Thermal evolution of thin boehmite films

Lamber, Ryszard; Kępiński, Leszek; Jabłońska, G.

doi:10.1007/bf00551488

Cited by 4 publications

(1 citation statement)

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“…9(a)] further support this conclusion. Thermal effects on, and related structural transformations between, the hydroxides, oxyhydroxides and oxides of A1 are known to be complex (45,46), with amorphous structures existing at high temperatures (>600~ Hydrogen, or bound water, in anodic oxide films is known to promote and maintain amorphous oxide structures (10,47). Positive SIMS analysis of the three sample types investigated revealed considerable amounts of H throughout the profiled thickness of the oxide layers (cf., Fig.…”

Section: Discussionmentioning

confidence: 98%

Spectroscopic Investigations of Porous and Sealed Anodic Alumina Films

Murphy¹,

Wainright²,

Lenczewski³

et al. 1989

J. Electrochem. Soc.

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Porous anodic alumina films grown in sulfuric acid and similar specimens sealed in nickel acetate and dichromate sealing baths were subjected to a number of surface and bulk analytical techniques (XPS, RBS, SIMS, and XRD). All the oxide films were found to be amorphous‐like in nature, to contain significant amounts of H, and have a S content of 1.5–3 atomic percent (a/o) uniformly distributed throughout the oxide matrices. For the sealed oxide films, surface enrichment of Ni and Cr species was observed, being particularly significant in the case of Ni. Uniform bulk concentrations for Ni and Cr were found to be of the order of 0.5 and 1 a/o, respectively. The S, Ni, and Cr species present in the oxide films were identified as sulfate‐like, nickel hydroxide and dichromate‐like in nature. Ion beam‐induced reduction of incorporated S, Ni, Cr, and C species was observed.

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