Modification of the surface of silicon carbide parts by laser treatment for improving their tribological properties

Abstract

Laser microstructuring of the surface can be used for improving tribological properties of materials. Thistrend suggests a laser treatment to create on the materials surface microstructures with spatial selectivity ofphysical-mechanical properties, such as microhardness, friction factor, etc. The microstructuring of the externalsurface of gas-dynamic compactions is perspective. To increase the capacity of the practical use of it is expedientto enhanced functionality through the use of laser microstructuring of the more common laser systems with pulsedurations in the millisecond range. A method of surfaces modification of silicon carbide details by lasertreatment for improving their tribological properties has been developed. A material structure in the heat-affectedzone after laser microstructuring has been studied. Evaluated the morphological changes of the treated surfaceafter a repetitively pulsed laser exposure. It was established that the pulse-periodic laser exposure leads to theformation on the polished surface of the silicon carbide parts recesses are round to oval. Along with theformation of acyclic microrelief occurs modifying surface structure details. Under laser exposure on the surfaceof the ceramic material is a decomposition of silicon carbide and graphite to form a solid solution of carbon insilicon. Supposed to carry out the study of the tribological properties of the resulting structures.