Influence of Zr and O on the structure and properties of TiC(N) coatings deposited by magnetron sputtering of composite TiC 0.5+ZrO 2 and (Ti, Zr)C 0.5+ZrO 2 targets

D. V. Shtansky, A. V. Bondarev, Ph V. Kiryukhantsev-Korneev, A. N. Sheveyko, Yu S. Pogozhev

Research output: Contribution to journalArticlepeer-review

Abstract

The effect of Zr and O incorporation on the structure and properties of TiC(N) coatings deposited by DC magnetron sputtering of composite TiC 0.5+xZrO 2 (x=10 and 20wt.%) and (Ti,Zr)C 0.5+10%ZrO 2 targets in an argon atmosphere or reactively in a gaseous mixture of Ar+N 2 is presented. The structure, elemental and phase composition of the coatings were studied by means of X-ray diffraction, scanning electron microscopy, and glow discharge optical emission spectroscopy. The coatings were characterized in terms of their hardness, elastic modulus, and elastic recovery using the load-depth-sensing nanoindentation method. Tribological properties were investigated using ball-on-disk tests against cemented carbide at 25°C and alumina in the temperature range of 25-500°C. To evaluate the oxidation resistance, the coatings were annealed in air at 400, 550, and 600°C for 1h. The obtained results show that the TiZrCO(N) coatings exhibit a peak hardness versus nitrogen partial pressure. The coatings with maximum hardness tested at room temperature against WC+Co and Al 2O 3 counterparts showed low friction coefficients below 0.25. At higher temperatures 300-500°C, the friction coefficient against an Al 2O 3 ball was recorded to be 0.6. The tribological tests of the coatings demonstrated their high wear resistance at moderate temperatures 25-300°C (wear rate, k~10 -6mm 3N -1m -1). Moreover, the coatings with high Zr content were the most wear resistant. The oxidation resistance of the Zr-doped TiCON coatings was not as high as expected and restricted by 600°C. The combination of high hardness about 40GPa with low friction coefficient and superior wear resistance makes the TiZrCON coatings promising candidates for various dry tribological applications.

Original languageEnglish
Pages (from-to)2506-2514
Number of pages9
JournalSurface and Coatings Technology
Volume206
Issue number8-9
DOIs
Publication statusPublished - 15 Jan 2012
Externally publishedYes

Keywords

  • High-temperature oxidation resistance
  • Magnetron sputtering
  • Mechanical and tribological properties
  • Structure
  • TiZrCO(N) coatings

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