemistry Matériaux [Chimie] 0103 physical sciences [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering 0210 nano-technology QD1-999 |
| Zdroj: | Solids Solids, MDPI, 2021, 2 (4), pp.395-406. ⟨10.3390/solids2040025⟩ Solids; Volume 2; Issue 4; Pages: 395-406 Solids, Vol 2, Iss 25, Pp 395-406 (2021) |
| ISSN: | 2673-6497 |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
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