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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/031/05/0801-0806

    • Keywords

       

      Carbon nanotubes; FeCoNi alloy; structure; magnetic properties; heat treatment

    • Abstract

       

      Fe46Co35Ni19/CNTs nanocomposites have been prepared by an easy two-step route including adsorption and heat treatment processes. We investigated the effect of heat treatment conditions on structure, morphology, nanoparticle sizes and magnetic properties of the Fe46Co35Ni19 alloy nanoparticles attached on the carbon nanotubes by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), energy-disperse X-ray spectroscopy (EDS) and vibrating sample magnetometer (VSM). When the reducing temperature changes from 300–450°С, a transition of the crystalline structure from bcc phase to 𝑓𝑐𝑐–𝑏𝑐𝑐 dual phase and an increase in particle size of Fe46Co35Ni19 nanoparticles together with a local maximum at 350°С are observed. Meanwhile, the saturation magnetization (𝑀s) for Fe46Co35Ni19 nanoparticles increases with the increase of reducing temperature and the coercivity (𝐻c) decreases rapidly with a local minimum at 350°С. When the reducing time (𝑡𝑟) changes from 2–5 h, bcc phase is predominant in the Fe46Co35Ni19 alloy particles. Both the particle size and 𝑀s have a maximum at 𝑡𝑟 = 3 h, and the 𝐻c reaches a maximum at 𝑡𝑟 = 4 h.

    • Author Affiliations

       

      H Q Wu1 D M Xu1 Q Wang1 Y Z Yao1 Q Y Wang1 G Q Su1

      1. College of Chemistry and Materials Science, Anhui Key Laboratory of Functional Molecular Solids, Anhui Normal University, Wuhu 241000, P. R. China

    • Dates

       
      Published
      October 2008
      Manuscript received
      5 December 2007
      Manuscript revised
      29 December 2007

  • 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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