Deformation of solids with nanoscale pores by the action of capillary   forces

doi:10.1016/j.actamat.2009.08.008

CORC > 北京大学 > 工学院

	Deformation of solids with nanoscale pores by the action of capillary forces
	Weissmueller, J. ; Duan, H.L. ; Farkas, D.
刊名	acta materialia
	2010
关键词	Porous material Capillary phenomena Interfaces Elastic behaviour Nanostructure SURFACE-STRESS NANOPOROUS GOLD POROUS SILICON METAL INTERFACES TENSION PHASE TRANSFORMATION NANOPARTICLES EQUILIBRIUM
DOI	10.1016/j.actamat.2009.08.008
英文摘要	We analyze the various strain measures by which nanoporous materials react to changes in their surface stress and surface stretch at the solid-pore interface. Results of continuum mechanics are given for model geometries, arrays of spheres and fibres as well as solids with spherical and cylindrical voids. The findings are supported by atomistic simulation. The results for the mean stress agree with predictions of the generalized capillary equation of Weissmuller and Cahn, and they are incompatible with the notion of Laplace pressure. By contrast, no general relation between the mean stress and the macroscopic dimensional change could be identified. Even though certain microstructures with quite different geometry exhibit strikingly similar behaviour, others differ significantly. The macroscopic dimensional change can be largely enhanced compared with the local strain of the nanoscale building blocks. This fact can be exploited to amplify the stroke of nanoporous metal actuators. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000272405600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; SCI(E); 31; ARTICLE; 1; 1-13; 58
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/245566]
专题	工学院
推荐引用方式 GB/T 7714	Weissmueller, J.,Duan, H.L.,Farkas, D.. Deformation of solids with nanoscale pores by the action of capillary forces[J]. acta materialia,2010.
APA	Weissmueller, J.,Duan, H.L.,&Farkas, D..(2010).Deformation of solids with nanoscale pores by the action of capillary forces.acta materialia.
MLA	Weissmueller, J.,et al."Deformation of solids with nanoscale pores by the action of capillary forces".acta materialia (2010).