Influence of the Processing Conditions on the Characteristics of the Clad Layers Produced with Laminar Plasma Technology

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	Influence of the Processing Conditions on the Characteristics of the Clad Layers Produced with Laminar Plasma Technology
	Ma W(马维)
刊名	Applied Surface Science
	2006
通讯作者邮箱	watwm@imech.ac.cn
卷号	252 期号:23 页码:8352-8359
ISSN号	0169-4332
通讯作者	Ma, W (reprint author), Chinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China.
中文摘要	Laminar plasma technology was used to produce ceramic hardened layers of Al2O3-40% mass Ni composite powders on stainless steel substrates. In order to investigate the influences of processing conditions on the morphologies of the surface modified layers, two different powder-feeding methods were tested, one with carrier gas called the powder injection method, and the other without carrier gas called powder transfers method. The microscopic investigations demonstrate that the cross-section of the clad layers consists of two distinct microstructural regions, in which the Al2O3 phases exhibit different growth mechanisms. When the powder transfers method is adopted, the number density and volume fraction of the Al2O3 particles increase considerably and their distributions exhibit zonal periodical characteristics. When the powder-feeding rate increases, the microstructure of the Al2O3 phases changes from a small globular to a long needle shape. Finite element simulations show that the transient thermo-physical features of the pool substances, such as solidification rate and cooling rate, influence strongly the mechanisms of the nucleation and the directional growth of the Al2O3 phases in the thermal processing.
学科主题	力学
类目[WOS]	Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
研究领域[WOS]	Chemistry ; Materials Science ; Physics
关键词[WOS]	BEAM
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000241050300055
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16346]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Ma W. Influence of the Processing Conditions on the Characteristics of the Clad Layers Produced with Laminar Plasma Technology[J]. Applied Surface Science,2006,252(23):8352-8359.
APA	马维.(2006).Influence of the Processing Conditions on the Characteristics of the Clad Layers Produced with Laminar Plasma Technology.Applied Surface Science,252(23),8352-8359.
MLA	马维."Influence of the Processing Conditions on the Characteristics of the Clad Layers Produced with Laminar Plasma Technology".Applied Surface Science 252.23(2006):8352-8359.