Abstract
Superhard nanostructured multielement coatings based on (Ti-Hf-Zr-V-Nb)N composition have been studied before and after thermal annealing at 600°C. It has been established that capture of positrons on defects takes place at the boundaries of nanograins and on interfaces (vacancies, nanopores, triple and higher-order joints of nanograins). Three-dimensional maps of the distribution of elements in super-hard coatings have been obtained using micro-proton-beam induced X-ray emission (μ-PIXE) measurements. Analysis of the μ-PIXE elemental profiles and defect profiles (obtained using a focused positron beam) helps understanding the physical picture of processes related to the formation of interfaces and sub-boundaries in nanostructured (Ti-Hf-Zr-V-Nb)N coatings.
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Original Russian Text © A.D. Pogrebnyak, V.M. Beresnev, D.A. Kolesnikov, M.V. Kaverin, A.P. Shypylenko, K. Oyoshi, Y. Takeda, R. Krause-Rehberg, A.G. Ponomarev, 2013, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2013, Vol. 39, No. 6, pp. 16–25.
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Pogrebnyak, A.D., Beresnev, V.M., Kolesnikov, D.A. et al. The effect of segregation and thermodiffusion on the formation of interfaces in nanostructured (Ti-Hf-Zr-V-Nb)N multielement coatings. Tech. Phys. Lett. 39, 280–283 (2013). https://doi.org/10.1134/S1063785013030231
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DOI: https://doi.org/10.1134/S1063785013030231