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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): 915-924
Harshpreet Singh, Muhammad Hayat, Hongzhou Zhang, Raj Das, and Peng Cao, Effect of TiB2 content on microstructure and properties of in situ Ti-TiB composites, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 915-924. https://doi.org/10.1007/s12613-019-1797-6
Cite this article as:
Harshpreet Singh, Muhammad Hayat, Hongzhou Zhang, Raj Das, and Peng Cao, Effect of TiB2 content on microstructure and properties of in situ Ti-TiB composites, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 915-924. https://doi.org/10.1007/s12613-019-1797-6
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研究论文

Effect of TiB2 content on microstructure and properties of in situ Ti-TiB composites

  • Department of Chemical and Materials Engineering, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand

  • Sir Lawrence Wackett Aerospace Research Centre, School of Engineering, RMIT University, GPO Box 2476, Melbourne VIC, Australia

  • 通讯作者:

    Muhammad Hayat    E-mail: m.hayat@auckland.ac.nz

    Peng Cao    E-mail: p.cao@auckland.ac.nz

  • This study determined the optimal concentration of titanium diboride (TiB2) particles for the development of in situ titanium-titanium boride (Ti-TiB) metal matrix composites (MMCs) prepared by a conventional powder metallurgy route to be used for industrial applications. The effect of concentration of TiB2 particles was studied by reinforcing TiB2 powder in different mass fractions (2wt%, 5wt%, 10wt%, and 20wt%) into pure Ti powder during the fabrication process. The MMCs were sintered at high temperatures under vacuum. The transmission electron microscopy (TEM) results revealed the formation of needle-shaped TiB whiskers, indicating that in situ reaction occurred during vacuum sintering of the powder compacts. All the composite samples had a high sintered density, and the hardness of the composites increased with an increase in the mass fraction of reinforcement. Mechanical and tribological properties such as flexural strength, impact, and wear properties were determined and found to be dependent on the mass fraction of the reinforcement. However, the mechanism for the in situ reaction needs further investigation by high-energy in situ X-ray diffraction techniques.
    • Research Article

    Effect of TiB2 content on microstructure and properties of in situ Ti-TiB composites

    + Author Affiliations
      Abstract
    • This study determined the optimal concentration of titanium diboride (TiB2) particles for the development of in situ titanium-titanium boride (Ti-TiB) metal matrix composites (MMCs) prepared by a conventional powder metallurgy route to be used for industrial applications. The effect of concentration of TiB2 particles was studied by reinforcing TiB2 powder in different mass fractions (2wt%, 5wt%, 10wt%, and 20wt%) into pure Ti powder during the fabrication process. The MMCs were sintered at high temperatures under vacuum. The transmission electron microscopy (TEM) results revealed the formation of needle-shaped TiB whiskers, indicating that in situ reaction occurred during vacuum sintering of the powder compacts. All the composite samples had a high sintered density, and the hardness of the composites increased with an increase in the mass fraction of reinforcement. Mechanical and tribological properties such as flexural strength, impact, and wear properties were determined and found to be dependent on the mass fraction of the reinforcement. However, the mechanism for the in situ reaction needs further investigation by high-energy in situ X-ray diffraction techniques.
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