Fabrication of SiC / metal composite from bamboo bio-carbon

• Main Authors: Shih-Yu Lin, 林士育
• Other Authors: Yung-Jen Lin
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/57230690695873178588

碩士 === 大同大學 === 材料工程學系(所) === 94 === The purpose of this research is to fabricate porous silicon carbide from bamboo , and then to infiltrate 2024 aluminum alloy and copper to form ceramic / metal composites . The bamboo was first transformed into porous charcoal by carbonization in argon atmosphere . Proper proportion of Si was then reacted with porous charcoal to form porous SiC ceramic . Finally , under high temperature and inert atmosphere, melting metal ( Al-alloy and Cu ) were infiltrated into porous SiC by capillary force . In the case of infiltrating Al alloy for 4 hr , Al alloy was found inside the sample only when infiltrating temperatures were ≧900℃ . However , Al4C3 was formed if temperatures was 1050℃ . So 900℃ appeared to be a suitable temperature to infiltrate Al alloy . The amount of infiltrated Al-alloy increased as infiltration time increased . After infiltration at 900℃ for 8 hr , the bulk density of the sample reached 2.0 g/cm3 , and the open porosity was 13% . The average of micro-hardness reached 87.3 kg / mm2 . In the case of infiltrating Cu for 4hr , significant amount of Cu was infiltrated in the sample at 1100℃ . The amount of infiltrated Cu increased as infiltration time increased . After infiltration at 1300℃ for 4 hr , the bulk density of the sample reached 4.9 g/cm3 , and the open porosity was 2% . The average of micro-hardness reached 114.5 kg / mm2 . After infiltration at 1300℃ for 4 hr , the compression strength of the sample greatly increase due to the load bearing of Cu .