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High temperature oxidation resistance of (Ti,Ta)(C,N)-based cermets


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Opened Access High temperature oxidation resistance of (Ti,Ta)(C,N)-based cermets

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Author: Chicardi Augusto, Ernesto
Gotor Martínez, Francisco José
Córdoba Gallego, José Manuel
Department: Universidad de Sevilla. Departamento de Ingeniería y Ciencias de los Materiales y del transporte
Date: 2016
Published in: Corrosion Science, 102, 126-136.
Document type: Article
Abstract: Cermets based on titanium–tantalum carbonitride were oxidized in static air between 800 °C and 1100 °C for 48 h. The thermogravimetric and microstructural study showed an outstanding reduction in the oxidation of more than 90% when the Ta content was increased. In cermets with low Ta content, the formation of a thin CoO/Co3O4 outer layer tends to disappear by reacting with the underlying rutile phase, which emerges at the surface. However, in cermets with higher Ta content, the formation of an external titanate layer, observed even at a low temperature, appears to prevent the oxygen diffusion and the oxidation progression
Cite: Chicardi Augusto, E., Gotor Martínez, F.J. y Córdoba Gallego, J.M. (2016). High temperature oxidation resistance of (Ti,Ta)(C,N)-based cermets. Corrosion Science, 102, 126-136.
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DOI: 10.1016/j.corsci.2015.10.001

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