MODIFICATION OF THE STRUCTURE AND MECHANICAL PROPERTIES OF OXIDE CERAMICS BY ION TREATMENT

The results of the study of the effect of ion (argon, carbon, nitrogen, xenon) treatment at various beam parameters (ion energy, current density, energy density, fluence, irradiation modes) on the physical and mechanical properties (structure, phase composition, microhardness) of ceramics based on partially stabilized zirconia and alumina are presented. The regularities of structural and phase transformations, the effects of surface modification of zirconia and alumina ceramics when exposed to accelerated ions are established. X-ray phase analysis showed that ion (argon, nitrogen, xenon) treatment, regardless of the mode (continuous, pulsed) in the surface layer of ceramics based on partially stabilized zirconia, leads to phase rearrangement at a depth of about 15 μm. According to scanning electron microscopy continuous ion beams (argon, xenon) do not lead to morphological changes in the surface layer of oxide ceramics. The impact of pulsed ion (carbon, nitrogen) beams leads to short-term melting and solidification processes, as a result of which a structure is formed in the surface layer of oxide ceramics which differs from the structure in the volume of ceramics. Regardless of the beam mode and parameters, ion treatment leads to an increase in the microhardness of the ceramic surface from of partially stabilized zirconia and alumina.

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