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Title: Current Thoughts on Reactive Element Effects in Alumina-Forming Systems: In Memory of John Stringer

Journal Article · · Oxidation of Metals
 [1];  [2];  [1]
  1. Julich Research Centre (Germany)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

In memory of John Stringer (1934–2014), one of the leaders in studying the reactive element (RE) effects, this paper reviews the current status of understanding of the effect of RE dopants on high-temperature oxidation behavior, with an emphasis on recent research related to deploying alumina-forming alloys and coatings with optimal performance in commercial systems. Additionally, to the well-known interaction between indigenous sulfur and RE additions, effects have been observed with C, N, and O found in commercial alloys and coatings. While there are many similarities between alumina-forming alloys and coatings, the latter bring additional complicating factors such as the effects of O incorporation during thermal spraying MCrAlY coatings, coating roughness, and heat treatments that must be considered in optimizing the beneficial dopant addition. We can see analogies between RE effects in alloys and in the substrates beneath diffusion M–Al coatings. Recently, there has been more interest in the influence of mixed oxidant environments, since these may modify the manifestation of the RE effect. Some thoughts are provided on optimizing the RE benefit and modeling oxidation of RE-doped alloys.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office
Grant/Contract Number:
AC05-00OR22725; NA 615-2
OSTI ID:
1279402
Journal Information:
Oxidation of Metals, Vol. 86, Issue 1-2; ISSN 0030-770X
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 149 works
Citation information provided by
Web of Science

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The Effect of HVOF Bond Coating with APS Flash Coating on TBC Performance journal February 2019
Oxide-Scale Evolution on a New Ni–Fe-Based Superalloy at High Temperature journal April 2019
Interplay of water and reactive elements in oxidation of alumina-forming alloys journal June 2018
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