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 ℃.
