| Preparation and oxidation resistance of a crack-free Al diffusion coating on Ti22Al26Nb | |
| K. Zhang; Q. M. Wang; C. Sun; F. H. Wang | |
| 2007 | |
| 发表期刊 | Corrosion Science
 |
| ISSN | 0010-938X |
| 卷号 | 49期号:9页码:3598-3609 |
| 摘要 | A crack-free Al diffusion coating has been developed to improve the oxidation resistance of Ti22Al26Nb. It was produced by a two-step method; an Al film was deposited on the substrate alloy by arc ion plating followed by a diffusion process conducted at 873 K in pure Ar to form the Al diffusion coating. The two-step method lowers the temperature required to form the diffusion coating, which dramatically decreases the thermal stress developed in the coating and results in it being crack-free. The oxidation resistance of the non-coated Ti22Al26Nb alloy in isothermal and cyclic tests in air at 1073 K was poor, but the coated specimens possessed excellent oxidation resistance because a protective alpha-Al2O3 scale formed. The life of the Al diffusion coating greatly depends upon the rapid initial formation of a protective Al2O3 scale and interdiffusion between coating and substrate. Once the stable Al2O3 scale has formed and the composition changes from (Ti, Nb)Al-3 into (Ti, Nb)Al-2, the coating has a long life. Published by Elsevier Ltd. |
| 部门归属 | chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. shenyang normal univ, chem & life coll, shenyang 110034, peoples r china.;zhang, k (reprint author), chinese acad sci, inst met res, state key lab corros & protect, 72 wenhua rd, shenyang 110016, peoples r china;kezhang@imr.ac.cn csun@imr.ac.cn |
| 关键词 | Alloy Metal Coatings Titanium Effects Of Strain Oxidation Titanium-aluminum System Thermal Barrier Coatings Pack Cementation Method Cyclic Oxidation Orthorhombic Alloys Tial Intermetallics Nb Addition Behavior Phases Al3ti |
| URL | 查看原文 |
| WOS记录号 | WOS:000249776500010 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/34036 |
| 专题 | 中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | K. Zhang,Q. M. Wang,C. Sun,et al. Preparation and oxidation resistance of a crack-free Al diffusion coating on Ti22Al26Nb[J]. Corrosion Science,2007,49(9):3598-3609. |
| APA | K. Zhang,Q. M. Wang,C. Sun,&F. H. Wang.(2007).Preparation and oxidation resistance of a crack-free Al diffusion coating on Ti22Al26Nb.Corrosion Science,49(9),3598-3609. |
| MLA | K. Zhang,et al."Preparation and oxidation resistance of a crack-free Al diffusion coating on Ti22Al26Nb".Corrosion Science 49.9(2007):3598-3609. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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