CERAMIC NANO-COATINGS ON SPHERICAL POWDERS: ALTERNATIVE METHOD FOR OBTAINING POROUS POWDER MATERIALS

Abstract

A technology has been developed to obtain porous powder materials on the basis of spherecal powder particles of 12Х18Н10T сorrosion-resistant steel by technological coating deposition on them –condensate from layered and composite Si and (Si + C) or Si and (Mo + Si) nano-layers. Their deformation at points of spherical particles contact creates press forming conditions with sufficient strength rate at pressure below yield point of steel powder (below 200 MPa). The subsequent sintering occurring  with an exothermic reaction in the coating ensures particle sintering in their local heating within 1100–1200 °С temperature range