| On the exclusive growth of external chromia scale on the novel electrodeposited Cu-Ni-Cr nanocomposites |
| Z. Huang; X. Peng; C. Xu; F. Wang
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| 2007
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| 发表期刊 | Journal of Materials Research
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| ISSN | 0884-2914
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| 卷号 | 22期号:11页码:3166-3177 |
| 摘要 | Novel metal-matrix nanocomposites (MMNCs) of Cu-30Ni-20Cr and Cu-50Ni-20Cr (by wt%), having a nanocrystalline Cu-Ni solid solution matrix with the dispersion of Cr nanoparticles, were fabricated by coelectrodeposition. Both nanocomposites exclusively grew external chromia scale during oxidation at 800 degrees C in air. The codeposited Cr nanoparticles, together with the numerous grain boundaries in the Cu-Ni matrix, promoted the establishment of a continuous chromia scale during the initial and transient oxidation stage, and then they functioned as "a reservoir" supplying sufficient Cr flux for the exclusive growth of the scale during the steady-state stage. The theoretical treatment using a two-phase alloy oxidation model indicates that high Cr diffusivity correlated with the persistence of an ultrafine-grained structure of the Cu-Ni matrix during oxidation is crucial to the exclusive chromia growth. Ni content increase did not significantly affect the chromia scale formation. This is fundamentally different from the oxidation of conventional Cu-Ni-Cr alloys investigated for comparison. |
| 部门归属 | chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;peng, x (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;xpeng@imr.ac.cn
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| 关键词 | Nanocrystalline Materials
Grain-growth
Atm O-2
Oxidation
Alloys
Diffusion
Nickel
Creep
Cr2o3
700-900-degrees-c
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| URL | 查看原文
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| WOS记录号 | WOS:000250768700024
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/33598
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
Z. Huang,X. Peng,C. Xu,et al. On the exclusive growth of external chromia scale on the novel electrodeposited Cu-Ni-Cr nanocomposites[J]. Journal of Materials Research,2007,22(11):3166-3177.
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| APA |
Z. Huang,X. Peng,C. Xu,&F. Wang.(2007).On the exclusive growth of external chromia scale on the novel electrodeposited Cu-Ni-Cr nanocomposites.Journal of Materials Research,22(11),3166-3177.
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| MLA |
Z. Huang,et al."On the exclusive growth of external chromia scale on the novel electrodeposited Cu-Ni-Cr nanocomposites".Journal of Materials Research 22.11(2007):3166-3177.
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