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Volume 29 Issue 3
Jul 2015
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Chinese Journal of High Pressure Physics  > 2015  >  29(3): 178-184.
ZHANG Yu, HE Duan-Wei, WANG Yong-Kun, LIU Yin-Juan, HU Yi, WANG Jiang-Hua. Reactive Sintering of B6O/TiB2 Composites at High Temperature and High Pressure[J]. Chinese Journal of High Pressure Physics, 2015, 29(3): 178-184. doi: 10.11858/gywlxb.2015.03.003
Citation: ZHANG Yu, HE Duan-Wei, WANG Yong-Kun, LIU Yin-Juan, HU Yi, WANG Jiang-Hua. Reactive Sintering of B6O/TiB2 Composites at High Temperature and High Pressure[J]. Chinese Journal of High Pressure Physics, 2015, 29(3): 178-184. doi: 10.11858/gywlxb.2015.03.003
shu

Reactive Sintering of B6O/TiB2 Composites at High Temperature and High Pressure

doi: 10.11858/gywlxb.2015.03.003

  • Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China

  • Received Date: 18 Mar 2015
  • Rev Recd Date: 27 Mar 2015
    Abstract
  • B6O/TiB2 composites were produced from B-TiO2 mixtures using "one step reactive sintering method" at high pressures between 4 and 5 GPa.The highest Vicker's hardness is 29 GPa for samples consisting of amorphous B and TiO2 (molar ratio:14.0:0.8).For samples consisting of crystal B and TiO2 (molar ratio:14.0:0.8) sintered at the condition of 5 GPa and 1 200 ℃ for 30 min, the highest Vicker's hardness is 32 GPa, and the ratio of densification is up to 99%.High pressure restrains the formation of large crystalline grains and promotes the synthesis of B6O, and reduces the sintering temperature comparing to that at atmospheric pressure.On the other hand, generated additional TiB2 and superfluous boron can improve the fracture toughness of the sintered samples.

     

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