Size effect of al particles on the oxidation of electrodeposited Ni-Al composite coatings

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	Size effect of al particles on the oxidation of electrodeposited Ni-Al composite coatings
	Y. Zhou ; X. Peng ; F. Wang
刊名	Oxidation of Metals
	2005
卷号	64 期号:3-4 页码:169-183
关键词	electrodeposition Ni-Al composite film high-temperature oxidation size effect nanoparticles nanocomposite film nickel morphology kinetics behavior growth scale alloy
ISSN号	0030-770X
中文摘要	Electrodeposited microparticle-dispersed composite coatings (EMCCs) and nanoparticle-dispersed composite coatings (ENCCs) of Ni-Al were developed by co-electrodeposition of Ni with various contents of Al particles. The Al microparticles were in a size range of 1 similar to 5 mu m, and the Al nanoparticles had an average size of 75 nm. TEM characterization showed that compared to EMCC, ENCC exhibited a more-homogeneous distribution of particles, a greatly narrowed interparticle spacing, and finer Ni grains. The oxidation performance at 950 degrees C of the as-deposited composite coatings depended not only on the aluminum content but also on the particle size, which was concluded from two observations: (1) for a given Al content, the oxidation resistance of the ENCC was better than that of the EMCC counterpart; (2) the content for the formation of a continuous alumina layer on the ENCC was significantly reduced compared to the EMCC. Codeposition of the nanoscale Al particles instead of the micrometer-sized counterparts led to a great increase of the number per unit volume of the Al particles available for alumina nucleation, which favored the ENCC Ni-Al to thermally grow alumina scales during a short transient stage of oxidation. A mechanism is proposed to interpret the particle size effect on the transient oxidation.
原文出处	://WOS:000231630300001
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/35297]
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	Y. Zhou,X. Peng,F. Wang. Size effect of al particles on the oxidation of electrodeposited Ni-Al composite coatings[J]. Oxidation of Metals,2005,64(3-4):169-183.
APA	Y. Zhou,X. Peng,&F. Wang.(2005).Size effect of al particles on the oxidation of electrodeposited Ni-Al composite coatings.Oxidation of Metals,64(3-4),169-183.
MLA	Y. Zhou,et al."Size effect of al particles on the oxidation of electrodeposited Ni-Al composite coatings".Oxidation of Metals 64.3-4(2005):169-183.