Production of coatings by high velocity oxy-fuel (HVOF) flame jet processing of liquid precursor droplets can be an attractive alternative method to plasma processing. This article concerns modeling of the thermophysical processes in liquid ceramic precursor droplets injected into an HVOF flame jet. The model consists of several sub-models that include aerodynamic droplet break-up, heat and mas...

Hydroxyapatite (HA)ynano-zirconia composite coatings were successfully produced through high velocity oxy-fuel (HVOF) spraying of radio frequency (RF) plasma synthesized powders. Microstructure characterization and morphology analysis on the nano-structured coatings were conducted using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometry (XRD), and d...

The surface modification processes such as hard facing, case carburizing, thermal spraying, ion nitriding, tough nitriding, and others, are some of the important techniques being adopted for providing enhanced life for parts and components, in service. Among them, plasma spray and High Velocity Oxy Fuel (HVOF) spray coatings are popular and widely used. In this investigation, plasma & High Velo...

In this study, the newly designed bipolar plate for proton exchange membrane fuel cells (PEMFC) was produced by spray-coating the Ni65Cr15P16B4 metallic glassy alloy on Al plate. The Ni65Cr15P16B4 metallic glass was adopted as a coating material because of its excellent corrosion resistance and the high velocity oxy-fuel (HVOF) spray coating was used for the metallic glass deposition on the Al ...

Despite recent advances in suspension-based thermal spray techniques, there is still a need to widen the capability of available setups handle suspension explore new compositions and improve properties performance existing ones. In this work, novel setup for injecting liquid-based feedstock liquid-fuelled high velocity oxy-fuel (HVOLF) torch proposed, involving hardware (“Hybrid Nozzle”) capabl...

• Oxy-fuel combustion is a simple method for CO 2 capture. The emissions are negative if captured from of -neutral biomass. To change CFB boiler to oxy-fuel, heat must be moved furnace backpass. Oxy-combustion by flue-gas recirculation capture applied an existing, already -neutral, biomass-fired circulating fluidized bed (CFB) boiler, thus resulting in emissions. required oxygen concentration d...