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A Method to Determine the Electrical Resistance of a Metallic Powder Mass under Compression

 

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Opened Access A Method to Determine the Electrical Resistance of a Metallic Powder Mass under Compression
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Author: Montes Martos, Juan Manuel
Gómez Cuevas, Francisco de Paula
Ternero Fernández, Fátima
Astacio López, Raquel
Sánchez Caballero, Eduardo
Cintas Físico, Jesús
Department: Universidad de Sevilla. Departamento de Ingeniería y Ciencia de los Materiales y del Transporte
Date: 2017-11-06
Published in: Metals, 7 (11), 1-9.
Document type: Article
Abstract: In this paper, a phenomenological model to predict the value of the electrical resistance of a compressed metal powder mass is proposed. The model, based on the experimental compressibility and resistivity-porosity curves, is useful in the field of the electrical resistance consolidation. In this area is often required to find out whether a certain mass of powder inside a die of specified inner section, and subjected to a certain compression, reaches a sufficiently small resistance value so that it can be consolidated by electrical means. The model also predicts the electrical resistance value of the powder mass in case of powders with no oxide layers, or after removing them mechanically or electrically by a previous activation process. The model predictions have been successfully validated through direct measurements of electrical resistance in powder aggregates both in as-received state and after electrical activation.
Cite: Montes Martos, J.M., Gómez Cuevas, F.d.P., Ternero Fernández, F., Astacio López, R., Sánchez Caballero, E. y Cintas Físico, J. (2017). A Method to Determine the Electrical Resistance of a Metallic Powder Mass under Compression. Metals, 7 (11), 1-9.
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URI: https://hdl.handle.net/11441/70501

DOI: 10.3390/met7110479

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