| Oxidation behaviour of sputter-deposited Ni-Cr-Al micro-crystalline coatings | |
| Z. Y. Liu; W. Gao; K. L. Dahm; F. H. Wang | |
| 1998 | |
| Source Publication | Acta Materialia
 |
| ISSN | 1359-6454 |
| Volume | 46Issue:5Pages:1691-1700 |
| Abstract | Unbalanced magnetron sputter deposition was used to produce Ni-20Cr-xAl (s = 2, 3, 5 wt%) coatings on the substrates of the same materials. The effects of coating grain size and Al content on oxidation behaviour at 1000 degrees C have been studied. It a as found that the oxidation products were determined by both grain size and Al content. alpha-Al2O3 scales formed on the coatings containing as little as 2.4 wt% Al when the coating grain size was <100 nm. The oxidation behaviour was described using Wagner's theory to include short-circuit diffusion. With the formation of alpha-Al2O3 scale on coatings, the oxidation kinetics did not follow a parabolic law, but could be described with a new model that considered diffusion through both the lattice and grain boundaries. Based on the experimental results, a map showing the relationship between Al content, alloy grain size, and oxidation products has been established. (C) 1998 Acta Metallurgica Inc. |
| description.department | univ auckland, dept chem & mat engn, auckland, new zealand. acad sinica, inst corros & protect met, state key lab corros & protect, shenyang 110015, peoples r china.;gao, w (reprint author), univ auckland, dept chem & mat engn, auckland, new zealand |
| Keyword | Alloy Grain-size High-temperature Oxide Scales Resistance Superalloy K38g Transport Diffusion Chromium Yttrium |
| URL | 查看原文 |
| WOS ID | WOS:000072632800021 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/37724 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Z. Y. Liu,W. Gao,K. L. Dahm,et al. Oxidation behaviour of sputter-deposited Ni-Cr-Al micro-crystalline coatings[J]. Acta Materialia,1998,46(5):1691-1700. |
| APA | Z. Y. Liu,W. Gao,K. L. Dahm,&F. H. Wang.(1998).Oxidation behaviour of sputter-deposited Ni-Cr-Al micro-crystalline coatings.Acta Materialia,46(5),1691-1700. |
| MLA | Z. Y. Liu,et al."Oxidation behaviour of sputter-deposited Ni-Cr-Al micro-crystalline coatings".Acta Materialia 46.5(1998):1691-1700. |
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