Fly Ash/Rare Earth Oxide Coatings by EPD: Processing and Characterization

Ana Arizmendi-Morquecho; Alejandra Chávez-Valdez; Josué Aguilar; Jaime Álvarez

doi:10.4028/www.scientific.net/KEM.507.197

Paper Titles

EPD of Reverse Micelle Pd and Pt Nanoparticles onto InP and GaN for High-Response Hydrogen Sensors
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Electrophoretic Deposition of Polyaryletheretherketone (PEEK) from a Matching Density Solvent Mixture
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Examples of EPD Process Applications in the Electronic Industry and their Characteristics
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Mechanical and Tribological Properties of Al₂O₃-ZrO₂ Based Composites Prepared by EPD
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Fly Ash/Rare Earth Oxide Coatings by EPD: Processing and Characterization
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Stability and EPD of Concentrated Suspensions of Alumina with Nanosized Titania
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Control of Electrophoretic Deposition Kinetics for Preparation of Laminated Alumina/Zirconia Ceramic Composites
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Preparation of Perovskite-Type Oxide Thick-Film Device by EPD Method and its Application for Electrochemical Hydrogen-Phosphate Ion Sensor
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Development of Internal Stresses in Alumina-Zirconia Laminates
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 507Fly Ash/Rare Earth Oxide Coatings by EPD:...

Fly Ash/Rare Earth Oxide Coatings by EPD: Processing and Characterization

Abstract:

Novel materials that can be used as thermal barrier coatings in high temperature applications were obtained by homogenization, mechanical milling and thermal treatment. Samarium oxide was investigated as an alternative to react with the free silica from fly ash and to form new silicate compounds. The main phases found in fly ash-Sm₂O₃ mixtures were mullite and samarium silicate Sm_4.66O(SiO₄)₃. Electrophoretically deposited coatings from these materials were obtained at 50 V and 3 minutes deposition time. The surface microstructure of the coatings was characterized by scanning electron microscopy (SEM-EDXS). The coatings were homogeneous and showed no crack formation. Additionally, thermal conductivity of the bulk samples at room temperature was determined. The thermal conductivity values of the new materials were below 1 W/mK which makes them suitable for thermal and environmental barrier applications.

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Key Engineering Materials (Volume 507)

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197-202

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.507.197

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Online since:

March 2012

Authors:

Ana Arizmendi-Morquecho, Alejandra Chávez-Valdez, Josué Aguilar, Jaime Álvarez

Keywords:

EPD, Fly Ash (FA), Samarium Oxide, Thermal Barrier Coating (TBC)

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