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Large scale, highly dense nanoholes on metal surfaces by underwater laser assisted hydrogen etching near nanocrystalline boundary
APPLIED SURFACE SCIENCE
  • Dong Lin, Purdue University
  • Martin Yi Zhang, Purdue University
  • Chang Ye, Purdue University
  • Zhikun Liu, Birck Nanotechnology Center, Purdue University
  • Richard Liu, Purdue University
  • Gary J. Cheng, Birck Nanotechnology Center, Purdue University
Abstract
A new method to generate large scale and highly dense nanoholes is presented in this paper. By the pulsed laser irradiation under water, the hydrogen etching is introduced to form high density nanoholes on the surfaces of AISI 4140 steel and Ti. In order to achieve higher nanohole density, laser shock peening (LSP) followed by recrystallization is used for grain refinement. It is found that the nanohole density does not increase until recrystallization of the substructures after laser shock peening. The mechanism of nanohole generation is studied in detail. This method can be also applied to generate nanoholes on other materials with hydrogen etching effect. (C) 2011 Elsevier B.V. All rights reserved.
Keywords
  • Nanoporous surfaces; Underwater laser assisted hydrogen etching; Nanocrystalline surface; Laser shock peening; SHOCK PROCESSING IMPACTS; SILICON; FABRICATION; MECHANISM; ARRAYS
Date of this Version
3-1-2012
DOI
10.1016/j.apsusc.2011.12.065
Citation
Applied Surface Science Volume 258, Issue 10, 1 March 2012, Pages 4254–4259
Citation Information
Dong Lin, Martin Yi Zhang, Chang Ye, Zhikun Liu, et al.. "Large scale, highly dense nanoholes on metal surfaces by underwater laser assisted hydrogen etching near nanocrystalline boundary" APPLIED SURFACE SCIENCE (2012)
Available at: http://works.bepress.com/dong_lin/7/