Mechanically reliable surface oxides for high-temperature corrosion resistance

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Corrosion is widely recognized as being important, but an understanding of the underlying phenomena involves factors such as the chemistry and physics of early stages of oxidation, chemistry and bonding at the substrate/oxide interface, role of segregants on the strength of that bond, transport processes through scale, mechanisms of residual stress generation and relief, and fracture behavior at the oxide/substrate interface. Because of this complexity a multilaboratory program has been initiated under the auspices of the DOE Center of Excellence for the Synthesis and Processing of Advanced Materials, with strong interactions and cross-leveraging with DOE Fossil Energy and US industry. ... continued below

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14 p.

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Natesan, K.; Veal, B.W.; Grimsditch, M.; Renusch, D. & Paulikas, A.P. May 1, 1995.

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Description

Corrosion is widely recognized as being important, but an understanding of the underlying phenomena involves factors such as the chemistry and physics of early stages of oxidation, chemistry and bonding at the substrate/oxide interface, role of segregants on the strength of that bond, transport processes through scale, mechanisms of residual stress generation and relief, and fracture behavior at the oxide/substrate interface. Because of this complexity a multilaboratory program has been initiated under the auspices of the DOE Center of Excellence for the Synthesis and Processing of Advanced Materials, with strong interactions and cross-leveraging with DOE Fossil Energy and US industry. Objective is to systematically generate the knowledge required to establish a scientific basis for designing and synthesizing improved protective oxide scales/coatings (slow-growing, adherent, sound) on high-temperature materials without compromising the requisite properties of the bulk materials. The objectives of program work at Argonne are to (1) correlate actual corrosion performance with stresses, voids, segregants, interface roughness, initial stages of oxidation, and microstructures; (2) study such behavior in growing or as-grown films; and (3) define prescriptive design and synthesis routes to mechanically reliable surface oxides. Several techniques, such as Auger electron spectroscopy, X-ray diffraction, X-ray grazing incidence reflectance, grazing-angle X-ray fluorescence, optical fluorescence, and Raman spectroscopy, are used in the studies. Tne project has selected Fe-25 wt.% Cr-20 wt.% Ni and Fe-Cr-Al alloys, which are chromia- and alumina-formers respectively, for the studies. This paper presents some of the results on early stages of oxidation and on surface segregation of elements.

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14 p.

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OSTI as DE95013531

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  • 9. annual conference on fossil energy materials, Oak Ridge, TN (United States), 16-18 May 1995

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  • Other: DE95013531
  • Report No.: ANL/ET/CP--86147
  • Report No.: CONF-9505204--2
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 87831
  • Archival Resource Key: ark:/67531/metadc793376

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  • May 1, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • Feb. 1, 2016, 8:46 p.m.

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Natesan, K.; Veal, B.W.; Grimsditch, M.; Renusch, D. & Paulikas, A.P. Mechanically reliable surface oxides for high-temperature corrosion resistance, article, May 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc793376/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.