Process maps for plasma spray. Part II: Deposition and properties

摘要: This is the second paper of a two part series based on an integrated study carried out at State University New York Stony Brook and Sandia National Laboratories. The goal fundamental understanding plasma-particle interaction, droplet/substrate deposit formation dynamics microstructure development as well property. outcome science-based relationships, which can be used to link processing performance. Molybdenum splats coatings produced 3 plasma conditions three substrate temperatures were characterized. It was found that there strong mechanical/thermal interaction between droplet substrate, builds up coatings/substrate adhesion. Hardness, thermal conductivity, modulus increase, while oxygen content porosity decrease with increasing particle velocity. Increasing deposition temperature resulted in dramatic improvement coating conductivity hardness increase content. Indentation reveals improved fracture resistance for prepared higher temperature. Residual stress significantly affected by temperature, although not significant energy within investigated parameter range. Coatings high high-energy particles suffered considerably less damage wear tests. Possible mechanisms behind these changes are discussed context relational maps under development.