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Skräddad mikrostruktur av gadolinium zirkonat baserade värmebarriärbeläggningar som utsätts för termisk cyklisk utmattning
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing.
2017 (Swedish)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesisAlternative title
Tailored microstructure of Gadolinium Zirconate based thermal barrier coatings subjected to thermal cyclic fatigue (English)
Abstract [en]

Yttria Stabilized Zirconia (YSZ) is the standard ceramic top coat material used for TBC application. Above 1200°C, issues such as CMAS (Calcium Magnesium Alumino Silicates) infiltration susceptibility, phase instability and high sintering rates limits its long durability. Therefore, new materials which can overcome these challenges without compromising the other requirements for TBCs are highly desirable. Gadolinium zirconate is one such material which has shown promising results for CMAS infiltration resistance. In this work, a relatively new TBC processing route, suspension plasma spray (SPS) has been employed to deposit gadolinium zirconate based TBCs. The primary aim of this study was to deposit two different coating systems (layered and composite) of gadolinium zirconate and YSZ composition using SPS technique and evaluate their thermal cyclic fatigue life performance. The layered system was a triple layered TBC with YSZ as the base layer, relatively porous GZ as the intermediate layer and dense GZ as the top layer. The blended TBC system comprised of a thin YSZ layer, an intermediate GZ+YSZ thick layer and dense GZ top layer. In the thermal cyclic fatigue test at 1100°C and 1200°C, it was observed that blended TBC had a lower thermal cyclic life than the layered TBC. It was shown that SPS is a promising technique to deposit columnar microstructure TBCs. 

Place, publisher, year, edition, pages
2017. , 12 p.
Keyword [en]
Suspension Plasma Spray, Gadolinium Zirconate, Thermal cyclic fatigue
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
URN: urn:nbn:se:hv:diva-11678Local ID: EXP800OAI: oai:DiVA.org:hv-11678DiVA: diva2:1145476
Subject / course
Mechanical engineering
Educational program
Produktionsteknik
Supervisors
Examiners
Available from: 2017-10-06 Created: 2017-09-29 Last updated: 2017-10-07Bibliographically approved

Open Access in DiVA

fulltext(2002 kB)4 downloads
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File name FULLTEXT01.pdfFile size 2002 kBChecksum SHA-512
2b1a7b7eebbf9a80f9094b9f6cdfb79c5e2fc37de0c9c7ebb8274b778d56368264e21154d4f2e4dd70fecc0512a05731aae31f31b2b2d649291aea504ad3a5b9
Type fulltextMimetype application/pdf

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Production Engineering, Human Work Science and Ergonomics

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
  • html
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  • asciidoc
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