TEM study of TiN coatings fabricated by mechanical milling using vibration technique

S. Romankov, Y. Hayasaka, G. Kalikova, Sergey Victorovich Komarov, N. Hayashi, Eiki Kasai

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

A mechanical milling method was used for the deposition of TiN coatings. The principle of this method is that a substrate and powder were placed along with balls into the vibration chamber that was vibrated by a mechano-reactor. During mechanical milling process, the substrate surface was impacted by a large number of flying balls. The TiN particles trapped in between the balls and the substrate became cold welded to the surface. The repeated substrate-to-ball collisions forged TiN particles into a coating on the substrate surface. The process allowed the thick TiN coatings to be produced at room temperature in an ambient atmosphere. TEM study of the as-fabricated coatings was carried out. The coating formation depended on the size of the initial TiN particles. The 50-nm TiN nanoparticles were more easily cold welded than 1.5-μm microparticles. The nanoparticles had a tendency to consolidate and densify into the bulk material under the applied compressive loading. The TiN particles better consolidated and densified on the hard Ti surface than on the soft Al one.

Original languageEnglish
Pages (from-to)1879-1884
Number of pages6
JournalSurface and Coatings Technology
Volume203
Issue number13
DOIs
Publication statusPublished - 2009 Mar 25

Keywords

  • Coating
  • Mechanical alloying
  • Mechanical milling
  • Nanostructure
  • TiN

ASJC Scopus subject areas

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

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