Fabrication And Characterization Of Carbon Fiber / Titanium Silicon Carbide / Titanium Carbide Composites

• Main Authors: Chen, Kuanting, 陳冠廷
• Other Authors: Lee, Koujung
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/25271834825448994282

碩士 === 義守大學 === 材料科學與工程學系 === 100 === The purpose of this study is to explore the microstructure and composition of titanium silicon carbide/titanium carbide powders fabricated by different process parameter and further compare the properties of those composites prepared through different processes. Firstly, Ti/Si/C/Al pouder were mixed and sintered at different temperature to prepare titanium silicon carbide/titanium carbide powder with different composition and processing parameter. The carbon fiber/titanium silicon carbide/titanium carbide composites were prepared by two different processes. One is the powder process and the other one is the needle punching method combined with vacuum liquid impregnation process. The powder process is the process of staging a series of mixing and hot pressing, the homemade titanium silicon carbide/titanium carbide powders, carbon fiber and binder, and high temperature treatment to make composites. Whereas the other process adopts the needle punched carbon fiber as the preform. The preforms were then impregnated with liquid titanium silicon carbide/titanium carbide slurry and followed by hot pressure to make the composites. The results indicate that different sintering temperature and holding time would affect the composition of titanium silicon carbide/titanium carbide powders. The proportion of titanium silicon carbide in titanium silicon carbide/titaunium carbide powders with holding time of 0.5 hour at 1550℃ is highest. The composites powder made with the highest proportion of titanium silicon carbide show the best electric conductivity, heat conductivity, and wear performance among those composites made by other composition powder. Moreover, the specimens made with higher proportion of titanium carbide show better mechanical properties. It is worth noting that the higher proportion of titanium silicon carbide in the titanium silicon carbide/titanium carbide impregnant could also enhance the properties of specimen fabricated by needle-punching and liquid impregnation processes.