On the exclusive growth of external chromia scale on the novel electrodeposited Cu-Ni-Cr nanocomposites

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	On the exclusive growth of external chromia scale on the novel electrodeposited Cu-Ni-Cr nanocomposites
	Z. Huang ; X. Peng ; C. Xu ; F. Wang
刊名	Journal of Materials Research
	2007
卷号	22 期号:11 页码:3166-3177
关键词	nanocrystalline materials grain-growth atm o-2 oxidation alloys diffusion nickel creep cr2o3 700-900-degrees-c
ISSN号	0884-2914
中文摘要	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.
原文出处	://WOS:000250768700024
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/33598]
专题	金属研究所_中国科学院金属研究所
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.
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.
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.