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Material specs for hard alumite

I am a post graduate research student in the field of robot structures. I am unable to find the elastic modulus for hard alumite used in pneumatic actuators. Seeing your discussion has helped me understand to an extent what it is but could you also help me with the material spec for it.

Thanks in advance,

Chandra Murugayah
- Perth, Western Australia
2003

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2003

One abstract thrown up by a quick web search reads:

TiO₂ was deposited onto hard alumite (Al/Al₂O₃/TiO₂) by alternating current electrolysis and precipitation in (NH₄)₂[TiO(C₂O₄)₂] solution at various temperatures, where the hard alumite was prepared by the anodic oxidation of aluminum in sulfuric acid (Al/Al₂O₃). The TiO₂ electrodeposition mainly occurred at temperatures lower than about 50 °C, while the TiO₂ deposition due to TiO(C₂O₄)22&#8722 absorption onto alumina predominantly occurred at temperatures higher than about 50 °C. The amount of deposited TiO₂ increased with the increase in the deposition temperature, leading to high photocatalytic activity. The deposited TiO₂ at 90 °C followed by heat-treatment at 550 °C had an anatase structure and showed a high photocatalytic activity for the decomposition of acetaldehyde even under fluorescent lamp illumination. The Al/Al₂O₃/TiO₂ prepared at 50 °C was optimal for practical use, because of a relatively high activity and the sufficient adhesion strength between the TiO₂ and the Al/Al₂O₃ substrate due to the presence of the deposited TiO₂ in the pores of the alumina film.

May be of some use to you? - maybe not the TiO₂ part, but hard alumite is described.

Bill Reynolds [deceased]
consultant metallurgist - Ballarat, Victoria, Australia
We sadly relate the news that Bill passed away on Jan. 29, 2010.