High-performance Al2O3 Composite Ceramics Modified with Short Rod-Shaped ZrO2 Particles

被引：1
作者：
Fang, Yihang [1 ]
Zhao, Xianrui [2 ]
Xia, Lingqin [1 ]
Chen, Guang [1 ]
Wu, Tao [1 ]
Wang, Ruiquan [1 ]
Zhang, Mengxian [3 ]
机构：
[1] Zhejiang Inst Mech & Elect Engn, Sch Addit Mfg, Hangzhou 310053, Peoples R China
[2] Jiangsu Maritime Inst, Sch Naval Architecture & Ocean Engn, Nanjing 211170, Peoples R China
[3] Jiujiang Univ, Jiangxi Prov Engn Res Ctr Mat Surface Remfg, Sch Mat Sci & Engn, Jiujiang 332005, Peoples R China
来源：
TRANSACTIONS OF THE INDIAN CERAMIC SOCIETY | 2023年 / 82卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Short rod-shaped ZrO2; Hydrothermal synthesis; Al2O3 composite ceramics; Mechanical properties; Strengthening mechanism; ZIRCONIA-TOUGHENED ALUMINA; MECHANICAL-PROPERTIES;
D O I：
10.1080/0371750X.2023.2231035
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, short rod-shaped monoclinic ZrO2 particles were synthesized from Zr(NO3)(4).5H(2)O, Y(NO3)(3) and KOH in a hydrothermal reaction. The reaction conditions, structure of the synthetic ZrO2 and effects of different concentrations of ZrO2 on the mechanical properties of Al2O3 composite ceramics were investigated. Dense monoclinic rod-shaped ZrO2 particles with rough surfaces were obtained when the hydrothermal reaction temperature was 180 degrees C, the reaction time was 24 h and the KOH concentration was 6 mol/L. Results from energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction spectroscopy (XRD) confirmed the structure and composition of the reaction product. Composite ceramics were prepared by hot press sintering the synthetic ZrO2 with Al2O3, and optimal values of mechanical properties were obtained for 7.5 wt% zirconia. The ZrO2 strengthened the Al2O3 composite ceramics by mechanisms that included reinforcement by fine grains, enhancement by rod-shaped ZrO2 particles and phase transformation toughening.
引用
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页码：246 / 255
页数：10
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