Simultaneous Spark Plasma Sintering of Multiple Complex Shapes

This work addresses the two great challenges of the spark plasma sintering (SPS) process: The sintering of complex shapes and the simultaneous production of multiple parts. A new controllable interface method is employed to concurrently consolidate two nickel gear shapes by SPS. A graphite deformabl...

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Detalles Bibliográficos
Autores principales: Manière, Charles, Torresani, Elisa, Olevsky, Eugene A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6416649/
https://www.ncbi.nlm.nih.gov/pubmed/30781753
http://dx.doi.org/10.3390/ma12040557
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author Manière, Charles
Torresani, Elisa
Olevsky, Eugene A.
author_facet Manière, Charles
Torresani, Elisa
Olevsky, Eugene A.
author_sort Manière, Charles
collection PubMed
description This work addresses the two great challenges of the spark plasma sintering (SPS) process: The sintering of complex shapes and the simultaneous production of multiple parts. A new controllable interface method is employed to concurrently consolidate two nickel gear shapes by SPS. A graphite deformable sub-mold is specifically designed for the mutual densification of both complex parts in a unique 40 mm powder deformation space. An energy efficient SPS configuration is developed to allow the sintering of a large-scale powder assembly under electric current lower than 900 A. The stability of the developed process is studied by electro-thermal-mechanical (ETM) simulation. The ETM simulation reveals that homogeneous densification conditions can be attained by inserting an alumina powder at the sample/punches interfaces, enabling the energy efficient heating and the thermal confinement of the nickel powder. Finally, the feasibility of the fabrication of the two near net shape gears with a very homogeneous microstructure is demonstrated.
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spelling pubmed-64166492019-03-29 Simultaneous Spark Plasma Sintering of Multiple Complex Shapes Manière, Charles Torresani, Elisa Olevsky, Eugene A. Materials (Basel) Article This work addresses the two great challenges of the spark plasma sintering (SPS) process: The sintering of complex shapes and the simultaneous production of multiple parts. A new controllable interface method is employed to concurrently consolidate two nickel gear shapes by SPS. A graphite deformable sub-mold is specifically designed for the mutual densification of both complex parts in a unique 40 mm powder deformation space. An energy efficient SPS configuration is developed to allow the sintering of a large-scale powder assembly under electric current lower than 900 A. The stability of the developed process is studied by electro-thermal-mechanical (ETM) simulation. The ETM simulation reveals that homogeneous densification conditions can be attained by inserting an alumina powder at the sample/punches interfaces, enabling the energy efficient heating and the thermal confinement of the nickel powder. Finally, the feasibility of the fabrication of the two near net shape gears with a very homogeneous microstructure is demonstrated. MDPI 2019-02-13 /pmc/articles/PMC6416649/ /pubmed/30781753 http://dx.doi.org/10.3390/ma12040557 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Manière, Charles
Torresani, Elisa
Olevsky, Eugene A.
Simultaneous Spark Plasma Sintering of Multiple Complex Shapes
title Simultaneous Spark Plasma Sintering of Multiple Complex Shapes
title_full Simultaneous Spark Plasma Sintering of Multiple Complex Shapes
title_fullStr Simultaneous Spark Plasma Sintering of Multiple Complex Shapes
title_full_unstemmed Simultaneous Spark Plasma Sintering of Multiple Complex Shapes
title_short Simultaneous Spark Plasma Sintering of Multiple Complex Shapes
title_sort simultaneous spark plasma sintering of multiple complex shapes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6416649/
https://www.ncbi.nlm.nih.gov/pubmed/30781753
http://dx.doi.org/10.3390/ma12040557
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