Studies on Transient-Stage-Scale Growth on Fe-22wt.% Cr Alloys Containing 120 PPM La + 270 PPM Ce

Abstract

Reactive elements (RE), such as Ce, La or Y, are known to improve oxidation resistance of Fe based alloys that form Cr2O3 scales. The current investigation aims to characterize the oxide scale in a Fe-22 wt.% Cr alloy containing 120 ppm La and 270 ppm Ce (added during melt-stage processing) as a function of oxidation times (at 800-deg C in dry air) during the transient stage of scale formation. The surface oxidation processes were imaged in-situ through a Confocal Scanning Laser Microscope (CSLM). The results are correlated with post-experiment characterization through FEG-SEM and dual beam FIB-SEM. The evolution of the reactive-elements-containing scale, its morphology and composition are determined.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 2009
Accession Number
ADA538480

Entities

People

  • Gordon R. Holcomb
  • Junqin Zhu
  • L. M. Fernandez Diaz
  • P. D. Jablonski ;d. E. Alman
  • Swetha Sridhar

Organizations

  • United States Department of Energy

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alloys
  • Boundaries
  • Bulk Materials
  • Chemical Compounds
  • Chemistry
  • Electron Microscopes
  • Elements
  • Grain Boundaries
  • High Temperature
  • Materials
  • Materials Science
  • Microscopes
  • Oxidation
  • Oxidation Resistance
  • Oxides
  • Personal Information Managers
  • Rare Earth Elements

Fields of Study

  • Materials science

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.
  • Mycotoxin ecology in Amazonian ecosystems.

Technology Areas

  • Directed Energy