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Volume 40 Issue 1
Feb.  2022
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JIANG Hong-xiang, SONG Yan, ZHAO Lei, HE Jie, ZHAO Jiu-zhou, ZHANG Li-li. Preparation and microstructure evolution of TiB2/Al composite powders by gas atomization method[J]. Powder Metallurgy Technology, 2022, 40(1): 33-39. DOI: 10.19591/j.cnki.cn11-1974/tf.2021030039
Citation: JIANG Hong-xiang, SONG Yan, ZHAO Lei, HE Jie, ZHAO Jiu-zhou, ZHANG Li-li. Preparation and microstructure evolution of TiB2/Al composite powders by gas atomization method[J]. Powder Metallurgy Technology, 2022, 40(1): 33-39. DOI: 10.19591/j.cnki.cn11-1974/tf.2021030039
shu

Preparation and microstructure evolution of TiB2/Al composite powders by gas atomization method

  • 1.

    Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

  • 2.

    School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

  • 3.

    School of Mechanical Engineering, Liaoning Petrochemical University, Fushun 113001, China

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  • Corresponding author:

    JIANG Hong-xiang, E-mail: hxjiang@imr.ac.cn (JIANG H X)

    ZHAO Jiu-zhou, jzzhao@imr.ac.cn (ZHAO J Z)

  • Received Date: March 30, 2021
  • Accepted Date: March 30, 2021
  • Available Online: May 16, 2021
    Graphical Abstract
    • Abstract
  • The TiB2/Al composite ingot was prepared by the fluoride salt reaction method, and the TiB2/Al composite powders were prepared by the high pressure gas atomization. The structures and properties of the composite ingot and powders were characterized by metallographic microscope, scanning electron microscope, X-ray diffractometer, and particle size distribution instrument. The results demonstrate that, the solubility product of TiB2 in Al melt is much smaller than that of the TiAl3 and AlB2 phases in the experiment condition, the change of Gibbs free energy caused by the precipitation of TiB2 from Al melt is more negative than that caused by the precipitation of TiAl3 or AlB2 from Al melt. The TiB2/Al composite ingot and powders are mainly composed of α-Al matrix and TiB2 phase. The TiB2 particles in the TiB2/Al composite powders prepared by gas atomization have nano-scale, and uniformly disperse in the Al matrix, no obvious segregation phenomenon is observed. The size distribution of the TiB2/Al composite powders exhibits a normal state in the range of 10~100 μm. The powder yield with the particle size between 10~70 μm is 81.1%, the yield for the particle larger than 70 μm is 12.6%, and that less than 10 μm is 6.3%.
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    • References (19)
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