Cu matrix composites reinforced with aligned carbon nanotubes: Mechanical, electrical and thermal properties

Zhao, Sheng; Zhou, Zheng; Huang, Zixin; Dong, Shen; Luo, Peng; Zhang, Zhuang; Wang, Yaowei

doi:10.1016/j.msea.2016.08.044

Cited by 105 publications

(42 citation statements)

References 44 publications

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“…Figure 8(a) shows the effect of CNT alignment on the electrical conductivity of developed nanocomposites containing aligned MWCNTs. As can be seen, alignment of CNTs within the matrix can lead to significant enhancement in the electrical conductivity, which is due to the increase in the interface of CNT bundles that enhanced the contact resistance [27,48]. This trend for parallel direction is significantly higher than perpendicular direction and randomly distributed CNTs.…”

Section: Discussionmentioning

confidence: 94%

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

Amani¹,

Hashemi²,

Mousavi³

et al. 2018

Carbon Nanotubes - Recent Progress

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In the current chapter, achievement of aligned carbon nanotube (CNT) network within the matrix via various kinds of electric fields (AC and DC) was evaluated. In this case, alignment mechanism of CNTs within the matrix and two useful techniques for justification of CNT alignment throughout the matrix were examined and presented, respectively. Afterward, effective factors in matter of CNT alignment and applicable procedures for fabrication of nanocomposites containing aligned CNTs were studied and presented, respectively. At the end, significant effects of CNT alignment on overall properties of nanocomposites that include electrical and mechanical properties were evaluated. Achieved results revealed that alignment of CNTs within the matrix can lead to significant improvement in the electrical and mechanical properties of nanocomposites at the same filler loading compared with randomly distribution of CNTs within the matrix, while production steps and conditions can also highly affect the outcome data.

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Section: Discussionmentioning

confidence: 94%

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

Amani¹,

Hashemi²,

Mousavi³

et al. 2018

Carbon Nanotubes - Recent Progress

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“…Recent experiments have demonstrated that carbon nanotubes typically contain a metallic particle at one of their ends although in some cases, carbon fibers can also encapsulate metallic particles along the fiber axis [83][84][85][86]. The dominant growth mechanism is often defined by the manner in which carbon atoms are transported and absorbed, dissolved, and diffused into the catalyst particle interior and around the catalyst particle surface to give rise to the continuous staking of solid graphitic layers on the catalytic surface.…”

Section: Growth Mechanismsmentioning

confidence: 99%

Recent Advances in the Flame Synthesis of Carbon Nanotubes

Chen¹

2017

AJMSP

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Significant progress has been made not only in improving the yields of carbon nanotubes, but also in gaining a profound fundamental understanding of the growth processes. Flames are emerging as a powerful tool for the synthesis of carbon nanotubes and carbon nanofibers. The flame volume provides a carbon-rich chemically reactive environment capable of generating nanostructures during short residence times in a continuous single-step process. The present work provides a concise review of the advances made over the past two decades in the areas of flame synthesis of carbon nanotubes and carbon nanofibers. An overview of existing flame methods to synthesize carbon nanotubes is first provided. Various catalytic materials, fuel types, and flame configurations have been employed in an attempt to achieve controlled synthesis of carbon nanotubes and carbon nanofibers. Diffusion and premixed flames in counter-flow and co-flow geometries are also discussed. Various hydrocarbon fuels, oxygen enrichment, and dilution with inert gases are then examined in detail. The ability to synthesize and control carbon nanotubes and carbon nanofibers is essential for the fabrication of nanomechanical and electrical devices. A fundamental understanding of the growth mechanism and development of control methods is critically important to address these issues. The purpose of the present review is to clarify the growth mechanisms and achieve controlled flame synthesis of carbon nanotubes and carbon nanofibers.

