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Hot‐Pressed ZrB 2 Ceramics With Composite Additives of Zr and B 4 C
Author(s) -
Wang XinGang,
Guo WeiMing,
Kan YanMei,
Zhang GuoJun
Publication year - 2010
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201000012
Subject(s) - materials science , microstructure , ceramic , zirconium diboride , composite number , composite material , hot pressing , molar ratio , biochemistry , chemistry , catalysis
This work pointed out a new approach to get dense ZrB 2 ceramics by forming refractory second phases through adding reactive composite additives. With the combination of Zr and B 4 C additives at a 3:1 molar ratio, the densification, microstructure, and mechanical properties of hot‐pressed ZrB 2 ceramics were investigated. The Zr reacted with B 4 C at relatively low temperature of 1400 °C to form the secondary ultra‐high‐temperature ZrB 2 and ZrC phases with high sinterability, which would be beneficial to improve the densification and maintain the high‐temperature properties of ZrB 2 ceramics. For comparison, the separate effects of B 4 C or Zr additive on densification and microstructures of ZrB 2 ceramics were also investigated.