Effect of alloying with Cu and TiN addition on the electrochemical behavior of nanocrystalline Ni processed by magnetron sputtering

Electrochemical behavior of the nanocomposite coatings plays an important role in order to side their applications in protective coatings either on the different tools used in automobile as well as aerospace industries or on engineering materials. For this purpose, nanocrystalline Ni, Ni90Cu10, Ni-TiN and Ni90Cu10‑TiN thin films have been deposited by reactive magnetron co-sputtering on silicon substrate. Grain sizes and the phases present in the processed films have been analyzed by using a grazing incident X-ray diffraction pattern. The average grain sizes are measured to be around 13.6 ± 0.4 nm for Ni and 9.6 ± 0.3 nm for TiN. Microstructural and elemental analyses of the investigated samples before and after the electrochemical tests have been done by field emission scanning electron microscopy and an energy dispersive X-ray analyzer, respectively. Microstructure for pure Ni films reveals the formation of pits on the surface after electrochemical test. Furthermore, the electrochemical behaviour of these thin films has been investigated with the help of potentiodynamic polarization experiments. Nanocrystalline Ni films are found to be more susceptible for pitting corrosion. Further, resistance for pitting corrosion is found to increase with alloying with Cu as well as TiN addition in Ni matrix. Formation of TiO2 protective layer has been confirmed by X-ray photo electron microscopy (XPS).

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The study of antifriction aluminum alloys, containing iron, before and after tribological tests

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The influence of hot isostatic pressing on microstructure and mechanical properties intermetallic alloy VKNA-4

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The study of technological properties of the titanium alloy Ti-6Al-4V. Part 2

R.V. Safiullin, M.H. Muhametrahimov, S.P. Malycheva, A.R. Safiullin, A.N. Kozlov, A.V. Berestov, S.A. Harin, M. Morozov

Structure and Superplasticity of the Al-Mg-TM Alloy after Equal Channel Angular Pressing and Rolling

O. Sitdikov, E. Avtokratova, O. Latypova, M.V. Markushev

Effect of ultrasonic treatment on the structure and microhardness of ultrafine grained nickel processed by high pressure torsion

A.A. Mukhametgalina, A.A. Samigullina, S.N. Sergeev, A.P. Zhilyaev, A.A. Nazarov, Y.R. Zagidullina, N.Y. Parkhimovich, V.V. Rubanik, Y.V. Tsarenko

1. Indian Institute of Technology Kharagpur, India -