Microstructure, Mechanical Properties, and Pyroconductivity of NiFe2O4 Composite Reinforced with ZrO2 Fibers
发布时间：2024-08-09
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- 所属单位：
- 冶金工程学院
- 发表刊物：
- Journal of Materials Engineering and Performance
- 关键字：
- 中文关键字：陶瓷基复合材料; 电导率; 热处理; 力学测试; ZrO2纤维，英文关键字：ceramic matrix composites; conductivity; heat trea
- 摘要：
- NiO-Fe2O3-ZrO2f composites were fabricated by a two-step sintering process. No phase transformation for ZrO2f was observed. The as-prepared NiO-Fe2O3-ZrO2f ceramic showed excellent mechanical properties because of the introduction of ZrO2 fiber. The values for both the bending strength and fracture strength of 3 wt.% ZrO2f-reinforced NiFe2O4 samples reached the maximum values of ~89.0 MPa and ~4.67 MPa m1/2, respectively, The toughness mechanism is mainly attributed to fibers’ fracture, crack deflection, fibers’ pull-out, and fibers’ debonding. The conductivity of ZrO2f-reinforced NiFe2O4 is dependent on temperature and ZrO2f content. When the electrolytic temperature is up to 950°C, the conductivity value of the sample reinforced with 4 wt.% ZrO2 fibers is 0.63 S/cm, which has been improved by 37.8% compared with the conductivity value of 0.45 S/cm for the un-doped samples. The main conductive mechanisms of ZrO2 fiber in the matrix are the one based on the substitution of Zr4+ ions to produce quasifree electrons, and the other based on oxygen ionic conducting mechanism.
- 备注：
- SCI/EI:20132216368483
- 合写作者：
- YihanLiu,GuangchunYao,ZhongshengHua,XiuliLo
- 第一作者：
- 杜金晶
- 论文类型：
- 期刊论文
- 卷号：
- 卷：22
- 期号：
- 期：6
- 页面范围：
- 页：1776–1782
- 是否译文：
- 否
- 发表时间：
- 2013-06-01