Al_2O_3(YAG)/LaPO_4层状陶瓷复合材料研究  

Preparation of Al_2O_3(YAG)/LaPO_4 Laminated Ceramics Composites

作　　者：仝建峰[1] 陈大明[1] 刘晓光[1] 李宝伟[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《航空材料学报》2006年第3期163-167,共5页Journal of Aeronautical Materials

摘　　要：选择A l2O3(YAG)作为基体片层材料,LaPO4作为界面层材料,采用凝胶注模成型技术制备出基体层材料的坯片,然后在基体层坯片上采用浸渍或喷涂工艺附着界面层材料,最后将坯片叠置于模具中热压烧结。制备的陶瓷复合材料微观结构均匀,基体片层厚度为110~150μm,界面层厚度为10~30μm,实测层厚比为11。重点研究工艺参数及界面层成分对层状陶瓷复合材料室温性能的影响。结果表明,氧化物基层状陶瓷复合材料的抗弯强度比基体材料略有下降,但室温断裂韧性达到了13.52MPa.m1/2,是基体材料断裂韧性的3倍。对比氧化物基层状陶瓷复合材料与基体材料在断裂过程中裂纹扩展路径的差异。In the present work,aqueous gelcasting-hot pressing technique to prepare oxide matrix laminated ceramic composites by(using) Al_2O_3(YAG) as matrix layers and LaPO_4 as interfacial layers.The composites with about 110μm matrix layers and 10μm interfacial layers were prepared.The effects of content LaPO_4 and procedure parameters of hot-pressing on properties of oxide matrix laminated ceramic composites were investigated.The results show that the bending strength of oxide matrix laminated ceramics decreases ...

关 键 词：氧化铝 钇铝石榴石 磷酸镧 层状陶瓷 复合材料 

分 类 号：TB333[一般工业技术—材料科学与工程]