| Autor: | W. D. Cho, Insoo Kim, Hyun-Mok Kim |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Materials science
Mechanical Engineering Alloy Metallurgy technology industry and agriculture Analytical chemistry Oxide chemistry.chemical_element Yttrium Adhesion engineering.material Atmospheric temperature range Microstructure chemistry.chemical_compound Reaction rate constant chemistry Mechanics of Materials visual_art engineering Aluminium alloy visual_art.visual_art_medium General Materials Science |
| Zdroj: | Journal of Materials Science. 35:4695-4703 |
| ISSN: | 0022-2461 |
| DOI: | 10.1023/a:1004846805830 |
| Popis: | The effect of yttrium addition on the oxidation behavior of Fe3Al alloys was investigated in terms of oxidation rate and oxide adhesion in the temperature range of 800 to 1100 °C. The oxidation rate of the alloys, Fe-14.3 wt% Al and Fe-14.1 wt% Al-0.3 wt% Y, was nearly identical, and the parabolic rate constant as a function of temperature is found to be Kp = 5128 exp[−39506 (cal/mol)/RT] mg2/cm4 hr. While the alumina scale formed on the Y-free Fe3Al alloy was observed to be fragile and spalled easily, the oxide layer formed on the Fe3Al-Y was protective, dense, and adhesive. Based on the microstructural, morphological, and compositional studies, the adhesion improvement due to the yttrium addition was discussed in terms of growth stress, the formation of pegs and scale growth mechanism. |
| Databáze: | OpenAIRE |
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