Microstructure and mechanical properties of ZrO2 (Y2O3)-Al2O3 nanocomposites prepared by spark plasma sintering
Microstructure and mechanical properties of ZrO2 (Y2O3)-Al2O3 nanocomposites prepared by spark plasma sintering
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DOI：
10.1016/j.partic.2011.05.002
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发表时间：
2012-06-01
期刊：
影响因子：
3.5
通讯作者：
Watanabe, Taku
中科院分区：
文献类型：
--
作者：
Li, Shufeng;Izui, Hiroshi;Watanabe, Taku
采用放电等离子烧结（SPS）技术制备了氧化锆（氧化钇）-氧化铝纳米复合陶瓷.一种粉末是市售的纳米复合材料粉末TZP-3 Y20 A，其由用20重量%氧化铝增强的3摩尔%氧化钇稳定的氧化锆（3-YSZ）组成，另一种用作对比，是常规的机械混合粉末3 YSZ-20 A，其是由3摩尔%氧化钇稳定的氧化锆粉末ZrO 2（3 Y）和20重量% α-氧化铝粉末制成的共混物。研究了烧结温度对复合材料的致密化、烧结行为、力学性能和显微结构的影响。结果表明，随着烧结温度的升高，材料的致密度增加，致密化程度提高，力学性能增强。与传统机械混合法制备的粉末相比，TZP-3 Y20 A纳米复合粉末易于烧结，具有良好的力学性能，其最大抗弯强度和断裂韧性分别为967 MPa和5.27 MPa m（1/2）。(C)2011年中国科学院颗粒学会、过程工程研究所。Elsevier B. V.出版，保留所有权利。
Zirconia (yttria)-alumina ceramic nanocomposites were fabricated from different powders by spark plasma sintering (SPS). One powder was a commercially available nanocomposite powder TZP-3Y20A, consisting of 3 mol% yttria-stabilized zirconia (3-YSZ) reinforced with 20 wt% alumina, and the other, used as a comparison, was a conventional mechanically mixed powder 3YSZ-20A, a blend made of 3 mol% yttria-stabilized zirconia powder ZrO2 (3Y) and 20 wt% alpha-alumir a powder. The effect of the sintering temperature on the densification, the sintering behavior, the mechanical properties and the microstructure of the composites was investigated. The results showed that the density increased with increasing sintering temperature, and thus, the mechanical properties were strengthened because of the increased densification. The nanocomposite powder TZP-3Y20A was easily sintered, and good mechanical properties were achieved as compared with the powder from the conventional mechanically mixed method, the maximum flexural strength and fracture toughness of which were 967 MPa and 5.27 MPa m(1/2), respectively. (C) 2011 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.