Processing, properties, and wear resistance of aluminides [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of the Interior, 1993.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- 42 pages : digital, PDF file
- Additional Creators
- United States. Department of the Interior and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- Fully dense alloys based on Fe₃Al were produced by reaction synthesis from low cost elemental powders using hot pressing, hot isostatic pressing or Ceracon process. The reaction proceeds by outward spreading of a transient liquid phase from the initial aluminum particle site and precipitation of the compound phase from the liquid. Combustion synthesized material has a very fine grain size that is resistant to coarsening at high temperature because of a high density of fine oxides from the prior particle boundaries. The fine grain size results in approximately twice the yield strength in the reaction synthesized material compared to hot extruded pre-alloyed powder. Combustion synthesis has also been successfully applied to joining Fe₃Al and to forming coatings on carbon steel substrates. Combustion synthesis has been shown to be viable for fabricating trialuminides from elemental powder compacts. Al₃Ti, Al₇₃Ti₂₄Cr₃ and Al₆₇Ti₂₅Cr₈ were examined. Fully dense, homogeneous materials exhibiting an equiaxed grain structure were produced by conducting reaction and homogenization under pressure, or in a furnace at ambient pressure and subsequently densifying the porous preform by hot consolidation. The tetragonal DO₂₂ structure was the primary reaction product for all compositions. Most of the Cr remained undissolved after reaction and a homogenization heat treatment at 1200C or above was used to put the Cr into solution and form the desired L1₂ phase.
- Report Numbers
- E 1.99:egg-ms--10441
egg-ms--10441 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
03/01/1993.
"egg-ms--10441"
"DE93012186"
": Contract JO134035"
Wright, J.K.; Wright, R.N.; Rabin, B.H.
EG and G Idaho, Inc., Idaho Falls, ID (United States) - Type of Report and Period Covered Note
- Topical; 03/01/1993 - 03/01/1993
- Funding Information
- AC07-76ID01570
View MARC record | catkey: 14457528