Microstructure and mechanical properties of ZrO_2(Y_2O_3)-Al_2O_3 nanocomposites prepared by spark plasma sintering

作     者：Shufeng Li Hiroshi Izui Michiharu Okano Weihua Zhang Taku Watanabe 

作者机构：College of Science and TechnologyNihon University7-24-1NarashinodaiFunabashiChiba 274-8501Japan College of Science and TechnologyNihon University1-8-14KandasurugadaiChiyoda.Tokyo 101-8308Japan College of Materials Science and TechnologyXi'an University of Technology5 SouthJinhua RoadXi'anShaanxi 710048China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2012年第10卷第3期

页      面：345-351页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Zirconia aluminaNanocompositeSpark plasma sintering (SPS)Mechanical propertiesMicrohardnessFracture toughnessDensification 

摘      要：Zirconia （yttria）-alumina ceramic nanocomposites were fabricated from different powders by spark plasma sintering （SPS）. One powder was a commercially available nanocomposite powder TZP-3Y2OA, consisting of 3 mol% yttria-stabilized zirconia （3-YSZ） reinforced with 20wt% alumina, and the other, used as a comparison, was a conventional mechanically mixed powder 3YSZ-2OA, a blend made of 3 mol% yttria-stabilized zirconia powder ZrO2 （3Y） and 20 wt% ,x-alumina 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.