Multicomponent hard and superhard submicro- and nanocomposite coatings on the basis of titanium and iron nitrides

A. D. Korotaev, V. Yu Moshkov, S. V. Ovchinnikov, Yu P. Pinzhin, A. N. Tyumentsev, V. P. Sergeev, D. P. Borisov, V. M. Savostikov

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5 Citations (Scopus)

Abstract

Electron microscopy, X-ray structure analysis as well as micro- and nanohardness measurements are used to study the relation between the fine structure and variation of strength properties of nanostructured and nanocomposite Ti-Si-B-N and Ti-Al-Si-N coatings with high oxygen and carbon content. For all studied alloys and deposition modes we have revealed the crystalline phase Ti1-xSixN with the lattice parameters a = (0.416-0.420) ± 0.001 nm. In the conditions of low-temperature (T = 200 °C) coating deposition a two-level grain structure with the fragmentation of 0.1-0.3 μm grains into 15-20 nm subgrains and with {200} texture is formed. The generality of the conclusion about the two-level grain structure formation at a columnar growth of the coating is substantiated for (Fe, Cr, Ni)4N coatings. With silicon content growth texture-free coatings with lattice grain size less than 15 nm and high fraction of the amorphous phase are formed. At coating deposition temperatures 400-450 °C one can see a nanocomposite structure with the grain size d = 10-15 nm and no texture. At optimal compositions and synthesis conditions the hardness values exceed 40-50 GPa. We suppose that it is possible to achieve superhardness for multiphase grain boundary interlayers more than 1 nm thick.

Original languageEnglish
Pages (from-to)156-167
Number of pages12
JournalPhysical Mesomechanics
Volume10
Issue number3-4
DOIs
Publication statusPublished - May 2007
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces

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    Korotaev, A. D., Moshkov, V. Y., Ovchinnikov, S. V., Pinzhin, Y. P., Tyumentsev, A. N., Sergeev, V. P., Borisov, D. P., & Savostikov, V. M. (2007). Multicomponent hard and superhard submicro- and nanocomposite coatings on the basis of titanium and iron nitrides. Physical Mesomechanics, 10(3-4), 156-167. https://doi.org/10.1016/j.physme.2007.08.005