Effect of aluminum ion implantation on the oxidation of an Fe-6 at. % Al alloy at 1173 K

Journal Article · Tue Dec 01 04:00:00 EST 1987 · Oxid. Met.; (United States)

DOI:https://doi.org/10.1007/BF00666722· OSTI ID:5390583

Smith, P J; Beauprie, R M; Smeltzer, W W; Stevanovic, D V; Thompson, D A

Samples of an Fe-6 at.% Al alloy were implanted with doses of 5 x 10/sup 16/-3 x 10/sup 17/ Al/sup +/ ions/cm/sup 2/ at 100 kV, and subsequently oxidized at 1173 K in O/sub 2/ gas at 27 kPa. By comparison with the behavior of unimplanted specimens, no effect on oxidation was observed if the dose of implant was less than 1 x 10/sup 17/ Al/sup +/ ions/cm/sup 2/. At doses of 1 x 10/sup 17/ Al/sup +/ ions/cm/sup 2/ or higher, a change in the oxide scaling morphology was effected from a duplex ..cap alpha..-Fe/sub 2/O/sub 3/-..cap alpha..-Al/sub 2/O/sub 3/ scale to an ..cap alpha..-Al/sub 2/O/sub 3/-enriched film with a dispersion of ..cap alpha..-Fe/sub 2/O/sub 3/ nodules. Oxygen uptake by the high-dose samples was due principally to nodule formation and weight gains after 45 hr were lower by 50-70% as compared with the unimplanted material. Nucleation and growth of the nodules occurred only within the first 5 hr of reaction, but their presence acted as an upper limit on the benefits provided by implantation of aluminum. Nodule formation was shown to be characteristic of the oxidation properties of the alloy material, not an extraneous feature introduced by the implantation process itself. Surface preparation prior to implantation had little effect on oxidation: high-dose electropolished samples behaved similarly to mechanically polished samples when implanted to comparable doses.

• Research Organization: Univ. of Cambridge (England)
• OSTI ID: 5390583
• Journal Information: Oxid. Met.; (United States), Journal Name: Oxid. Met.; (United States) Vol. 28:5/6; ISSN OXMEA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360105* -- Metals & Alloys-- Corrosion & Erosion
656003 -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ALUMINIUM
ALUMINIUM ALLOYS
ALUMINIUM IONS
BACKSCATTERING
BEAM CURRENTS
BEAMS
CHARGED PARTICLES
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CORROSION RESISTANCE
CURRENTS
ELASTIC SCATTERING
ELEMENTS
HELIUM IONS
ION BEAMS
ION IMPLANTATION
IONS
IRON ALLOYS
IRON BASE ALLOYS
METALLURGICAL EFFECTS
METALS
NANO AMP BEAM CURRENTS
OXIDATION
RUTHERFORD SCATTERING
SCALING
SCATTERING