Lu2O3-SiO2-ZrO2 Coatings for Environmental Barrier Application by Solution Precursor Plasma Spraying and Influence of Precursor Chemistry

Study of the microstructural control of Ba(Mg1/3Ta2/3)O3 perovskite thermal barrier coating deposited by solution precursor plasma spray

“…The precursor concentration determines the solute content in each single atomized droplet. Solid particles with various sizes can precipitate from droplets with same size, but different concentrations [27]. As indicated before, the size of solid particles determines the microstructure and deposition rate.…”

“…When the solvent contains organics, its combustion in presence of oxygen releases heat and gases. Thus, the formed solid agglomerated particles are characterized by a loose and porous structure [27]. In this work, the solvent consists in a mixture of ethanol and acetic acid.…”

Hybrid Suspension/Solution Precursor Plasma Spraying of a Complex Ba(Mg1/3Ta2/3)O3 Perovskite: Effects of Processing Parameters and Precursor Chemistry on Phase Formation and Decomposition

“…In SPPS, the complex feedstock preparation process of APS described above (synthesis, agglomeration and sintering of powders) is eliminated, as it occurs in-flight. As-sprayed coatings prepared by SPS or SPPS show characteristic microstructures such as submicron or nanosized pores, segmented cracks and columns (Ref [10][11][12][13], and most of them are proven or foreseen beneficial for the performance of TBCs in comparison to APS-deposited coatings. Still, as most direct current (D.C.) plasma torches use radial feedstock injection, the deposited coatings in SPS and SPPS often contain a large amount of unmolten nanosized particles that result from the overspray (Ref 13).…”