High-velocity air fuel (HVAF) coating processes have advantages over conventional high-velocity oxygen (HVOF) processes, resulting in coatings with superior properties. The present review first provides a concise overview of HVAF coatings, highlighting their HVOF coatings. Then, the fundamentals solid particle, slurry, and cavitation erosion are briefly introduced. Finally, performance for eros...

High-entropy alloys (HEAs) have great potential to be used as high-temperature materials and in coating material applications due their combination of strength, ductility, thermal stability, wear, oxidation resistance. In this work, a new HEA alloy based on NiCoCrAlSi composition was designed deposited into metallic coatings by high-velocity oxy-fuel (HVOF) air plasma spray (APS) processes, wit...

Several kinds of WC-reinforced coatings were prepared by high-velocity oxygen-fuel spray (HVOF) and electric contact strengthening (ECS), respectively, their corrosion behaviors in 3.5% NaCl solution investigated. The microstructure, element distribution, phase resistance these compared. results showed that, compared with HVOF-sprayed coatings, the ECS-prepared denser lower porosity. Simultaneo...

The major physicochemical processes involved in an industrial HVOF thermal spray process (Diamond Jet hybrid gun, Sulzer Metco, Westbury, NY) are studied by a comprehensive multiscale model. The model includes continuum type differential equations that describe the dynamics of gas phase and particles of different sizes, and a rule-based stochastic simulator that predicts the evolution of coatin...

The microstructure and local mechanical characteristics of thermal spray ferrous coatings have been determined. The emphasis has been on coatings made by the high velocity oxyfuel (HVOF) process, especially the role of Al alloy additives. The oxide phase present in the material and preferred pathways for local cracking and separation have been determined. Thin intersplat oxide layers emerge as ...

The paper reports on studies and results about the implementation of a novel type of Cryogenic Current Comparator (CCC), designed for work at liquid nitrogen temperature. The studies are particularly aimed at the realization of the CCC shield by means of an extended thick film of the YBCO high-temperature superconductor (HTS), deposited onto a metallic substrate with the HVOF technique. Recent ...

Inconel and micro nano WC-12Co powders were deposited on AISI 4140 carbon steel by high-velocity oxy fuel (HVOF) coating followed laser surface modification. Laser power scan speed varied at different levels. Microstructure microhardness investigated. Nanocoatings performed better than microcoatings. Nanostructured WC powder coatings exhibited greater hardness compared to microstructured coatin...