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Título: | Creep behavior of TiCxN1-x-CoTi cermets synthesized by mechanically induced self-sustaining reaction |
Autor: | Morales-Rodríguez, A.; Gallardo-López, Ángela; Domínguez Rodríguez, Arturo; Córdoba, J.M. CSIC ORCID ; Avilés Escaño, Miguel Ángel CSIC ORCID; Gotor, F.J. CSIC ORCID | Fecha de publicación: | 2011 | Editor: | Elsevier | Citación: | Journal of the European Ceramic Society 31: 299- 302 (2011) | Resumen: | The plastic flow of TiCxN1-x-CoTi cermets has been investigated by uniaxial compression tests carried out in argon atmosphere at temperatures between 1100 and 1200°C. Two different cermets, with 5wt.% W or WC content as sintering additives, have been explored to assess the influence of the sintering additives on creep. The microstructural observations of deformed samples and the mechanical results indicate that the hard phase (ceramic grains) controls the plastic deformation. The stress exponent changes from 1 to 2 with increasing strain rate, suggesting a transition in the deformation mechanism from diffusional creep to grain boundary sliding; both with similar activation energy values of about 400kJ/mol. This value of activation energy agrees with C diffusion in the carbonitride grains as the strain rate controlling mechanism. © 2010 Elsevier Ltd. | URI: | http://hdl.handle.net/10261/59313 | DOI: | 10.1016/j.jeurceramsoc.2010.10.007 | Identificadores: | doi: 10.1016/j.jeurceramsoc.2010.10.007 issn: 0955-2219 |
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