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Meeting MS&T23: Materials Science & Technology
Symposium Advanced Coatings for Wear and Corrosion Protection
Presentation Title Benefits of Yttria-doping in Ytterbium Disilicate Environmental Barrier Coatings
Author(s) Dawson Smith, Vincent Mika, Molly O'Connor, Robert Golden, Rodney Trice, Michael S. Titus
On-Site Speaker (Planned) Michael S. Titus
Abstract Scope Ytterbium disilicate (YbDS) and yttria-doped ytterbium disilicate environmental barrier coatings protect ceramic matrix composite components in gas turbine engines from corrosive atmospheres. When deposited by atmospheric plasma spray, the coatings are partially amorphous, metastable, and exhibit numerous cracks. Thus, the coatings require a pre-service heat treatment to crystallize and, ideally, heal pre-existing cracks. In this study we determine the phase transformation kinetics, temperatures, and volumetric changes using a combination of differential scanning calorimetry and dilatometry. These results suggest multiple phase transformations occur during simulated heat treatments, and we validated these transformations using correlative Raman and scanning electron microscopy. Experimentally measured thermo-physical properties were integrated into a finite element model to predict the Stress evolution in the coating during heat treatments. In this work, we will present new heat treatments that reduce processing time while adequately healing pre-existing cracks, and we will elucidate the beneficial role of Y-doping in YbDS coatings.


Benefits of Yttria-doping in Ytterbium Disilicate Environmental Barrier Coatings
Ceramic Coating as a Diffusion Barrier to Prevent Saddle Marks in Continuous Homogenization of Aluminum 6000 Series
Corrosion-Resistant Coatings for Storage Canister
Development and Wear Behaviour of Compositional Gradient and Multi-layered Ni-W Alloy Coatings
Effect of Micro-arc Oxidation Voltage on the Morphology and Electrochemical Properties of AZ31B Magnesium Alloy
Effect of Sustainable Silica-rich Graphene Analogues to Achieve High-Performance Corrosion Resistance Coating for Carbon Steel
Effects of BN Content on the Microstructure and Mechanical Properties of Cr3C2–NiCr-BN Composite Coatings Prepared by a Novel Ethanol-fueled HVOF Process
Highly Robust CeO2/C3N4-modified NiP Electroless-plated Coatings
Improvement of Cutting Performance of Titanium Based Vacuum Brazed Diamond Tools Excursively Coating via Physical Vapor Deposition
J-1: Development of Fusion Bonded Epoxy Coatings on Steel Components for the Improved UV and Corrosion Resistance Performance
J-2: Obtaining Protective Coatings TiAl, TiSi under Conditions of Synthesis of Complex Functionally Active Charges
Novel Thermal Barrier Coatings Stable up to 1700C
Structural Integrity Assessment of Cold Spray Repaired High-Strength Aluminium Alloy 7075 Specimens
Surface Preparation and Process Optimization on Thin Film Coating to Reduce Wafer Warpage for Advanced Packaging Applications in Semiconductor Industry
Sustainable Development of Spray Parameters for Thermal Spray
The dDevelopment of Resistance Seam Cladding for Corrosion Resistant Liners in Linepipe
The Importance of Controlling UV Coating Temperature to Stabilize Viscosity during Application to Reduce Energy Consumption
Tribological and Anti-scaling Performance of Graphene-enriched Thin Polymer Coatings
ZnO-doped C3N4 Nanocapsules-modified NiP Metallic Coating

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