Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《稀土学报(英文版)》 2014-05
Add to Favorite Get Latest Update

Sintering kinetics of YAG ceramics

HUANG Yihua;JIANG Dongliang;ZHANG Jingxian;CHEN Zhongmin;LIN Qingling;HUANG Zhengren;The State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences;  
Solid state reactive(SSR) sintering kinetics was observed for YAG ceramics. There were two densification stages in sintering process due to its reaction. After the first stage, samples began to expand, then, the second densification stage began. At a heating rate of 10 oC/min, the sample warped down and warped back to straight. The apparent activation energy of the first densification process was about 522 kJ/mol for the initial shrinkage of Al2O3 and Y2O3 mixed powder green-body, which increased in the following process due to the solid state reaction. In the second densification stage, synthesis reaction of YAG still worked. Green-bodies processed with higher heating rate got more shrinkage at the same temperature than lower heating rate green bodies. And its kinetic field diagram was abnormal, compared with that of other reported ceramics, such as Al2O3. It was found that the reaction of YAG provided positive effect to the sintering driving force. The apparent activation energy for densification of SSR YAG sintered in ArH5 atmosphere was 855 kJ/mol at temperature holding sintering. And the apparent activation energy for grain growth was 1053 kJ/mol.
【Fund】: Project supported by National Natural Science Foundation of China(50990301 51072210 51172263);; Science and Technology Commission of Shanghai Municipality(12ZR1451900)
【CateGory Index】: TQ174.1
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
Similar Journals
> China Foundry
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved