首页|High Temperature Mechanical Properties of Ti(C,N)-Co-Mo_2C Cermets
High Temperature Mechanical Properties of Ti(C,N)-Co-Mo_2C Cermets
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The creep behavior of a TiC_xN_(1-x)-Co-Mo2C cermet has been investigated at temperatures between 1100-1200℃ in an inert atmosphere to assess the one step mechanically induced self-sustaining reaction synthesis and pressureless sintering process, and the influence of the Mo_2C additive in the high temperature mechanical properties of this cermet. The samples deform plastically at the chosen temperatures, and values of the stress exponent (n=1.7±0.6) and activation energy (Q=4.3±0.5 eV) have been estimated from uniaxiai compression tests. No significant grain growth has been detected after deformation. The reproducibility of the creep tests compared to other compositions indicates that the Mo_2C addition contributes to increase notably the resistance to high temperature oxidation of the samples, so that the plastic behavior is not affected by oxidation when deformation experiments are performed in an inert atmosphere.
cermetscarbonitridespressureless sinteringhigh temperature mechanical propertiescreep
A. Gallardo-Lopez、A. Morales-Rodriguez、A. Dominguez-Rodriguez、J. M. Cordoba、M. A. Aviles、F. J. Gotor
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Departamento de Fisica de la Materia Condensada, Universidad de Sevilla-CSIC, Apdo. 1065, 41080 Sevilla, Spain
lnstituto de Ciencia de Materiales de Sevilla, CSIC-USE, Avda. Americo Vespucio 49, 41092 Sevilla, Spain
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NSTL
Trans Tech Publications Ltd
