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Al2O3/Al2O3–ZrO2（3Y）层状纳米陶瓷复合材料的显微结构及弯曲强度

ISSN号：0454-5648
期刊名称：《硅酸盐学报》
时间：0
分类：TQ174[化学工程—陶瓷工业;化学工程—硅酸盐工业]
作者机构：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州730000
相关基金：国家自然科学基金资助项目（50902132,51175493）;中国科学院“西部之光”人才培养计划项目（2010）;甘肃省科技计划项目（1107RJYA043）

关键词：氧化铝, 氧化锆, 层状复合材料, 显微结构, 力学性能, alumina , zirconia , laminated composite , microstructure , mechanical property

中文摘要：

为优化Al2O3层状复合材料的制备工艺及力学性能,选用不同初始粉体为原料制备了系列Al2O3/Al2O3-ZrO2（3Y）层状复合材料。借助X射线衍射、冷场发射扫描电镜和万能试验机等手段,系统考察了粉体结构和形貌对层状复合材料显微结构和性能的影响。结果表明：初始粉体的颗粒尺寸及尺寸分布会显著影响层状复合材料的显微结构及力学性能,以球磨微-纳米复合粉体为原料制备的层状复合材料具有最佳的力学性能,其抗弯强度和断裂功分别可达740MPa及3892J.m^-2。同时,材料具有较高的层间结合强度,平行于层方向的抗弯强度高达436MPa。

英文摘要：

TheAl_2O_3/Al_2O_3-ZrO_2（3Y） laminated composites were prepared with different starting powders to optimize the preparation process and mechanical properties. The influence of phase struc- ture and morphology of powders on microstructure and properties of laminated composites were inves- tigated via X-ray diffraction （XRD）, field emission scanning electron microscope （FESEM） and mate- rial test system （DY-35）. The results show that the particle size and the size distribution of starting powders significantly affect the microstructure and mechanical properties of the laminated composites. The laminated composites with the best mechanical properties and microstructure, which use the mi- cro/nano-sized powders as starting powders, the bending strength and work of fracture are about 740MPa and 3892J ·m^- 2, respectively. In addition, the bending strength in the parallel direction of 436MPa can be achieved, which indicate that the composites with better bonding strength.