Abstract No.:	2790
Title:	Synthesis of Y2SiO5 powder by solid liquid sintering and coating produced by plasma spray technique on the SiC substrate
Authors:	Salih Emre Yildirim / Sakarya University, Metlallurgy and Material Engineering, TURKEY Nil Toplan/ Sakarya University, Metallurgy and Material Engineering, TURKEY Fatih Üstel/ Sakarya University, Metallurgy and Material Engineering, TURKEY
Abstract:	Plasma sprayed Y2SiO5 (yttrium monosilicate) coatings is applied environmental/thermal barrier applications (ETBC) due to benefical physical chemical, mechanical and thermal properties (excellent high-temperature stability, low youngs modulus, low thermal expansion coefficient, low evaporation rate and oxygen permeability, good erosion resistance) on Si based (SiC, Si3N4) and ceramic matrix composite substrates (SiC/SiC, SiC-C/C). In this study, firstly Y2SiO5 powder was synthesized to utilizing a solidliquid phase sintering method with LiYO2 as an additive. In the next stage, the produced Y2SiO5 powder was deposited on SiC substrates by plasma spray technique. Finally, the produced Y2SiO5 powder and deposited Y2SiO5 layer was characterized with optical microscope, XRD, SEM and EDS analyses. Keywords: Y2SiO5 powder, thermalenvironmental barrier coatings, plasma spray technology

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