Reactive Phenomenon between Molten Ti and Al2O3/Y2O3/ZrO2 Composites

• Main Author: 陳柏錡
• Other Authors: 林健正
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/96236918350016753140

碩士 === 國立交通大學 === 材料科學與工程學系 === 99 === Various Al2O3/Y2O3/ZrO2 as sintering sample was reacted with titanium at 1700 °C/2 hr in argon. Analyzing the microstructure of the reaction interface was characterized with XRD, SEM/EDS, and TEM/EDS after reaction. There were forming TiAl Alloys on Ti side after diffusion reaction, and the reactions were more violent with the Al2O3 content increase, so the phase transited to Ti2ZrAl by Zr took Ti place. So many compounds be observed, including ZrO2, TiAl, Y3Al5O12(YAG), YAlO3, Y2O3, Al3Zr, etc. When Al2O3 content exceed the percolation threshold, the interconnecting network would be formed. Due to Ti diffused into the ceramics deeply by this network, the microstructure different from the other specimens. In four groups with the titanium melt diffusion reaction, the reaction in the diffusion process that YAG has an important role, it will be specifically discussed YAG and Ti melt diffusion reaction with the same temperature and time.