The Effect of Heat Treatment on the Microstructure and Mechanical Properties of 2D Nanostructured Au/NiFe System
Tatiana Zubar,
Valery Fedosyuk,
Daria Tishkevich,
Oleg Kanafyev,
Ksenia Astapovich,
Artem Kozlovskiy,
Maxim Zdorovets,
Denis Vinnik,
Svetlana Gudkova,
Egor Kaniukov,
Antonio Sergio B. Sombra,
Di Zhou,
Rajshree B. Jotania,
Charanjeet Singh,
Sergei Trukhanov,
Alex Trukhanov
Affiliations
Tatiana Zubar
Laboratory of Magnetic Films Physics, Scientific-Practical Materials Research Centre of National Academy of Sciences of Belarus, 220072 Minsk, Belarus
Valery Fedosyuk
Laboratory of Magnetic Films Physics, Scientific-Practical Materials Research Centre of National Academy of Sciences of Belarus, 220072 Minsk, Belarus
Daria Tishkevich
Laboratory of Magnetic Films Physics, Scientific-Practical Materials Research Centre of National Academy of Sciences of Belarus, 220072 Minsk, Belarus
Oleg Kanafyev
Laboratory of Magnetic Films Physics, Scientific-Practical Materials Research Centre of National Academy of Sciences of Belarus, 220072 Minsk, Belarus
Ksenia Astapovich
Laboratory of Magnetic Films Physics, Scientific-Practical Materials Research Centre of National Academy of Sciences of Belarus, 220072 Minsk, Belarus
Artem Kozlovskiy
The Institute of Nuclear Physics, Almaty 050032, Kazakhstan
Maxim Zdorovets
The Institute of Nuclear Physics, Almaty 050032, Kazakhstan
Denis Vinnik
Laboratory of Single Crystal Growth, South Ural State University, 454080 Chelyabinsk, Russia
Svetlana Gudkova
Laboratory of Single Crystal Growth, South Ural State University, 454080 Chelyabinsk, Russia
Egor Kaniukov
Laboratory of Single Crystal Growth, South Ural State University, 454080 Chelyabinsk, Russia
Antonio Sergio B. Sombra
Department of Physics, Federal University of Ceara, 60-455-970 Fortaleza, Brazil
Di Zhou
Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Rajshree B. Jotania
Department of Physics, Electronics and Space Science, Gujarat University, Ahmedabad 380009, India
Charanjeet Singh
School of Electronics and Electrical Engineering, Lovely Professional University, Phagwara 144411, India
Sergei Trukhanov
Laboratory of Magnetic Films Physics, Scientific-Practical Materials Research Centre of National Academy of Sciences of Belarus, 220072 Minsk, Belarus
Alex Trukhanov
Laboratory of Magnetic Films Physics, Scientific-Practical Materials Research Centre of National Academy of Sciences of Belarus, 220072 Minsk, Belarus
Nanostructured NiFe film was obtained on silicon with a thin gold sublayer via pulsed electrodeposition and annealed at a temperature from 100 to 400 °C in order to study the effect of heat treatment on the surface microstructure and mechanical properties. High-resolution atomic force microscopy made it possible to trace stepwise evolving microstructure under the influence of heat treatment. It was found that NiFe film grains undergo coalescence twice—at ~100 and ~300 °C—in the process of a gradual increase in grain size. The mechanical properties of the Au/NiFe nanostructured system have been investigated by nanoindentation at two various indentation depths, 10 and 50 nm. The results showed the opposite effect of heat treatment on the mechanical properties in the near-surface layer and in the material volume. Surface homogenization in combination with oxidation activation leads to abnormal strengthening and hardening-up of the near-surface layer. At the same time, a nonlinear decrease in hardness and Young’s modulus with increasing temperature of heat treatment characterizes the internal volume of nanostructured NiFe. An explanation of this phenomenon was found in the complex effect of changing the ratio of grain volume/grain boundaries and increasing the concentration of thermally activated diffuse gold atoms from the sublayer to the NiFe film.
