Relation between Synthesis Process, Microstructure and Corrosion Resistance of Two Yttrium Silicates

Emilie Courcot; Francis Rebillat; Caroline Louchet-Pouillerie

doi:10.4028/www.scientific.net/MSF.595-598.923

Paper Titles

High Resolution MicroRaman Study of Blisters in Cr₂O₃ Thermal Oxide Films
p.889

Yttrium Implantation and Manganese Addition Element Effects on the High Temperature Oxidation Resistance of a Model Steel
p.897

Comments on the Quantification of Mechanical Adhesion Energy of Thermal Oxide Scale on Metallic Substrate Using Tensile Test
p.907

Thermal Alumina Scales on FeCrAl: Characterization and Growth Mechanism
p.915

Relation between Synthesis Process, Microstructure and Corrosion Resistance of Two Yttrium Silicates
p.923

The Effects of Reactive Element Oxide Coatings on the High Temperature Oxidation of FeCrAl Alloy
p.933

Thermal Fatigue of Anticorrosive Coatings and Multilayer Coatings: A Performance Index Approach
p.941

Influence of Interstitials Content on the Sensitivity of Alloy 718 to Oxidation Assisted Intergranular Fracture
p.951

Oxidation Behavior of Mo Containing Alloys
p.959

HomeMaterials Science ForumMaterials Science Forum Vols. 595-598Relation between Synthesis Process, Microstructure...

Relation between Synthesis Process, Microstructure and Corrosion Resistance of Two Yttrium Silicates

Abstract:

Silicon-based ceramics are among the main candidates for high temperature structural components in aeronautic applications. One key drawback of silicon-based ceramics for these applications is the volatilization of the protective silica scale, in moisture and the resulting ceramic recession. Therefore, the further use of these ceramics components depends on the development of external protection against water vapour attack. Some of the most promising materials seem to be rare earth silicates. Based on much richer data in the bibliography, the purpose of this work is to investigate the influence of two yttrium silicates elaboration processes on both the capability to crystallize and the corrosion resistance in an oxidative moist atmosphere at high temperature. Taking into account the material’s morphology, composition and degree of crystallization, the composition (Y2SiO5 or Y2Si2O7) and the preferable synthesis process are discussed.