Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Preparation of Al_2O_3-YAG Composite by the Heterogeneous Precipitation Method

WANG Hong-Zhi; GAO Lian; LI Wei-Qun(State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute ofCeramics, Chinese Academy of Sciences, Shanghai 200050, China)  
Zeta potential of YAG powder was measured, and well-dispersed YAG aqueous sus-pension could be obtained through regulating pH value. Al_2O_3-YAG composite powder containinguniformly distributed YAG was prepared by using the heterogeneous precipitation method. Sintered bodies were gotten by hot-pressing, and addition of YAG influenced little on sintering temperature. Bending strength and fracture toughness of Al_2O_3-5vol%YAG composite were 485MPaand 4.2MPa·m~1/2 respectively. Both were higher than those of monolithic Al_2O_3 ceramics, andthe reliability of values was also better than that of Al_2O_3 ceramics. Through TEM observa-tion, it could be seen that YAG particles were uniformly distributed throughout materials. Itindicated that Al_2O_3-YAG composite with good YAG dispersion could be obtained by using theheterogeneous precipitation method.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved