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A. D. Pogrebnyak, A. P. Shpak, V. M. Beresnev, G. V. Kirik, D. A. Kolesnikov, F. F. Komarov, P. Konarski, N. A. Makhmudov, M. V. Kaverin and V. V. Grudnitskii, “Stoichiometry, Phase Composition, and Properties of Superhard Nanostructured Ti-Hf-Si-N Coatings Obtained by Deposition from High Frequency Vacuum-Arc Discharge,” Technical Physics Letters (Russian), Vol. 37, No. 7, 2011, pp. 636-640.

has been cited by the following article:

• TITLE: Investigation of Element Profiles, Defects, Phase Composition and Physical and Mechanical Properties of Superhard Coatings Ti-Hf-Si-N

  AUTHORS: Alexander D. Pogrebnjak

  KEYWORDS: Superhards; Coatings; Composition; Thermal Stability; Wear

  JOURNAL NAME: Materials Sciences and Applications, Vol.4 No.4A, April 29, 2013

  ABSTRACT: This paper investigates the microstructure, physical, chemical and mechanical of superhard nanocomposite of Ti-Hf-Si-N. The coatings were grown by C-PVD method. Profiles of elements and vacancy-type defects (S-parameter measurements of the Doppler broadening of the annihilation peak DBAP) in the studied coatings were investigated. Defined and calculated the elastic modulus E, hardness H, friction, adhesion. Wear rate was determined as a function of the bias potential supplied to the substrate and the pressure in the chamber. The developed coatings have hardness of 37.8 to 48 GPa, the friction coefficient of 0.48 to 0.15, the grain size of the solid solution from 3.9 to 10.8 nm (depending on deposition conditions). It was found that positrons are trapped by defects at the junction of three or more nanograins interfaces. In some cases, there was formed two phases in coatings: a solid solution (Ti, Hf)N with different volume content of Hf in a solid solution, and an amorphous phase α-Si3N4 (the layer between the nanograins).