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Microstructure and elevated-temperature erosion-oxidation behaviour of aluminized 9Cr-1Mo Steel

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dc.affiliation.dptoUC3M. Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Químicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Tecnología de Polvoses
dc.contributor.authorHuttunen, E.
dc.contributor.authorHonkanen, M.
dc.contributor.authorTsipas, Sophia Alexandra
dc.contributor.authorOmar, H.
dc.contributor.authorTsipas, D.
dc.date.accessioned2015-04-09T11:10:41Z
dc.date.available2015-04-09T11:10:41Z
dc.date.issued2012-10
dc.description.abstractDegradation of materials by a combination of erosive wear and atmospheric oxidation at elevated temperatures constitutes a problem in some power generation processes, such as fluidized-bed combustion. In this work, 9Cr-1Mo steel, a common tube material in combustion chambers, is coated by a pack cementation method from an Al-containing pack in order to improve the resistance to erosion-oxidation at elevated temperatures. The resulting coating is studied in terms of microstructure and microhardness and tested for its resistance against impacts by sand particles in air at temperatures of 550-700 degrees C under several conditions, with thickness changes and appearance of the exposed surfaces being studied. The coating was found to contain several phases and layers, the outermost of which was essentially Al-rich and contained e. g., small AlN precipitates. The microhardness values for such coating ranged from 950 to 1100 HV20g. The coating provided the substrate with increased protection particularly against normal particle impacts, as manifested by smaller thickness losses for coated specimens as compared to uncoated counterparts. However, much of the coating was lost under all test conditions, despite the fact that particle debris formed a homogeneous layer on the surface. These results are described and discussed in this paper.en
dc.description.sponsorshipE.H.-S. is grateful to the Academy of Finland for research funding (decisions 111948, 106160 and 218296). The European Commission is also acknowledged for funding of a research training network (contract HPRN-CT-2001-00201).en
dc.description.statusPublicadoes
dc.format.extent11
dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationApplied Surface Science (2012). 259, 674-684.en
dc.identifier.doi10.1016/j.apsusc.2012.07.096
dc.identifier.issn0169-4332
dc.identifier.publicationfirstpage674
dc.identifier.publicationlastpage684
dc.identifier.publicationtitleApplied Surface Scienceen
dc.identifier.publicationvolume259
dc.identifier.urihttps://hdl.handle.net/10016/20399
dc.identifier.uxxiAR/0000011335
dc.language.isoeng
dc.publisherElsevier
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.apsusc.2012.07.096
dc.rights© 2012 Elsevier B.Ven
dc.rights.accessRightsopen accessen
dc.subject.ecienciaMaterialeses
dc.subject.otherCoatingen
dc.subject.otherSteelen
dc.subject.otherPack cementationen
dc.subject.otherErosion-oxidationen
dc.subject.otherMicrohardnessen
dc.titleMicrostructure and elevated-temperature erosion-oxidation behaviour of aluminized 9Cr-1Mo Steelen
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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