Microstructure, Processing, Performance Relationships for High Temperature Coatings

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HVOF coating have shown high resistance to corrosion in fossil energy applications and it is generally accepted that mechanical failure, e.g. cracking or spalling, ultimately will determine coating lifetime. The high velocity oxygen-fuel method (HVOF) of applying coatings is one of the most commercially viable and allows the control of various parameters including powder particle velocity and temperature which influence coating properties, such as residual stress, bond coat strength and microstructure. Methods of assessing the mechanical durability of coatings are being developed in order to explore the relationship between HVOF spraying parameters and the mechanical properties of the coating and ... continued below

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Lillo, Thomas M.; Wright, Richard N.; Swank, W. David; Haggard, D.C; Kunerth, Dennis C. & Clark, Denis E. July 1, 2008.

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HVOF coating have shown high resistance to corrosion in fossil energy applications and it is generally accepted that mechanical failure, e.g. cracking or spalling, ultimately will determine coating lifetime. The high velocity oxygen-fuel method (HVOF) of applying coatings is one of the most commercially viable and allows the control of various parameters including powder particle velocity and temperature which influence coating properties, such as residual stress, bond coat strength and microstructure. Methods of assessing the mechanical durability of coatings are being developed in order to explore the relationship between HVOF spraying parameters and the mechanical properties of the coating and coating bond strength. The room temperature mechanical strength, as well as the resistance of the coating to cracking/spalling during thermal transients, is of considerable importance. Eddy current, acoustic emission and thermal imaging methods are being developed to detect coating failure during thermal cycling tests and room temperature tensile tests. Preliminary results on coating failure of HVOF FeAl coatings on carbon steel, as detected by eddy current measurements during thermal cycling, are presented. The influence of HVOF coating parameters of iron aluminides - applied to more relevant structural steels, like 316 SS and Grade 91 steel, - on coating durability will be explored once reliable methods for identification of coating failure have been developed.

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  • 22nd Annual Conference on Fossil Energy Materials,Pittsburgh, PA,07/07/2008,07/10/2008

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  • Report No.: INL/CON-08-14487
  • Grant Number: DE-AC07-99ID-13727
  • Office of Scientific & Technical Information Report Number: 938445
  • Archival Resource Key: ark:/67531/metadc898732

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 1, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 19, 2016, 3:46 p.m.

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Lillo, Thomas M.; Wright, Richard N.; Swank, W. David; Haggard, D.C; Kunerth, Dennis C. & Clark, Denis E. Microstructure, Processing, Performance Relationships for High Temperature Coatings, article, July 1, 2008; [Idaho Falls, Idaho]. (digital.library.unt.edu/ark:/67531/metadc898732/: accessed November 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.