文献类型：期刊文献

英文题名：Preparation and properties of lanthana doped ZTA ceramics with plate-like crystals by microwave sintering

作者：Lu, H. -X.[1];Cai, Y.[1];He, M.[1];Fan, B. -B.[1];Zhang, L. -W.[1,2];Chen, D. -L.[1];Wang, H. -L.[1];Yang, D. -Y.[1];Xu, H. -L.[1];Zhang, R.[1,3]

第一作者：Lu, H. -X.

通讯作者：Lu, HX[1]

机构：[1]Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China;[2]Xinxiang Univ, Xinxiang 453003, Peoples R China;[3]Zhengzhou Inst Aeronaut Ind Management, Zhengzhou 450015, Peoples R China

第一机构：Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China

通讯机构：[1]corresponding author), Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China.

年份：2012

卷号：16

期号：6

起止页码：406-412

外文期刊名：MATERIALS RESEARCH INNOVATIONS

收录：;EI(收录号：20125215838810);Scopus(收录号：2-s2.0-84876804772);WOS:【SCI-EXPANDED(收录号:WOS:000311940300006)】；

基金：The authors would say thanks for the sponsor of the National Natural Science Foundation of China under grant no. 40872102 and the sponsor of Xinxiang Technical Bureau under grant no. 09G047.

语种：英文

外文关键词：ZTA; Microwave sintering; Plate-like crystals; Toughening

摘要：Lanthana doped zirconia toughened alumina (ZTA) ceramics with in situ formation of plate-like crystals have been prepared by microwave sintering derived from ZrOCl2 center dot 8H(2)O, Al(NO3)(3)center dot 9H(2)O and La(NO3)(3)center dot 6H(2)O. Samples were detected for phase analysis by X-ray diffraction, and the microstructure was examined using SEM. In addition, the sintering behaviour and mechanical properties (hardness and fracture toughness) of the ZTA material were investigated. Results show that LaAl11O18 plate-like crystals are formed in situ in the ZTA matrix when a certain amount of La2O3 is added, and the quantity, size, dispersion degree and crystallite growth of LaAl11O18 crystals are greatly influenced by microwave sintering. Compared to traditional sintering, samples obtained by microwave sintering possess improved performances. The optimal mechanical properties are achieved by doping of 1.5 mol.-%La2O3, with fracture toughness and Vickers hardness being 7.1 MPa m(1/2) and 17.2 GPa respectively.