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Volume 34 Issue 3
Jun 2020
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Chinese Journal of High Pressure Physics  > 2020  >  34(3): 034101.
LING Xuyu, LIU Fusheng, WANG Yigao. Influence of Initial Porosity on Shock Chemical Reaction of Nibium-Silicon Powder Mixture[J]. Chinese Journal of High Pressure Physics, 2020, 34(3): 034101. doi: 10.11858/gywlxb.20190851
Citation: LING Xuyu, LIU Fusheng, WANG Yigao. Influence of Initial Porosity on Shock Chemical Reaction of Nibium-Silicon Powder Mixture[J]. Chinese Journal of High Pressure Physics, 2020, 34(3): 034101. doi: 10.11858/gywlxb.20190851
shu

Influence of Initial Porosity on Shock Chemical Reaction of Nibium-Silicon Powder Mixture

doi: 10.11858/gywlxb.20190851
  • 1.

    Institute of High Pressure and High Temperature Physics, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

  • 2.

    Department of Applied Physics, College of Electrical and Information Engineering, Southwest University for Nationalities, Chengdu 610041, Sichuan, China

  • Received Date: 30 Oct 2019
  • Rev Recd Date: 15 Nov 2019
    Abstract
  • By employing the two-stage light gas gun and flyer impact technology, the impact recovery experiments of nibium-silicon powder mixtures with different initial porosity at high impact intensity were achieved. The recycled products were characterized to investigate the effect of porosity on the impact chemical reaction of nibium-silicon powder at high impact strength. The results showed that the sample with low porosity (10%) was hardly reacted; When the porosity is 20%, the nibium-silicon powder experienced a partial chemical reaction to form a NbSi2 compound; As the porosity was increased to 35%, a complete reaction has occurred to generate a Nb5Si3 intermetallic compound under the same impact strength (the flyer velocity about 2.35 km/s). Such results have shown that the complete reaction in the powder reactant of high-porosity powder mixture is mainly due to the high temperature generated by the pore collapse.

     

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