The G and D doublet,an intrinsic Raman feature of multi-walled nanotubes(MWNTs),was monitored in an ex-situ fashion for all intermediate stages of a manufacturing process of a MWNT/polymer nanocomposite.The G peak pos...The G and D doublet,an intrinsic Raman feature of multi-walled nanotubes(MWNTs),was monitored in an ex-situ fashion for all intermediate stages of a manufacturing process of a MWNT/polymer nanocomposite.The G peak position and D/G ratios were monitored to characterize the changes in load transfer and disorder,respectively,of the MWNTs.Differences in Raman characteristics desired during the manufacturing process for different structural applications are discussed.Techniques are presented that could optimize any manufacturing parameters for pressurized filtration and resin infusion using the G position and D/G integrated intensity ratio.Similar Raman control techniques could be applied to any intermediate phase of a manufacturing process to develop enhanced novel carbon nanotube composites for structural applications.展开更多
The fabrication of carbon nanotube(CNT)-reinforced ceramic nanocomposites through laser sintering has been rarely studied,and the fabrication feasibility has been rarely tested.Laser sintering is a flexible,localized ...The fabrication of carbon nanotube(CNT)-reinforced ceramic nanocomposites through laser sintering has been rarely studied,and the fabrication feasibility has been rarely tested.Laser sintering is a flexible,localized and high-precision process,which can also potentially produce coatings or parts with complicated shapes and/or spatially controlled compositions.Therefore,compared with other technologies laser sintering has its own advantages.Experimental investigations reported in this paper have confirmed the feasibility of fabricating CNT-reinforced ceramic nanocomposites through laser sintering of ceramic nanoparticles and CNTs.The studies show that laser sintering can induce the agglomeration of ceramic nanoparticles into a relatively more continuous ceramic phase,and during the sintering process CNTs are well preserved without any obvious quality degradation,and they are also bonded with the ceramic phase after laser sintering.展开更多
基金funded by the University of Central Florida Office of Research and Commercialization Inhouse Grant FY 2011.
文摘The G and D doublet,an intrinsic Raman feature of multi-walled nanotubes(MWNTs),was monitored in an ex-situ fashion for all intermediate stages of a manufacturing process of a MWNT/polymer nanocomposite.The G peak position and D/G ratios were monitored to characterize the changes in load transfer and disorder,respectively,of the MWNTs.Differences in Raman characteristics desired during the manufacturing process for different structural applications are discussed.Techniques are presented that could optimize any manufacturing parameters for pressurized filtration and resin infusion using the G position and D/G integrated intensity ratio.Similar Raman control techniques could be applied to any intermediate phase of a manufacturing process to develop enhanced novel carbon nanotube composites for structural applications.
文摘The fabrication of carbon nanotube(CNT)-reinforced ceramic nanocomposites through laser sintering has been rarely studied,and the fabrication feasibility has been rarely tested.Laser sintering is a flexible,localized and high-precision process,which can also potentially produce coatings or parts with complicated shapes and/or spatially controlled compositions.Therefore,compared with other technologies laser sintering has its own advantages.Experimental investigations reported in this paper have confirmed the feasibility of fabricating CNT-reinforced ceramic nanocomposites through laser sintering of ceramic nanoparticles and CNTs.The studies show that laser sintering can induce the agglomeration of ceramic nanoparticles into a relatively more continuous ceramic phase,and during the sintering process CNTs are well preserved without any obvious quality degradation,and they are also bonded with the ceramic phase after laser sintering.
