| Autor: |
Grillet AM; Microscale Science and Technology, Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185, USA. angrill@sandia.gov, Gorby AD, Trujillo SM, Grant RP, Hodges VC, Parson TB, Grasser TW |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of colloid and interface science [J Colloid Interface Sci] 2008 Jan 01; Vol. 317 (1), pp. 264-74. Date of Electronic Publication: 2007 Oct 22. |
| DOI: |
10.1016/j.jcis.2007.08.045 |
| Abstrakt: |
A method to measure interfacial mechanical properties at high temperatures and in a controlled atmosphere has been developed to study anodized aluminum surface coatings at temperatures where the interior aluminum alloy is molten. This is the first time that the coating strength has been studied under these conditions. We have investigated the effects of ambient atmosphere, temperature, and surface finish on coating strength for samples of aluminum alloy 7075. Surprisingly, the effective Young's modulus or strength of the coating when tested in air was twice as high as when samples were tested in an inert nitrogen or argon atmosphere. Additionally, the effective Young's modulus of the anodized coating increased with temperature in an air atmosphere but was independent of temperature in an inert atmosphere. The effect of surface finish was also examined. Sandblasting the surface prior to anodization was found to increase the strength of the anodized coating with the greatest enhancement noted for a nitrogen atmosphere. Machining marks were not found to significantly affect the strength. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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