Formation of tough interlocking microstructure in ZrB_2—SiC-based ultrahigh-temperature ceramics by pressureless sintering
Formation of tough interlocking microstructure in ZrB_2—SiC-based ultrahigh-temperature ceramics by pressureless sintering
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DOI：
10.1557/jmr.2009.0274
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发表时间：
2009-07
影响因子：
2.7
通讯作者：
J. Zou;Guo‐Jun Zhang;Y. Kan
中科院分区：
文献类型：
--
作者：
J. Zou;Guo‐Jun Zhang;Y. Kan
以ZrB_2、SiC和WC粉末为原料，采用无压烧结法成功致密化了一种具有细长ZrB_2晶粒的自增强超高温陶瓷（UHTC）。与无压烧结ZrB_2-SiC陶瓷相比，由于其独特的互锁结构，该材料具有更高的强度（518 ± 10 MPa）和断裂韧性（6.5 ± 0.2 MPa m^1/2）。本工作为超高温超导材料的微观结构和力学性能的定制提供了一条新的途径。
A self-reinforced ultrahigh-temperature ceramic (UHTC) with elongated ZrB_2 grains has been successfully densified by pressureless sintering using commercially available ZrB_2, SiC, and WC powders as raw materials. Benefiting from the unique interlocking microstructure, this material had improved strength (518 ± 10 MPa) and higher fracture toughness (6.5 ± 0.2 MPa m^1/2) compared to ZrB_2—SiC ceramics prepared by pressureless sintering. This work provides a new route for tailoring the microstructure and mechanical properties of UHTCs.