Development of porosity in an oxide dispersion strengthened ferritic alloy containing nanoscale oxide particles

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2007.07.029· OSTI ID:935177

Schneibel, Joachim H ^[1]; Liu, Chain T ^[1]; Hoelzer, David T ^[1]; Mills, Michael J. ^[2]; Sarosi, P. M. ^[2]; Hayashi, Taisuke ^[2]; Wendt, Ullrich ^[3]; Heyse, Hartmut ^[3]

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1. ORNL
2. Ohio State University
3. Otto-von-Guericke Universitat, Magdeburg, Germany

The development of porosity at 1000 C in an oxide dispersion strengthened ferritic alloy containing ultra-fine oxide particles with diameters on the order of a few nm is investigated. A comparison with an alloy fabricated by internal oxidation demonstrates that the porosity formation is associated with mechanical alloying with Y2O3 in argon. The pores grow in spite of a sub-micron grain size suggesting that the grain boundaries are not effective paths for removing entrapped gas from the pores.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 935177
• Journal Information: Scripta Materialia, Vol. 57, Issue 11; ISSN 1359-6462
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON BASE ALLOYS
GRAIN BOUNDARIES
GRAIN SIZE
POROSITY
DISPERSION HARDENING
YTTRIUM OXIDES
PORE STRUCTURE
Oxide dispersion strengthening (ODS)
Porosity
Density
Grain Growth