Y{sub 2}O{sub 3} morphology in an oxide dispersion strengthened FeAl alloy prepared by mechanical alloying
- Max-Planck-Inst. fuer Metallforschung, Stuttgart (Germany)
- TWI, Abington (United Kingdom)
The microstructure of an oxide dispersion strengthened FeAl (Zr,B) alloy, manufactured by mechanical alloying then extrusion, has been examined by HREM. Y{sub 2}O{sub 3} is dispersed throughout the FeAl matrix as particles, ranging in size from 5 nm upwards, which are effective in pinning the bulk dislocations. Although in the main the observed oxide particles are irregular in morphology, a significant minority of particles exhibit faceted surfaces. In particular, the facets of the Y{sub 2}O{sub 3} particles are observed to coincide with {l_brace}100{r_brace}{sub B2}, {l_brace}110{r_brace}{sub B2} and {l_brace}112{r_brace}{sub B2} planes of the surrounding bulk FeAl matrix. In addition, HREM imaging reveals uncoupled 1/2<111>{sub FeAl} superpartial dislocations lying a few nanometers from some of the FeAl-Y{sub 2}O{sub 3} interfaces.
- OSTI ID:
- 571923
- Report Number(s):
- CONF-961202-; TRN: IM9806%%148
- Resource Relation:
- Conference: 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996; Other Information: PBD: 1997; Related Information: Is Part Of High-temperature ordered intermetallic alloys VII; Koch, C.C. [ed.] [North Carolina State Univ., Raleigh, NC (United States)]; Liu, C.T. [ed.] [Oak Ridge National Lab., TN (United States)]; Stoloff, N.S. [ed.] [Rensselaer Polytechnic Inst., Troy, NY (United States)]; Wanner, A. [ed.] [Univ. Stuttgart (Germany)]; PB: 799 p.; Materials Research Society symposium proceedings, Volume 460
- Country of Publication:
- United States
- Language:
- English
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