Aqueous Gelcasting and Pressureless Sintering of Zirconium Diboride Ceramics |
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| Authors: | Jie Yin Zhaoquan Zhang Zhengren Huang Hui Zhang Yongjie Yan Xuejian Liu Yan Liu Dongliang Jiang |
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| Affiliation: | 1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, , Shanghai, 200050 China;2. University of the Chinese academy of sciences, , Beijing, 100039 China |
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| Abstract: | Dense (97.3%) zirconium diboride (ZrB2) ceramics were obtained via gelcasting and pressureless sintering. Four wt% B4C was used as sintering aid. ZrB2, SiC, and B4C can codisperse well in the alkaline region, using a polyacrylate dispersant. Compared with monolithic ZrB2 (Z), the mechanical properties of ZrB2‐SiC (ZS) were enhanced. The Vickers hardness and fracture toughness of ZS were (13.1 ± 0.6) GPa and (2.5 ± 0.4) MPa m1/2, respectively. |
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