Study of the structural defects on carbon nanotubes in metal matrix composites processed by severe plastic deformation
作者： Katherine Aristizabal , Andreas Katzensteiner , Andrea Bachmaier , Frank Mücklich , Sebastian Suarez
DOI: 10.1016/J.CARBON.2017.09.075
关键词:
摘要: Carbon nanotubes (CNT) have been recently proposed as stabilizers against grain growth that can happen even at low temperature inputs in nano-crystalline and ultrafine-grained materials obtained by severe plastic deformation. In this study, we analyzed the evolution of structural defects on CNT-reinforced nickel matrix composites with different reinforcement weight fractions. The were processed high pressure torsion, used Raman spectroscopy main characterization technique. results indicate for CNT subjected to highly energetic processing, it is not sufficient analyze only ID/IG ratio (as available literature), but also necessary evaluate shifting G band, which traces amorphization trajectory undergone CNT. Furthermore, observed deformation suffered related accumulated strain varies partial fractions these composites. This their capacity withstand occurs during addition, defective state reaches a saturation before achieving microstructural refinement. These will help efficiently optimize processing type engineering
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