SiC/YAG composite coatings by a novel liquid fuelled high velocity oxy-fuel suspension thermal spray

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”) capable radially protecting flame from environmental oxygen by inert gas shrouding. The was used deposit SiC/YAG composite coatings with 85 wt% SiC content, their wear evaluated. An deficient environment provided HVOLF flame, ensuring that no or minimal (<2 wt%) SiO2 formed coating during spray, as confirmed XRD. A good observed at low load below 20 N, specific rate < 5 × 10−5 mm3/Nm, onset mechanisms characteristic ceramic brittle regime between 30 N. future applicability range oxidation- heat-sensitive materials composites offers opportunity be explored solution precursor-based spray.