Investigation of Microstructure of Al₂O₃/LaPO₄ Ceramic Composites  

作　　者：朱玉峰 刘家臣 刘海燕 杜海燕 

机构地区：[1]Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tianjin 300072 China

出　　处：《Journal of Rare Earths》2005年第S1期197-199,共3页稀土学报（英文版）

摘　　要：Layer structured LaPO_4 was added to Al_2O_3 ceramic matrix to improve the machinability of the composites. Microstructures of the Al_2O_3/LaPO_4 ceramic composites were studied at various sintering temperatures (1450, 1520, 1580, 1700 ℃) and different LaPO_4 contents (pure Al_2O_3, 30% LaPO_4, 50% LaPO_4, 70% LaPO_4, pure LaPO_4). Microstructures of the Al_2O_3/LaPO_4 composites are largely dependent on the LaPO_4 content and sintering temperature. X-ray diffraction analysis shows that LaPO_4 phase would not exist in the Al_2O_3/LaPO_4 composites when sintered above 1700 ℃.Layer structured LaPO_4 was added to Al_2O_3 ceramic matrix to improve the machinability of the composites. Microstructures of the Al_2O_3/LaPO_4 ceramic composites were studied at various sintering temperatures (1450, 1520, 1580, 1700 ℃) and different LaPO_4 contents (pure Al_2O_3, 30% LaPO_4, 50% LaPO_4, 70% LaPO_4, pure LaPO_4). Microstructures of the Al_2O_3/LaPO_4 composites are largely dependent on the LaPO_4 content and sintering temperature. X-ray diffraction analysis shows that LaPO_4 phase would not exist in the Al_2O_3/LaPO_4 composites when sintered above 1700 ℃.

关 键 词：MICROSTRUCTURE MACHINABLE LaPO_4 Al_2O_3 

分 类 号：TQ174.7[化学工程—陶瓷工业]