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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/043/0098

    • Keywords

       

      NiCrP alloy coating; thermal stability; high-temperature oxidation resistance; microstructure; crystallization behaviour.

    • Abstract

       

      Amorphous NiP and NiCrP alloy coatings were prepared on copper substrates by electrodeposition. The thermal stability of the obtained coatings were evaluated by the onset temperature of phase transformation identified with differential scanning calorimetry measurements, and their high temperature oxidation resistances were characterized by the oxidation kinetics curve and the oxidation activation energy. The mechanism of the doping effect of Cr element on crystallization temperature and oxidation resistance of the alloy coatings were discussed based on X-ray diffraction analysis. The results show that the crystallization temperature of NiP amorphous alloy was 344$^{\circ}$C, and the oxidation activation energy was calculated to be 1.54 $\times$ 103 J mol$^{−1}$. As for NiCrP alloy coating with a Cr content of 1.8 wt%, the crystallization temperature increased to 403.8$^{\circ}$C and the calculated oxidation activation energy was 3.53 $\times$ 104 J mol$^{−1}$, 2.29 times higher than theNiP coating. The remarkably enhanced high-temperature oxidation resistance of NiCrP alloy coating can be attributed to the compact metal oxide film formed on the surface.

    • Author Affiliations

       

      Y Q GUO1 J K YU1 H B YANG1 Q QIAO1 Q Y LI1 X C ZHAO1

      1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, People’s Republic of China

    • Dates

       
      Published
      25 March 2020
      Manuscript received
      30 July 2019
      Accepted
      20 January 2020
      Final version published online
      25 March 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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