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Aqueous Gelcasting and Pressureless Sintering of Zirconium Diboride Ceramics
Author(s) -
Yin Jie,
Zhang Zhaoquan,
Huang Zhengren,
Zhang Hui,
Yan Yongjie,
Liu Xuejian,
Liu Yan,
Jiang Dongliang
Publication year - 2013
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12120
Subject(s) - zirconium diboride , materials science , pressureless sintering , dispersant , ceramic , fracture toughness , sintering , composite material , zirconium , vickers hardness test , titanium diboride , metallurgy , dispersion (optics) , microstructure , physics , optics
Dense (97.3%) zirconium diboride (ZrB 2 ) ceramics were obtained via gelcasting and pressureless sintering. Four wt% B 4 C was used as sintering aid. ZrB 2 , SiC, and B 4 C can codisperse well in the alkaline region, using a polyacrylate dispersant. Compared with monolithic ZrB 2 (Z), the mechanical properties of ZrB 2 ‐SiC ( ZS ) were enhanced. The Vickers hardness and fracture toughness of ZS were (13.1 ± 0.6) GP a and (2.5 ± 0.4) MP a m 1/2 , respectively.