Solution precursor plasma spray SPPS

Solution-Precursor Plasma Spray (SPPS) process... 

Recently, some innovative plasma-spray techniques have been employed to produce TBCs with lower thermal conductivities and more durable performance. The solution precursor plasma spray (SPPS) has been exploited to deposit TBCs, in which an aqueous chemical precursor feedstock, rather than YSZ powders, is injected into plasma jet [25,26]. The lack of large-scale splat boundaries effectively toughens the TBCs, making SPPS TBCs highly durable relative to APS TBCs. 

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