The Microstructure and Mechanical Behavior Evaluation of Ce-TZP/Al_(2)O_(3)Nanocomposites  

作　　者：YANGGang LIJun-chu WANGGao-chao M.Yashima MINGSi-lin YUJi-liang 

机构地区：[1]DepartmentofMaterialsScienceandEngineering,NanchangInstituteofAeronauticalTechnology,Nanchang,China [2]MaterialsandStructuresLaboratory,TokyoInstituteofTechnology,Yokohama226,Japan

出　　处：《材料热处理学报》2004年第5期139-142,共4页Transactions of Materials and Heat Treatment

基　　金：supports from Educational Fund of Jiangxi province(DB200201009);the Fund of Materials Science and Engineering Center of Jiangxi Province(KG200201020),China are highly appreciated.

摘　　要：Ce-TZP/Al2O3 nanocomposites were prepared from mixture of self-made Ce-TZP nanometer powder and commercial A12O3 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 A12O3 grain and on the A12O3 grain boundary.Ce-TZP/Al2O3 nanocomposites were prepared from mixture of self-made Ce-TZP nanometer powder and commercial A12O3 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 A12O3 grain and on the A12O3 grain boundary.

关 键 词：显微结构 纳米复合物 机械特征 韧化 热处理 Ce-TZP/Al2O3 

分 类 号：TG166.3[金属学及工艺—热处理]