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Journal of Inorganic Materials

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2010 , Vol. 25 >Issue 1: 87 - 90

DOI: https://doi.org/10.3724/SP.J.1077.2010.00087

Research Paper

Morphology Characteristics and Mechanical Properties of Nano/Micron Calcium Hexaboride Sintered Body

  • ZHANG Lin ,
  • MIN Guang-Hui ,
  • YU Hua-Shun
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  • (1. Key Laboratory for LiquidSolid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, China; 2. Mechanical Engineering Postdoctoral Research Station, Shandong University, Jinan250061, China)

Received date: 2009-04-27

  Revised date: 2009-06-30

  Online published: 2010-01-24

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Abstract

Nano/Micron Calcium Hexaboride (CaB6) composite ceramics with different CaB6 nanopowder additions were prepared under 1750℃, 32MPa for 5min in vacuum. Influences of CaB6 nanopowders on morphology and mechanical properties of sintered bodies were investigated. Composite ceramic with 10wt% CaB6 nanopowder addition has the highest compactness degree and mechanical properties, whose hardness, bending strength and fractural toughness are 92.6 HRA, 331.7MPa and 3.06MPa·m1/2, respectively, better than those of CaB6 ceramics without nanopowder adding or those of reinforced by Ni as sintering additive. The proper amount of nano-particles filled in the micron grain boundaries and the formation of “inner crystal” result in the improvement of compactness and mechanical properties for the CaB6 sintered body.

Key words： calcium hexaboride; nano/micron composite ceramic; vacuum hot-pressing; intragranular structure; mechanical property

Cite this article

ZHANG Lin , MIN Guang-Hui , YU Hua-Shun . Morphology Characteristics and Mechanical Properties of Nano/Micron Calcium Hexaboride Sintered Body[J]. Journal of Inorganic Materials, 2010 , 25(1) : 87 -90 . DOI: 10.3724/SP.J.1077.2010.00087

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