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Sintering behaviour of Suspension Plasma Sprayed Thermal Barrier Coatings
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing.
2019 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Thermal barrier coatings are introduced for increasing durability of metallic components used in hot section of gas turbine engines. Current requirement of the gas turbine engine is to improve the fuel economy with superior efficiency has led to a continuous increase in gas inlet temperature. However, above 1200°C YSZ had issues like poor phase stability, high sintering rates etc. which affects the TBC life. Reason behind the using SPS process has modified property than APS i.e. ability of generating columnar microstructure. At high temperature sintering changes in TC layer may lead to reduction on porosity results change in mechanical properties and thermal properties.

This work presents sintering behaviour of suspension plasma sprayed single layered (8YSZ) TBC and multi-layered (GZ/8YSZ, 48YSZ/8YSZ, YAG/8YSZ) TBC´s at high the temperature, the influence of the substrate and changes in composition on sintering. Free standing TBC´s has positive effect on sintering as compared to TBC´s with the substrates.

Place, publisher, year, edition, pages
2019. , p. 22
Keywords [en]
Thermal barrier coating, sintering, plasma spray, substrates
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
URN: urn:nbn:se:hv:diva-14694Local ID: EXP800OAI: oai:DiVA.org:hv-14694DiVA, id: diva2:1369572
Subject / course
Mechanical engineering
Educational program
Produktionsteknik, magister
Supervisors
Examiners
Available from: 2019-11-18 Created: 2019-11-12 Last updated: 2019-11-18Bibliographically approved

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