DENSE AND HOMOGENEOUS CERAMIC MATERIAL CONSISTING OF CARBON/SILICON NITRIDE NANOTUBES, PRODUCTION METHOD AND APPLICATIONS THEREOF

摘要

The invention relates to a composite silicon nitride ceramic material consisting of a dense silicon nitride matrix without pores and with non-degraded carbon nanotubes (CNTs) uniformly dispersed inside the matrix. The invention also relates to a method for producing said composite materials by the dispersion of the carbon nanotubes in the silicon nitride matrix and the subsequent spark plasma sintering thereof in a vacuum. Said materials can be used to produce tools, devices or any type of element requiring a good thermomechanical and tribological behaviour, for example, cutting tools or anti-wear components, for example, valves, ball bearings and flanges.