F. Czerwinski
Oct 20, 2012
Citations
1
Influential Citations
82
Citations
Quality indicators
Journal
JOM
Abstract
Magnesium oxide, MgO, has a number of features that make it useful in a variety of applications; however, it does not offer protection to magnesium alloys against thermal oxidation. Although the thin oxide films, formed at ambient and elevated temperatures, create a diffusion barrier, they are sensitive to environmental factors and often experience severe damage. The thick oxide morphologies, formed at high temperatures, do not block the outward ion diffusion or, at a certain growth stage, also the inward penetration of gaseous species, leading to nonprotective oxidation. While additions of common alloying elements generally increase the oxidation rate of Mg-based alloys, doping of MgO with reactive-element atoms essentially improves its protective behavior.