Processing copper–carbon nanotube composite powders by high energy milling

Shukla, A.K.; Nayan, Nafarizal; Murty, S.V.S. Narayana; Mondal, Kunal; George, K. E.; Bakshi, Srinivasa Rao

doi:10.1016/j.matchar.2013.07.011

Cited by 41 publications

(23 citation statements)

References 40 publications

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“…Many researchers have shown that carbon nanotubes possess remarkable mechanical properties, such as exceptionally high elastic modulus and high tensile strength [13]. There is growing interest in the addition of carbon nanotubes to metal matrixes, and large number of studies has been published to date.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is important to investigate these changes during the mechanical milling process and their eects on densication (1722) behavior of the powder. Mechanical milling of CuCNT powder has been investigated by Shukla et al [13]. They have shown the formation of layered structure by ball milling up to 20 h. They have studied the eect of mechanical milling time and CNT content on morphological changes and particle size during mechanical milling.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural Characterization and Consolidation of Severely Deformed Copper Powder Reinforced with Multiwalled Carbon Nanotubes

Akbarpour

Salahi

2015

Acta Phys. Pol. A

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In this paper, the mechanical milling process for various durations was used to generate a homogeneous distribution of 1 wt.% carbon nanotube within Cu powder. Eects of milling time on morphology, microstructure, and microhardness of the powder were studied. The results showed that work hardened Cu-carbon nanotube nanocomposite powder with nanosized grains can be fabricated by the mechanical milling of the elemental materials. The addition of carbon nanotubes accelerated the morphological and microstructural evolution during the mechanical milling and inuenced the compressibility of the powder. The compressibility behavior of the powder was analyzed using analytical models and used to estimate the strength of the powder. The nanocomposite compacts were sintered in vacuum and showed the maximum relative density of ≈91% at optimum condition.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructural Characterization and Consolidation of Severely Deformed Copper Powder Reinforced with Multiwalled Carbon Nanotubes

Akbarpour

Salahi

2015

Acta Phys. Pol. A

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“…In fact, CNTs transfer heat from the crystallized nuclei via application of thermal shock which prevents the grain growth leading to a very fine and homogeneous grains. It is worthy to know that whereas this value for an individual carbon nanotube is around 300 W m ∘ k [2,21]. On the other hand, the thermal conductivity of CNT clusters is significantly lower than that of an individual CNT [21].…”

Section: Microstructural Evaluationmentioning

confidence: 99%

“…Within the last decade, carbon nanotubes (CNTs) have been widely used as reinforcing agents in composites due to their outstanding properties such as excellent elastic modulus, very high thermal and electrical conductivity and high aspect ratio [2][3][4][5][6][7]. However, processing of these composites particularly metal/CNT composites has been rather challenging [8].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and microstructural characterization of Cu/CNT nanocomposite layers fabricated via friction stir processing

Jafari

Givi

Barmouz

2014

Int J Adv Manuf Technol

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In this study, the effect of incorporation of carbon nanotubes into pure copper was investigated through friction stir processing (FSP). To this end, FSP has been performed using one and three passes. Moreover, the changes in peak temperature of one-pass friction stir processing performed by tools with different shoulder diameters have been recorded. It was found that for the tool with smaller shoulder, the process temperature peak has been significantly reduced. Remarkable reduction in grain size of Cu/carbon-nanotube nanocomposites was observed as compared with the pure copper. Raman spectroscopy results proved a higher extent of degradation of carbon nanotubes upon increasing the friction stir processing passes. On the other hand, microhardness and wear results showed that as the carbon nanotubes are introduced to the pure copper, hardness of composites processed via one-and three-friction stir processing passes showed enhancements of 65 and 105 %, respectively, and the weight losses were also decreased 31 and 68 %, respectively. It was also observed that friction coefficient of one-pass processed composite is lower than that of the pure copper due to the presence of carbon nanotube clusters. Whereas, the friction coefficient of three-pass processed composite was increased regarding to the pure copper. The reduction in slope of wear weight loss upon increasing the applied force at the wear test signified the higher efficiency of the processed composites under harsh conditions.

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“…The major drawback is that, reinforcing carbon in copper matrix can reduce the strength of the composites and it has been considered as a crucial factor limiting its applications [6,7]. However, these distinct shortcomings could be avoided by the incorporation of hard nano strengthening phases in the matrix, such as carbon nanotubes and nano carbides [8][9][10]. Copper hybrid composites has been fabricated with clear interface and even distribution of reinforcements in the matrix by several methods namely spraying, hot pressing, hot extrusion and spark plasma sintering to obtain excellent properties [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Optimizing the Dry Sliding Wear Behavior of Copper Hybrid Nano Composites Reinforced with MWCNTs and Nano B4C Using Full Factorial Design

Gangatharan¹,

Selvakumar²

2015

Trans Indian Inst Met

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In the present study, full factorial design has been used to optimize the wear test conditions of the copper-multi-walled carbon nanotubes and nano boron carbide reinforced composites prepared through entrenched cold-press sintering method of powder metallurgy. The factors like boron carbide particle, applied load and sliding distance of the wear test have been selected as independent variables. This technique has been designed to achieve momentous effects on two responses, namely specific wear resistance and coefficient of friction and 60 experimental runs have been carried out with one replication. To study the micro structural morphology, particle size, worn surface and wear debris of the prepared copper hybrid nanocomposite, scanning electron microscopy, Atomic force microscopy and X-ray diffraction analysis were used for characterization. The ANOVA results were used to validate the developed design and it shows that the applied load and nano boron carbide addition to the matrix material significantly plays an important role in the wear resistance and coefficient of friction of the hybrid composites respectively. A linear regression equation is developed to relate the responses and the operating factors. The optimal conditions for the wear test were: nano boron carbide particles of 2 wt%, load of 5 N and sliding distance of 500 m for both responses.

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Processing copper–carbon nanotube composite powders by high energy milling

Cited by 41 publications

References 40 publications

Microstructural Characterization and Consolidation of Severely Deformed Copper Powder Reinforced with Multiwalled Carbon Nanotubes

Microstructural Characterization and Consolidation of Severely Deformed Copper Powder Reinforced with Multiwalled Carbon Nanotubes

Mechanical and microstructural characterization of Cu/CNT nanocomposite layers fabricated via friction stir processing

Optimizing the Dry Sliding Wear Behavior of Copper Hybrid Nano Composites Reinforced with MWCNTs and Nano B4C Using Full Factorial Design

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