liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Modeling the Diffusion of Minor Elements in Different MCrAlY-Superalloy Coating/Substrates at High Temperature
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
Beijing Gen Research Institute Min and Met, Peoples R China.
Siemens Ind Turbomachinery AB, Sweden.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
Show others and affiliations
2017 (English)In: ENERGY MATERIALS 2017, SPRINGER INT PUBLISHING AG , 2017, 251-263 p.Conference paper, Published paper (Refereed)
Abstract [en]

As demands of energy supply have been increased continuously and at the same time the uses of fossil fuel are limited and the greenhouse effect should be minimized, the gas turbine industries have been making efforts to increase gas turbine efficiency and to reduce emissions for power generations. One of the efforts is a continuous development of high temperature capacity of ceramic thermal barrier coatings (TBCs) and metallic MCrAlY overlays. The MCrAlY overlays are used as both protective coatings and bond coats to TBCs on underlying superalloy components in the gas turbines. During high temperature exposure, elemental diffusion occurs between the bond coat and the substrate which can affect the overall coating performance. The present study investigates the diffusion of minor elements like Re, Ta, Si, Mo and Ti in various MCrAlY overlays and superalloy substrates. An oxidation-diffusion model has been used to study the elemental diffusion. The diffusion process contains two stages: beta depletion stage and the b depleted stage. In the stage when MCrAlY overlays exhibit gamma + beta microstructure, the diffusion of minor elements in the coatings was observed to be related to the b depletion rate. After that the diffusion of the minor elements did not show any clear dependence on the coating composition. The development principle of the elemental diffusion is discussed in detail.

Place, publisher, year, edition, pages
SPRINGER INT PUBLISHING AG , 2017. 251-263 p.
Series
Minerals Metals & Materials Series, ISSN 2367-1181
Keyword [en]
MCrAlY; Superalloys; Inter-diffusion; Minor elements
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:liu:diva-138496DOI: 10.1007/978-3-319-52333-0_23ISI: 000402563900023ISBN: 978-3-319-52333-0 (electronic)ISBN: 978-3-319-51647-9 (print)OAI: oai:DiVA.org:liu-138496DiVA: diva2:1111630
Conference
2nd Energy Materials Conference
Note

Funding Agencies|Swedish governmental agency for Innovation Systems (VINNOVA)

Available from: 2017-06-19 Created: 2017-06-19 Last updated: 2017-06-19

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Jonnalagadda, Krisha PraveenPeng, Ru
By organisation
Engineering MaterialsFaculty of Science & Engineering
Manufacturing, Surface and Joining Technology

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 12 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf