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

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.