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B4C/CeB6 Composite Ceramic Prepared by Spark Plasma Sintering Technology
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National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology,,National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology,,National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology,,National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology,,Capital Aerospace Machinery Company

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TB332

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    Abstract:

    Dense B4C matrix composites were synthesized by spark plasma sintering (SPS) process using CeO2 powders as the sintering aid. The effects of CeO2 on densification and properties of B4C were studied, and compared those with sample without additive. X-ray diffraction and transmission electron microscopy was employed to examine the phase and microstructure of the composites respectively. The results indicate that the addition of CeO2 powder can significantly improve the sintering propertyof B4C. The relative density of samples increased because of the existence of generated CeB6 between B4C grains. CeO2 content ranged from 1 wt.% to 8 wt.%. The specimen with 4 wt.% CeO2 sintered at 1750℃under a pressure of 35 MPa exhibited relative density of 96.7% and Rockwell hardness of 90.7HRA. Key words: boron carbide; cerium hexaboride; ceriumoxide; SPS; densification

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[Sun Chuan, Li Yunkai, Wang Yunfei, Guo Jianbin, Jiang Quanzhen. B4C/CeB6 Composite Ceramic Prepared by Spark Plasma Sintering Technology[J]. Rare Metal Materials and Engineering,2016,45(8):2071~2074.]
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History
  • Received:July 09,2014
  • Revised:October 09,2014
  • Adopted:November 20,2014
  • Online: October 09,2016
  • Published: