| The Microstructure and Mechanical Behavior Evaluation of Ce-TZP／Al2O3 Nanocomposites |
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| 作者姓名： | YANGGang LIJun-chu WANGGao-chao M.Yashima MINGSi-lin YUJi-liang |
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| 作者单位： | [1]DepartmentofMaterialsScienceandEngineering,NanchangInstituteofAeronauticalTechnology,Nanchang,China [2]MaterialsandStructuresLaboratory,TokyoInstituteofTechnology,Yokohama226,Japan |
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| 基金项目： | Educational Fund of Jiangxi province，江西省海洋科学工程中心资助项目 |
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| 摘 要： | Ce-TZP/Al2O3 nanocomposites were prepared from mixture of self-made Ce-TZP nanometer powder and commercial Al2O3 powder by hot-pressing method. Influences of nanometer ZrO2 particles on the mechanical properties and microstructure of Ce-TZP/Al2O3 ceramics were investigated. Meanwhile, t→m transformation toughening mechanism was investigated by x-ray diffractometry (XRD) method, and deflection of samples under applied stress were recorded too. The results show that when the percentage of ZrO2 was 20%, the mechanical properties and microstructures of materials were preferential. Additionally, TEM observation show that dislocation structures form both in the Al2O3 grain and on the Al2O3 grain boundary.
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| 关 键 词： | 显微结构 纳米复合物 机械特征 韧化 热处理 Ce-TZP／Al2O3 |
The Microstructure and Mechanical Behavior Evaluation of Ce-TZP/Al_2O_3 Nanocomposites |
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| YANGGang LIJun-chu WANGGao-chao M.Yashima MINGSi-lin YUJi-liang.The Microstructure and Mechanical Behavior Evaluation of Ce-TZP/Al_2O_3 Nanocomposites[J].Transactions of Materials and Heat Treatment,2004,25(5):139-142. |
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| Authors: | YANG Gang LI Jun-chu WANG Gao-chao MYashima MING Si-lin YU Ji-liang |
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| Affiliation: | 1. Department of Materials Science and Engineering, Nanchang Institute of Aeronautical Technology,Nanchang, China
2. Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226, Japan |
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| Abstract: | Ce-TZP/Al2O3 nanocomposites were prepared from mixture of self-made Ce-TZP nanometer powder and commercial Al2O3 powder by hot-pressing method. Influences of nanometer ZrO2 particles on the mechanical properties and microstructure of Ce-TZP/Al2O3 ceramics were investigated. Meanwhile, t→m transformation toughening mechanism was investigated by x-ray diffractometry (XRD) method, and deflection of samples under applied stress were recorded too. The results show that when the percentage of ZrO2 was 20%, the mechanical properties and microstructures of materials were preferential. Additionally, TEM observation show that dislocation structures form both in the Al2O3 grain and on the Al2O3grain boundary. |
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| Keywords: | nanocomposite mechanical behavior strengthening and toughening hot-pressing |
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