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Effect of cooling regime on structure of entropy-stabilized oxides (MgNiCoCuZn)O
Russian version
DOI: 10.61011/PSS.2023.08.56573.145
Vakhrushev S. B. 1, Naberezhnov A. A. 1, Sumnikov S. V. 2, Varatharaja N. 3,4, Lalith K. B. 3,4, Kumar R. 3,4
1Ioffe Institute, St. Petersburg, Russia
2Frank Neutron Physics Laboratory, Joint Nuclear Research Institute, Dubna, Moscow oblast, Russia
3Laboratory for High Performance Ceramics, Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras (IIT Madras), Chennai, India
4Ceramic Technologies Group, Centre of Excellence in Materials and Manufacturing for Futuristic Mobility, Indian Institute of Technology, Madras (IIT Madras), Chennai, India
Email: s.vakhrushev@mail.ioffe.ru, alex.nabereznov@mail.ioffe.ru, sumnikovsv@gmail.com, varatharajanallathambi@gmail.com, lalith.2k6@gmail.com, nvrk@iitm.ac.in
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The effect of various cooling regimes on the evolution of the crystal structure of entropy- stabilized oxides (MgNiCoCuZn)O has been studied using a high-resolution time-of-flight neutron Fourier diffractometer. It has been established that cooling in a furnace at a rate of 1, 2, and 5 K/min leads not only to the segragation of a part of copper oxide into a separate phase, but also to nanostructuring of both the main matrix and CuO. The characteristic sizes of the formed nanoparticles are determined. It is shown that the expected rhombohedral or tetragonal distortions due to the possible Jahn-Teller effect are not observed in these samples. Keywords: entropy-stabilized oxides, neutron diffraction, crystal structure, profile analysis. DOI: 10.61011/PSS.2023.08.56573.145
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