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    • Effect of thermal spray process on chemical composition, magnetic behaviour, structure and mechanical properties of coatings based on milled Fe, Co and Al$_2$O$_3$ powder

      A YOUNES N DILMI A BOUAMER

      Volume 43 Published: 10 February 2020 Article ID 0068

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/043/0068

    • Keywords

       

      FeCo/Al$_2$O$_3$ nanoparticle coating; mechanical alloying; thermal spraying; magnetic behaviour; structural and mechanical parameters.

    • Abstract

       

      Coated steel substrate by FeCo/Al$_2$O$_3$ nanoparticle with various Co concentrations realized by a thermal spraying process, preliminary powder alloy was elaborated by mechanical alloying technique for 20 h of milling time. The aims of this work are to study the effect of thermal spraying process and mechanical alloying on chemical composition, magnetic behaviour, structure and mechanical properties of coating. After mechanical alloying, the crystallite sizes of the powder were decreased from 18 to 7 nm and the lattice strains increased from 0.36 to 0.56%. This is due to the phenomenon of diffusion of cobalt in the iron lattice and the milling effect. After thermal spraying, many different phases appeared in the coating, such as Al$_2$FeO$_4$, CoAl$_2$O$_4$, CoFe and CoFe$_2$O$_4$. Magnetic behaviour was influenced by this change in the chemical composition of coating. The maximum saturation magnetization was found in Fe$_{40}$Co$_{20}$(Al$_2$O$_3$)$_{40}$ sprayed powder, however, the minimum coercivity was found in Fe$_{50}$Co$_{10}$(Al$_2$O$_3$)$_{40}$ sprayed powder. Mechanical properties’ parameters such as microhardeness andYoung’s modulus were enhanced by the change in chemical composition during mechanical alloying and thermal spraying process.

    • Author Affiliations

       

      A YOUNES1 2 N DILMI2 A BOUAMER1

      1. Research Center in Industrial Technologies (CRTI), PO Box 64, 16014, Cheraga, Algiers, Algeria
      2. Laboratory of Surface Treatment and Materials, University of Saad Dahleb, PO Box 270, 09000 Blida, Algeria,

    • Dates

       
      Published
      10 February 2020
      Manuscript received
      12 June 2019
      Accepted
      20 September 2019
      Final version published online
      10 February 2020

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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