Raman spectroscopy fingerprint of stainless steel-MWCNTs nanocomposite processed by ball-milling

Stainless steel 304L alloy powder and multiwalled carbon nanotubes were mixed by ball-milling under ambient atmosphere and in a broad range of milling times, which spans from 0 to 120 min. Here, we provided spectroscopic signatures for several distinct composites produced, to show that the Raman spe...

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Veröffentlicht in:AIP advances 2018-01, Vol.8 (1), p.015323-015323-8
Hauptverfasser: dos Reis, Marcos Allan Leite, Barbosa Neto, Newton Martins, de Sousa, Mário Edson Santos, Araujo, Paulo T., Simões, Sónia, Vieira, Manuel F., Viana, Filomena, Loayza, Cristhian R. L., Borges, Diego J. A., Cardoso, Danyella C. S., Assunção, Paulo D. C., Braga, Eduardo M.
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container_end_page 015323-8
container_issue 1
container_start_page 015323
container_title AIP advances
container_volume 8
creator dos Reis, Marcos Allan Leite
Barbosa Neto, Newton Martins
de Sousa, Mário Edson Santos
Araujo, Paulo T.
Simões, Sónia
Vieira, Manuel F.
Viana, Filomena
Loayza, Cristhian R. L.
Borges, Diego J. A.
Cardoso, Danyella C. S.
Assunção, Paulo D. C.
Braga, Eduardo M.
description Stainless steel 304L alloy powder and multiwalled carbon nanotubes were mixed by ball-milling under ambient atmosphere and in a broad range of milling times, which spans from 0 to 120 min. Here, we provided spectroscopic signatures for several distinct composites produced, to show that the Raman spectra present interesting splittings of the D-band feature into two main sub-bands, D-left and D-right, together with several other secondary features. The G-band feature also presents multiple splittings that are related to the outer and inner diameter distributions intrinsic to the multiwalled carbon nanotube samples. A discussion about the second order 2D-band (also known as G′-band) is also provided. The results reveal that the multiple spectral features observed in the D-band are related to an increased chemical functionalization. A lower content of amorphous carbon at 60 and 90 min of milling time is verified and the G-band frequencies associated to the tubes in the outer diameters distribution is upshifted, which suggests that doping induced by strain is taking place in the milled samples. The results indicate that Raman spectroscopy can be a powerful tool for a fast and non-destructive characterization of carbon nanocomposites used in powder metallurgy manufacturing processes.
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The G-band feature also presents multiple splittings that are related to the outer and inner diameter distributions intrinsic to the multiwalled carbon nanotube samples. A discussion about the second order 2D-band (also known as G′-band) is also provided. The results reveal that the multiple spectral features observed in the D-band are related to an increased chemical functionalization. A lower content of amorphous carbon at 60 and 90 min of milling time is verified and the G-band frequencies associated to the tubes in the outer diameters distribution is upshifted, which suggests that doping induced by strain is taking place in the milled samples. 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subjects Alloy powders
Austenitic stainless steels
Ball milling
Carbon
Multi wall carbon nanotubes
Nanocomposites
Nanotubes
Organic chemistry
Powder metallurgy
Raman spectra
Raman spectroscopy
Spectrum analysis
Stainless steel
Tubes
title Raman spectroscopy fingerprint of stainless steel-MWCNTs nanocomposite processed by ball-milling
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