A novel development of ZrB2/ZrO2 functionally graded ceramics for ultrahigh-temperature application
A novel development of ZrB2/ZrO2 functionally graded ceramics for ultrahigh-temperature application
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DOI：
10.1016/j.scriptamat.2008.08.014
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发表时间：
2008-12
影响因子：
6
通讯作者：
Xinghong Zhang;Weijie Li;C. Hong;W. Han;Jiecai Han
中科院分区：
文献类型：
--
作者：
Xinghong Zhang;Weijie Li;C. Hong;W. Han;Jiecai Han
采用放电等离子烧结法制备了ZrB 2/ZrO 2功能梯度陶瓷。1800°C烧结的ZrB 2/ZrO 2 FGC获得了更致密的梯度显微组织和“强”界面。由于ZrO 2的相变，ZrB 2/ZrO 2 FGC的韧性从富ZrB 2层的1.5MPam1/2提高到富ZrO 2层的1.10MPam1/2。进一步研究了烧结温度对ZrB 2/ZrO 2 FGC韧性的影响。
ZrB2/ZrO2functionally graded ceramics (FGCs), newly developed for ultrahigh-temperature application, were prepared by spark plasma sintering. Denser graded microstructure as well as a “strong” interface were achieved for ZrB2/ZrO2FGC sintered at 1800°C. Due to the phase transformation of ZrO2, the toughness of ZrB2/ZrO2FGCs was increased from ∼5MPam1/2for the ZrB2-rich layer to ∼10MPam1/2for the ZrO2-rich layer. The effect of sintering temperature on the toughness of ZrB2/ZrO2FGCs was further investigated.