Morphological change of multiwalled carbon nanotubes through high-energy (MeV) ion irradiation

2005 ◽  
Vol 97 (2) ◽  
pp. 026103 ◽  
Author(s):  
H. M. Kim ◽  
H. S. Kim ◽  
S. K. Park ◽  
J. Joo ◽  
T. J. Lee ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Morphological Change ◽  
Multiwalled Carbon Nanotubes ◽  
Ion Irradiation ◽  
High Energy ◽  
Multiwalled Carbon

Effect of intense laser and energetic ion irradiation on Raman modes of Multiwalled Carbon Nanotubes

2009 ◽  
Vol 517 (15) ◽  
pp. 4322-4324 ◽  
Author(s):  
Amit Kumar ◽  
F. Singh ◽  
P.M. Koinkar ◽  
D.K. Avasthi ◽  
J.C. Pivin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Ion Irradiation ◽  
Intense Laser ◽  
Multiwalled Carbon ◽  
Raman Modes

scholarly journals Effect of Increasing the Strength of Aluminum Matrix Nanocomposites Reinforced with Microadditions of Multiwalled Carbon Nanotubes Coated with TiC Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1596 ◽  
Author(s):  
Artemiy Aborkin ◽  
Kirill Khorkov ◽  
Evgeny Prusov ◽  
Anatoly Ob’edkov ◽  
Kirill Kremlev ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Aluminum Matrix ◽  
High Energy ◽  
High Tech ◽  
Multiwalled Carbon ◽  
The Matrix ◽  
Tic Nanoparticles ◽  
Matrix Nanocomposites

Aluminum matrix composites reinforced with multiwalled carbon nanotubes (MWCNTs) are promising materials for applications in various high-tech industries. Control over the processes of interfacial interaction in Al/MWCNT composites is important to achieve a high level of mechanical properties. The present study describes the effects of coating MWCNTs with titanium carbide nanoparticles on the formation of mechanical properties and the evolution of the reinforcement structure in bulk aluminum matrix nanocomposites with low concentrations of MWCNTs under conditions of solid-phase consolidation of ball-milled powder mixtures. Using high-energy ball milling and uniaxial hot pressing, two types of bulk nanocomposites based on aluminum alloy AA5049 that were reinforced with microadditions of MWCNTs and MWCNTs coated with TiC nanoparticles were successfully produced. The microstructural and mechanical properties of the Al/MWCNT composites were investigated. The results showed that, on the one hand, the TiC nanoparticles on the surface of the MWCNT hybrid reinforcement reduced the damage of reinforcement under the intense exposure of milling bodies, and on the other hand, they reduced the contact area of the MWCNTs with the matrix material (acting as a barrier interface), which also locally inhibited the reaction between the matrix and the MWCNTs.

scholarly journals Structural, microstructural, magnetic and electromagnetic absorption properties of spiraled multiwalled carbon nanotubes/barium hexaferrite (MWCNTs/BaFe12O19) hybrid

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nurshahiera Rosdi ◽  
Raba’ah Syahidah Azis ◽  
Ismayadi Ismail ◽  
Nurhidayaty Mokhtar ◽  
Muhammad Misbah Muhammad Zulkimi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Multiwalled Carbon Nanotubes ◽  
Reflection Loss ◽  
Barium Hexaferrite ◽  
High Energy ◽  
Absorption Properties ◽  
Multiwalled Carbon ◽  
Absorption Bandwidth ◽  
Minimum Reflection Loss

AbstractMicrowave absorption properties were systematically studied for synthesised barium hexaferrite (BaFe12O19) nanoparticles and spiraled multiwalled carbon nanotubes (MWCNTs) hybrid. BaFe12O19 nanoparticles were synthesised by a high energy ball milling (HEBM) followed by sintering at 1400 °C and structural, electromagnetic and microwave characteristics have been scrutinized thoroughly. The sintered powders were then used as a catalyst to synthesise spiraled MWCNTs/BaFe12O19 hybrid via the chemical vapour deposition (CVD) process. The materials were then incorporated into epoxy resin to fabricate single-layer composite structures with a thickness of 2 mm. The composite of BaFe12O19 nanoparticles showed a minimum reflection loss is − 3.58 dB and no has an absorption bandwidth while the spiraled MWCNTs/BaFe12O19 hybrid showed the highest microwave absorption of more than 99.9%, with a minimum reflection loss of − 43.99 dB and an absorption bandwidth of 2.56 GHz. This indicates that spiraled MWCNTs/BaFe12O19 hybrid is a potential microwave absorber for microwave applications in X and Ku bands.

ENHANCEMENT OF FIELD EMISSION CHARACTERISTICS IN ALIGNED MULTIWALLED CARBON NANOTUBES DUE TO 70 MeV Ni6+ ION IRRADIATION

2011 ◽  
Vol 10 (04n05) ◽  
pp. 1057-1060
Author(s):  
BRAHMANANDA CHAKRABORTY ◽  
B. SATPATI ◽  
P. MODAK ◽  
K. S. HAZRA ◽  
P. RAI ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Field Emission ◽  
Low Dose ◽  
Ion Irradiation ◽  
Morphological Changes ◽  
Emission Current Density ◽  
Emission Characteristics ◽  
Electron Microscopic ◽  
Multiwalled Carbon

Here we report the role of ion irradiation in the field emission characteristics of aligned multiwalled carbon nanotubes (MWNTs). Aligned MWNTs show improvement in field emission characteristics under low dose 70 Mev Ni6+ ion irradiation. But field emission current density reduces for the higher dose due to adsorption of amorphous carbon and melting as well damage of carbon nanotubes (CNTs). High resolution transmission electron microscopic (HRTEM) analysis has been carried out to find the morphological changes due to ion irradiation leading to modifications in field emission characteristics. At low dose formation of dangling bond, cross-linking between different layers, exposure of buried emission sites and reduction of mutual shielding are responsible for the enhancement in field emission characteristics.

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