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“…This is resulted from the agglomeration of CNTs clusters in the Cu matrix. The weak bonding at the interface of Cu and CNTs clusters due to the poor wettability of CNTs with Cu will restrict the load transfer to CNT and therefore, it leads to a reduction of the reinforced effect of CNTs [2,3,9]. The more CNTs clusters were presented, the lower strength of the composite was achieved.…”

Section: Experimental Materials and Proceduresmentioning

confidence: 99%

“…Several methods have been proposed to improve the homogeneity DOI of CNTs such as chemical vapor deposition [7], molecular level mixing [10], electroplating [5] and high energy ball-milling, etc. [2,11]. However, the agglomeration of CNT clusters is still a challenge for uniform distribution of CNT and metal matrix.…”

Section: Introductionmentioning

confidence: 99%

“…The hardness was then decreased as the CNT content increased. The higher hardness values were resulted from higher densification of the sintered samples with ultrasonic-assisted compaction compared to the others.Keywords: Cu-CNT composites, carbon nanotubes, ultrasonic, compaction, hot isostatic pressing 1 Introduction Due to the unique properties of carbon nanotubes (CNT) such as high strength, good thermal conductivity and electrical properties, it's considered to be an ideal reinforcement for metal matrix composites [1][2][3]. An increasing of researches concerning with CNTs reinforced metal matrix composites (CNT-MMC) has been carried out in recent years.…”

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confidence: 99%

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EFFECT OF ULTRASONIC-ASSISTED COMPACTION ON DENSITY AND HARDNESS OF Cu-CNT NANOCOMPOSITES SINTERED BY CAPSULE-FREE HOT ISOSTATIC PRESSING

Trung¹,

Phuong²,

Luan³

et al. 2017

Acta Metall Slovaca

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Cu-CNTs composites were prepared with and without ultrasonic-assisted compaction in this work. The samples were sintered by capsule-free hot isostatic pressing at 920 o C and 50 MPa Ar gases. The results showed that the higher relative density and Brinell hardness were obtained for ultrasonic assisted compaction samples (at the same CNT content). For both cases, the highest hardness values was achieved at 0.5 wt.% CNT (49.2 HB and 45.8 HB for specimens with and without the ultrasonic-assisted compaction, respectively). The hardness was then decreased as the CNT content increased. The higher hardness values were resulted from higher densification of the sintered samples with ultrasonic-assisted compaction compared to the others.Keywords: Cu-CNT composites, carbon nanotubes, ultrasonic, compaction, hot isostatic pressing 1 Introduction Due to the unique properties of carbon nanotubes (CNT) such as high strength, good thermal conductivity and electrical properties, it's considered to be an ideal reinforcement for metal matrix composites [1][2][3]. An increasing of researches concerning with CNTs reinforced metal matrix composites (CNT-MMC) has been carried out in recent years. There are several techniques to fabricate CNT-MMC including powder metallurgy, electrodeposition, electroplating, melting and spray coating methods [3][4][5][6][7][8][9]. In which, powder route is the most popular method being used. The basic steps of the method include mixing CNT with metal powder (Al, Cu, Ni, etc.) via a mechanical alloying, and following by compaction and sintering. Up to date, the challenge is how to induce a uniform dispersion of CNT in metal matrix, especially, for high CNT amount. The strong van der Waal's force of attraction among CNT, the density discrepancy between CNT and metal matrix, the tendency to agglomeration and tangle together of CNT are attributed to the poor dispersion of CNT in the metal matrix. Besides that the weak interface bonding between CNT and metal matrices due to the poor wettability characteristic of CNT with metal matrices also restrict the incorporation of CNT with metal matrix. And so, these cause the reduction in their expected properties of the composites. Several methods have been proposed to improve the homogeneity

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Cu matrix composites reinforced with aligned carbon nanotubes: Mechanical, electrical and thermal properties

Cited by 105 publications

References 44 publications

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

Recent Advances in the Flame Synthesis of Carbon Nanotubes

EFFECT OF ULTRASONIC-ASSISTED COMPACTION ON DENSITY AND HARDNESS OF Cu-CNT NANOCOMPOSITES SINTERED BY CAPSULE-FREE HOT ISOSTATIC PRESSING

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