FABRICATION OF Ti/SiC MMCs BY VACUUM HOT PRESSING WITH AID OF HYDROGEN

查看全文 作　　者：C.H. Zhou;K. Yang and Y.X. Lu (Liaoning Key Lab for Hydrogen and Materich, Institute of Metal Research, The Chinese Academy of Sciences, Shenyan 110015, China) 出　　处：《Acta Metallurgica Sinica(English Letters)》索引1998年第11卷第4期,共6页 摘　　要：In order to alleviate the severe interface reaction, which is likely to occur during the fabrication of continuous SiC fiber reinforced titanium matrix composite, hydrogen was temporarily introduced in the fabrication to lower the consolidation temperature of Ti/SiC composites in the present work. Effects of different fabrication conditions, with or without hydrogen, on the bonding state and the matrix microstructure were investigated. In-situ hydrogenation method was found to larpely improve the interface bonding of the composite, and full consolidation could be achieved at 750 or even 700° C more than 100°C lower than the normal fabrication temperature of Ti/SiC composite, which consequently reduced the interfacial reaction layer between Ti matrix and SiC fiber. Different hydrogenation condition led to different matrix microstructure. In order to avoid the embrittling effect of residual hydrogen on the composite,Ti/SiC composite needs to be held in vacuum at the fabrication temperature for longer time after consolidation. 关 键 词：Ti/SiC composite HYDROGEN microstructure