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Volume 26 Issue 7
Jul.  2019
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文章导航 >  矿物冶金与材料学报（英文）  > 2019  >  26(7): 908-914
Betül Kafkaslıoğlu Yıldız, Hüseyin Yılmaz, and Yahya Kemal Tür, Influence of nickel addition on the microstructure and mechanical properties of Al2O3-5vol%ZrO2 ceramic composites prepared via precipitation method, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 908-914. https://doi.org/10.1007/s12613-019-1792-y
Cite this article as:
Betül Kafkaslıoğlu Yıldız, Hüseyin Yılmaz, and Yahya Kemal Tür, Influence of nickel addition on the microstructure and mechanical properties of Al2O3-5vol%ZrO2 ceramic composites prepared via precipitation method, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 908-914. https://doi.org/10.1007/s12613-019-1792-y
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研究论文

Influence of nickel addition on the microstructure and mechanical properties of Al2O3-5vol%ZrO2 ceramic composites prepared via precipitation method

  • Department of Materials Science and Engineering, Gebze Technical University, 41400 Gebze, Kocaeli, Turkey

  • 通讯作者:

    Betül Kafkaslıoğlu Yıldız    E-mail: bkafkaslioglu@gtu.edu.tr

  • The aim of this work was to investigate the microstructure and mechanical properties of 1vol%-Ni-added yttria-stabilized zirconia (YSZ) toughened alumina composites. First, Ni powders were heterogeneously precipitated in an alumina-zirconia powder mixture suspended in water; the prepared specimens were then pressureless sintered at 1550℃/2 h in a 90vol%Ar/10vol% H2 atmosphere. The structure of phases and microstructure of the composites were characterized by X-ray diffraction and scanning electron microscopy, respectively. Mechanical characterization of the specimens was carried out through Vickers hardness, Vickers indentation toughness, and three-point flexural bending tests. The fine Ni particles were homogeneously dispersed throughout the alumina matrix because of the employed processing method. Furthermore, hardness and toughness values were found to increase by 8% and 50%, respectively, with Ni addition, whereas the relative densities and flexural strength values were found to remain unchanged.
    • Research Article

    Influence of nickel addition on the microstructure and mechanical properties of Al2O3-5vol%ZrO2 ceramic composites prepared via precipitation method

    + Author Affiliations
      Abstract
    • The aim of this work was to investigate the microstructure and mechanical properties of 1vol%-Ni-added yttria-stabilized zirconia (YSZ) toughened alumina composites. First, Ni powders were heterogeneously precipitated in an alumina-zirconia powder mixture suspended in water; the prepared specimens were then pressureless sintered at 1550℃/2 h in a 90vol%Ar/10vol% H2 atmosphere. The structure of phases and microstructure of the composites were characterized by X-ray diffraction and scanning electron microscopy, respectively. Mechanical characterization of the specimens was carried out through Vickers hardness, Vickers indentation toughness, and three-point flexural bending tests. The fine Ni particles were homogeneously dispersed throughout the alumina matrix because of the employed processing method. Furthermore, hardness and toughness values were found to increase by 8% and 50%, respectively, with Ni addition, whereas the relative densities and flexural strength values were found to remain unchanged.
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