Preparation and characterization of nanostructured Lu2Si2O7 feedstocks for plasma-sprayed environmental barrier coatings

Abstract

High-performance plasma-sprayed feedstocks are crucial in the fabrication of high-performance coatings. Thus far, rare-earth silicates have attracted considerable attention. As far as we know, nanostructured Lu2Si2O7 feedstocks for plasma-sprayed environmental barrier coatings (EBCs) were prepared via nanopowder reconstruction herein for the first time. The microstructure of the Lu2Si2O7 feedstocks was investigated comprehensively and their physical properties were characterized. The results show that the grain size of the spherical Lu2Si2O7 feedstocks with a single phase is approximately 65 nm, with the median particle size being 43.69 μm. The apparent density and tap density of the feedstocks are 1.72 and 2.04 g/cm3, respectively. The as-prepared nanostructured Lu2Si2O7 feedstocks are believed to be promising for advanced EBCs in the future.