Elastic modulus measurements of vertically aligned multi walled carbon nanotubes carpets by using the nanoindentation technique

Belhenini, Soufyane; Labbaye, Thibault; Boulmer‐Leborgne, Chantal; Kovačević, Eva; Tougui, Abdellah; Dosseul, Franck

doi:10.1016/j.mechrescom.2017.07.010

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…The values to compare the previous results to those obtained in the present work have not been found in the literature, except the MWCNTs coating. The elastic modulus of MWCNTs ranged between 270 and 2400 GPa [55], while in other work it was 467-507 GPa [63]. For TiO 2 reinforced with CNTs composites [64], hardness was about 250 GPa and elastic modulus about 190 GPa, and for fluorapatite-TiO 2 and fluorapatite-TiO 2 -CNT(Cu) coatings hardness was only 0.72 and 0.58 GPa, and Young's modulus 14.5 and 19.3 GPa, respectively [65].…”

Section: Discussionmentioning

confidence: 73%

Mechanical Behavior of Bi-Layer and Dispersion Coatings Composed of Several Nanostructures on Ti Substrate

et al. 2021

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Three coatings suitable for biomedical applications, including the dispersion coating composed of multi-wall carbon nanotubes (MWCNTs), MWCNTs/TiO2 bi-layer coating, and MWCNTs-Cu dispersion coating, were fabricated by electrophoretic deposition (EPD) on Ti Grade II substrate. Optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and nanoindentation were applied to study topography, chemical, and phase composition, roughness, hardness, Young’s modulus, plastic, and elastic behavior. The results showed that the best mechanical properties in terms of biomedical application were achieved for the MWCNTs coating with titania outer layer. Nevertheless, both the addition of nanocopper and titania improved the mechanical resistance of the base MWCNTs coating. Compared to our previous experiments on Ti13Nb13Zr alloy, a general tendency is observed to form more homogenous coatings on pure metal than on the alloy, in which chemical and phase compositions are more complex.

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Section: Discussionmentioning

confidence: 73%

Mechanical Behavior of Bi-Layer and Dispersion Coatings Composed of Several Nanostructures on Ti Substrate

et al. 2021

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“…Belhenini et al . reported the modulus of CNTs array was around 500 GPa measured by nanoindentation . As shown in Figure (b), the direction of nanoindentation was along the axes of CNTs; thus the CNTs array could endow the ESMP nanocomposite a higher modulus and hardness through efficient load transfer.…”

Section: Resultsmentioning

confidence: 88%

Carbon nanotubes array reinforced shape‐memory epoxy with fast responses to low‐power microwaves

Chen

Xiao-pei

et al. 2019

J of Applied Polymer Sci

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In this study, epoxy shape-memory polymer (ESMP) was infiltrated into the scaffolds of vertically aligned carbon nanotubes (CNTs) array grown by chemical vapor deposition (CVD). In the fabricated CNTs array/ESMP nanocomposite, the CNTs interconnected with each other and a three-dimensional (3D) network of the CNTs was formed. As a result, both thermal conductivity and electrical conductivity of the CNTs array/ESMP nanocomposite were higher than the random CNTs/ESMP composite fabricated by conventional high-speed mechanical stirring. In the random CNTs/ESMP composite, the CNTs aggregated seriously in the matrix. Along the CNTs axis, The CNTs array/ESMP nanocomposite showed a higher modulus and hardness than the random CNTs/ESMP composite, as revealed by nanoindentation tests. Under microwave radiation, the temperature of the CNTs array/ESMP nanocomposite increased more rapidly than pristine ESMP and the random CNTs/ESMP composite. Consequently, the CNTs array/ESMP nanocomposite showed a faster shape recovery speed compared with pristine ESMP and the random CNTs/ESMP composite in their microwavetriggered shape memory behaviors. Especially, the CNTs array/ESMP nanocomposite can recover the deformation fully in response to as low as 60 W microwaves. The presented CNTs array/ESMP nanocomposite with improved mechanical property and fast responses to low-power microwaves may find potential applications in smart devices.

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“…The increase in indentation depth resulted in decreased hardness and reduced modulus responses. The large indentation depth was applied because the CNTs contact can be pushed sideways during measurement, resulting in small values of reduced modulus and hardness; moreover, maximum penetration depth was close to the height of CNTs . Olek et al measured coated CNTs on silica at a load of 900 μN and recorded results of 0.12 ± 20 GPa hardness and 3.5 ± 1 GPa reduced modulus.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of thermal interface material properties using carbon nanotubes through simple electrophoretic deposition method

Bahru

Mohamed

2020

Int J Energy Res

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The industrial revolution development of electronic technologies has turned the electronic system into a complicated integration of high-power density and smart design. The complex integrated design has contributed to the excessive heat generation in electronic devices. Consequently, heat management devices have become crucial in prolonging the lives of devices and components and maintaining their optimal performance. Therefore, the passive heat management treatment through thermal interface materials (TIMs) in the devices is among the best options to remove heat from electronic devices. Carbon nanotubes (CNTs) with high-thermal conductivity was employed in this study for TIM development by using the simple electrophoretic deposition (EPD) method. The CNTs were synthesized and purified before TIM development. Several analyses, including transmission electron microscopy, thermogravimetric analysis, Raman spectroscopy, and Fourier-transform infrared, were conducted. Analysis results showed that only 0.03 wt% was retained and carbon content increased up to 97.84% after purification. The purified CNTs were dissolved in a suspension medium with a ratio of 0.5 mg/mL to achieve suspension stability, and a Zetasizer was used for verification. The following three operating parameters of EPD were investigated: (a) range of applied voltage (100-200 V), (b) deposition time (1-20 min), and (c) gap between electrodes (10-20 mm). On the basis of the characterization results, the optimum process condition of EPD was achieved at 175 V, 10 minutes, and 10 mm with 1.6 mg of CNT deposition and 14.14 μm of CNT thickness. The maximum thickness of deposited CNTs was 56.95 μm, producing 27.08 W/mÁK and 2.09 mm 2 /s of thermal conductivity and diffusivity, respectively. These results indicate the high potential of CNTs in facilitating efficient heat removal in TIM fabrication. K E Y W O R D Scarbon nanotubes, electrophoretic deposition, heat spreader, thermal interface materials

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Elastic modulus measurements of vertically aligned multi walled carbon nanotubes carpets by using the nanoindentation technique

Cited by 7 publications

References 24 publications

Mechanical Behavior of Bi-Layer and Dispersion Coatings Composed of Several Nanostructures on Ti Substrate

Mechanical Behavior of Bi-Layer and Dispersion Coatings Composed of Several Nanostructures on Ti Substrate

Carbon nanotubes array reinforced shape‐memory epoxy with fast responses to low‐power microwaves

Enhancement of thermal interface material properties using carbon nanotubes through simple electrophoretic deposition method

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