APPLICATION METHOD OF THERMAL-PROTECTIVE NANOSTRUCTURED COATING WITH PLASMA SPUTTERING OF POWDER

摘要

FIELD: machine building.SUBSTANCE: maintenance of dynamic vacuum in a chamber for coating application is performed and alternating sputtering of the coating layer with porosity of 0.1-0.2% is performed; it consists of fine particles and nanoparticles of the powder using an under-expanded plasma jet at maintaining the chamber dynamic vacuum with the pressure that is lower than static pressure in the plasma jet with sputtered powder at the chamber inlet, and then, sputtering of the coating layers is performed with porosity of 3.5-5.0%; it consists of plasticised powder particles using an over-expanded plasma jet at maintaining in the chamber of dynamic vacuum with the pressure that is higher than static pressure in the plasma jet with the sputtered powder at the chamber inlet. Alternating sputtering is performed till the required coating is obtained.EFFECT: nanostructured thermal-protective coating with decreased stresses and increased resistance to action of thermocyclic loads.7 dwg, 2 ex