傅乐

副教授

入职时间:2019-03-21

所在单位:材料科学与工程学院

学历:博士研究生毕业

办公地点:中南大学校本部米塔尔楼302室

性别:男

联系方式:fule2019@csu.edu.cn

学位:博士学位

在职信息:在职

毕业院校:瑞典乌普萨拉大学

   
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A containerless melting-solidification strategy to fabricate ZrO2-Al2O3-SiO2 ternary ceramic composites containing crystalline and amorphous phases

发布时间:2025-02-16

点击次数:

DOI码:10.1016/j.ceramint.2025.02.161

发表刊物:Ceramics International

摘要:The limited flexibility in terms of chemical composition restricts the microstructure and property regulation possibilities of ZrO2-Al2O3 binary ceramic composites (BCCs). Therefore, it is significant to prepare ternary ceramic composites by introducing a third phase. In this study, a fixed proportion of amorphous SiO2 (30 mol%) was incorporated as the third phase to develop ZrO2-Al2O3-SiO2 ternary ceramic nanocomposites (TCNCs) with two distinct Zr/Al ratios. The TCNCs were fabricated using containerless aerodynamic levitation technology, which featured a large thermal gradient that would facilitate the formation of nano-eutectics. In samples with a Zr/Al ratio of 3:1, monoclinic ZrO2 was the sole crystalline phase. The Al element was present in either Al-O-Si or Al-O glass phase, depending on the processing temperature; In contrast, ZrO2-Al2O3 nano-eutectics were formed in samples with a Zr/Al ratio of 3:8, accompanied by the generation of mullite crystallites. The SiO2 phase functioned as an amorphous matrix. Vickers hardness of the TCNC with a Zr/Al ratio of 3:8 exhibited comparability to that reported for ZrO2-Al2O3 composites.

合写作者:Zihua Lei, Wenjun Yu, Mingxi Deng

第一作者:Le Fu*

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发表时间:2025-02-16

收录刊物:SCI

发布期刊链接:https://www.sciencedirect.com/science/article/pii/S0272884225008272

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