DEVELOPMENT AND CHARACTERISATION OF THERMAL BARRIER COATINGS ON CONVENTIONAL AND DIRECT METAL LASER SINTERED IN718 SUPERALLOYS

摘要

Thermal spraying has been assumed to be a complicated deposition process that deals with a number ofinterconnected variables / parameters. Variation in these parameters brings about a complete or a partial shift inthe particle properties and thus may cause changes in the microstructure of the deposited coatings. Combinationof coatings with the substrate surface is a matter of concern as the bonding between the two surfaces involvesmechanical, physical and chemical mechanisms. In the present work studies related to the comparison andassessment of mechanical and other related properties of thermal barrier coatings of conventional Inconel 718(IN718) and Direct Metal Laser Sintered (DMLS) IN718 have been carried out. Comparison betweenconventional IN718 and DMLS – IN718 superalloy coatings have revealed interesting results.