(合肥工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院， 合肥 230009)
摘 要: 采用粉末冶金方法制備碳納米管-銀復(fù)合材料， 研究了制備工藝、 碳納米管含量對(duì)碳納米管-銀基復(fù)合材料密度、 硬度、 抗彎強(qiáng)度、 電導(dǎo)率的影響。結(jié)果表明： 采用復(fù)壓燒結(jié)， 燒結(jié)溫度為700℃時(shí)，復(fù)合材料的性能較好； 碳納米管和銀的弱界面結(jié)合， 使得碳納米管對(duì)復(fù)合材料的強(qiáng)化效果不明顯； 當(dāng)碳納米管的體積含量大于10%時(shí)， 碳納米管在晶界上發(fā)生偏聚， 碳納米管-銀界面對(duì)電子產(chǎn)生散射， 導(dǎo)致復(fù)合材料的電阻率迅速增加。
關(guān)鍵字: 碳納米管； 復(fù)合材料； 制備工藝
（ School of Materials Science and Engineering,
Hefei University of Technology,
Hefei 230009, China）
Abstract: Carbon nanotubes-silver composites were prepared by powder metallurgical method. The influence of processing parameters and the content of carbon nanotubes on the relative density, hardness, bending strength and electrical conductivity of carbon nanotubes-silver composites were investigated. The results show that the composite has comprehensive properties by using re-pressing process and sintering at 700℃. Bending strength of the composites materials is not obviously reinforced by carbon nanotubs, because of poor interfacial bonding between the multiwall carbon nanotubes and silver. Because of the clustering of carbon nanotubes, the electrical resistance of composites increases with the increase of the content of carbon nanotubes when the content of carbon nanotubes is higher than 10%(volume fraction).
Key words: carbon nanotubes; composites; processing parameters
