Surface morphology of a laser surface nitrided and etched Ti-6Al-4V alloy

Hau Chung Man, N. Q. Zhao, Z. D. Cui

Research output: Journal article publicationJournal articleAcademic researchpeer-review

50 Citations (Scopus)

Abstract

A laser surface nitriding process was applied to a Ti-6Al-4V alloy to obtain a surface layer consisting of TiN dendrites and a titanium alloy matrix. The dendritic volume fraction can be controlled by varying the nitrogen flow rate during the laser gas nitriding. By subsequently applying a selective etching process, the matrix material in the alloyed layer can be selectively removed and a three-dimensional network of TiN dendrites is left on the surface anchoring on the substrate. The 3D dendritic network provides extra surface area and a locking mechanism for the adhesion joint with a ceramic layer. The interface cross-section microstructure of such adhesion jointing surfaces is discussed.
Original languageEnglish
Pages (from-to)341-346
Number of pages6
JournalSurface and Coatings Technology
Volume192
Issue number2-3
DOIs
Publication statusPublished - 21 Mar 2005

Keywords

  • Adhesion
  • Laser nitriding
  • Selective etching
  • Titanium alloy

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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