Synthesis of nanocrystalline intermetallic layer by mechanical attrition

IMECH-IR > 力学所知识产出(1956-2008)

	Synthesis of nanocrystalline intermetallic layer by mechanical attrition
	Wu XL(武晓雷); Hong YS(洪友士); Tao N; Meng XK; Lu J; Lu K
会议录名称	TMS Annual Meeting
	2006
会议名称	135th TMS Annual Meeting, 2006
会议日期	March 12, 2006 - March 16, 2006
会议地点	San Antonio, TX, United states
摘要	By means of the technique of surface mechanical attrition treatment, the nanocrystalline (nc) intermetallic compound Co3Fe7 was synthesized in the surface layer of bulk cobalt. It was found that deformation-induced diffusion occurred, leading to the extension of solid solution. A series of phase transformation proceeded with increasing Fe content (atom percent) and followed the route from hcp (less than 4 percent Fe) to fee (4-11 percent Fe) and finally to bcc (> 11% Fe). Nanoscale composition analyses by EDX showed that Fe contents are significantly higher in grain boundaries and triple junctions than in grain interiors. It was turned out to be the conclusion that fast diffusion along grain boundaries dominate in larger grains whereas diffusion along triple junctions in nc intermetallic grains. The alloying on the atomic level was ascribed to deformation-induced intermixing during deformation at high strain rates. The mechanism of intermetallic formation was a result of numerous nucleation events followed by limited growth.
关键词	Intermetallic Grains Mechanical Attrition Surface Mechanical Attrition Treatment
ISBN号	087339626X
收录类别	EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/60291
专题	力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Wu XL,Hong YS,Tao N,et al. Synthesis of nanocrystalline intermetallic layer by mechanical attrition[C]TMS Annual Meeting,2006.

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