Characterization of internal oxidation and permeability of oxygen in Pd/Al alloys using hydrogen isotherms
- Univ. of Vermont, Burlington, VT (United States)
- Indian Inst. of Technology, Kanpur (India). Dept. of Materials and Metallurgical Engineering
- Argonne National Lab., IL (United States). Materials Science Div.
Eastman and Ruehle have shown that substitutional fcc Pd-Al alloys can be internally oxidized to produce Al{sub 2}O{sub 3} precipitates within a metal matrix. Emphasis in this study will be characterizing of internally oxidized alloys using hydrogen at contents r > 0.01; these are easily accessible by gas phase measurements which will be carried out to p{sub H{sub 2}} {le} 5 bar. The hydrogen isotherms of palladium and a Pd{sub 0.97}Al{sub 0.03} alloy both exhibit plateau pressure regions where a dilute and hydride phase co-exist. If complete internal oxidation takes place, it is expected that the isotherm for the Pd{sub 0.97}Al{sub 0.03} alloy will change to that for pure Pd. Partial oxidation should lead to two plateau pressures, one characteristic of the alloy and one of pure Pd and their relative breadths will be proportional to the fractions of each.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 215360
- Journal Information:
- Scripta Materialia, Vol. 34, Issue 6; Other Information: PBD: 15 Mar 1996
- Country of Publication:
- United States
- Language:
- English
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