Tribological characteristics of self-lubricating nanostructured aluminum reinforced with multi-wall CNTs processed by flake powder metallurgy and hot pressing method

Akbarpour, M.R.; Alipour, Siamak; Najafi, Mahdi

doi:10.1016/j.diamond.2018.10.004

Cited by 25 publications

(13 citation statements)

References 30 publications

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“…Since the composite consists only of Cu and CNTs, it can be confirmed that thin strips of CNTs can obviously be seen to be distributed parallel to the sliding direction. Therefore, it is difficult for cracks and large debris drops to form, resulting in less wear [34].…”

Section: Resultsmentioning

confidence: 99%

Effect of CNTs in Copper Matrix on Mechanical Characteristics and Tribological Behavior under Dry Sliding and Boundary Lubrication Conditions

et al. 2019

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In the present work, the mechanical and tribological properties of carbon nanotube (CNT)-reinforced Cu matrix composites featuring 0–1.8 vol% CNTs prepared by spark plasma sintering under dry sliding and boundary lubrication conditions were investigated. The results of microstructure revealed that the bonding interface in Cu/CNT composites was very well established. Additionally, the addition of CNTs has a positive effect on improving the hardness and tensile strength of the composites, while the stress–strain response quasi-static tensile test confirms the same results. CNTs are proved to lead to certain self-lubrication. The addition of CNTs could result in decreased coefficient of friction (COF) and wear rates by reducing adhesive wear under dry sliding conditions, while the oil lubricating film was the major reason for decreased COF under boundary lubrication conditions.

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Section: Resultsmentioning

confidence: 99%

Effect of CNTs in Copper Matrix on Mechanical Characteristics and Tribological Behavior under Dry Sliding and Boundary Lubrication Conditions

et al. 2019

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“…[ 13,27 ] Up recently, ball‐milling was considered to be one of the main methods for reducing the CNTs cluster. [ 27–50 ] In the ball‐milling process, low‐speed ball‐milling was difficult to achieve uniform dispersion, while high‐speed ball‐milling usually destroyed the structure of CNTs. [ 51 ] Some researchers also claimed that pre‐dispersion before ball‐milling was an effective auxiliary method for improving dispersion.…”

Section: Introductionmentioning

confidence: 99%

Compression, Energy Absorption, and Electromagnetic Shielding Properties of Carbon Nanotubes/Al Composite Foams

Shao

Yang

et al. 2022

Adv Eng Mater

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Herein, pre‐dispersed ball‐milling and space‐holder methods are used to prepare carbon nanotubes (CNTs) reinforced aluminum (Al) matrix composite foams (C‐AMCFs). Systematic research is conducted on the mechanical and electromagnetic shielding properties of C‐AMCFs as well as the optimal ball‐milling time. The results demonstrate a quasi‐linear relationship between CNTs contents and optimal ball‐milling time. With the addition of CNTs, the compressive performances of C‐AMCFs first increase and subsequently decrease. The 2.5 wt% C‐AMCFs have the best mechanical performance, whose yield strength (19.25 MPa), plateau stress (20.87 MPa), and energy absorption capacity (8.874 MJ m−3), are both 1.72, 1.72, and 1.79 times than those of AFs, respectively. In the X‐band (8.2–12.4 GHz), the addition of CNTs in C‐AMCFs can increase their electromagnetic shielding effectiveness. The greatest electromagnetic shielding effectiveness of the 2.0 wt% C‐AMCFs is 30–40 dB. By enhancing the reflection loss at the first interface as well as the absorption and reflection loss inside the cell walls, CNTs play an important role in improving the electromagnetic shielding performance of C‐AMCFs.

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“…Carbon nano-tubes (CNTs) are well-known reinforcement in metal-matrix-nano-composites, due to their excellent mechanical properties such as superior tensile strength (150 GPa) and high elastic modulus (1TPa). Hence, CNTs have been extensively used to reinforce the nano-composites [19][20][21]. Significant increase in the mechanical properties of the commercially pure aluminum has been reported by Rikhtegar et.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of the Al-Mg/MWCNTs composite powders: The effects of ball milling process parameters

Ahmadian

2021

Preprint

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The effects of multi-walled carbon nano-tubes (MWCNTs) and the ball milling parameters on the mechanical properties of the Al-Mg alloy powders were investigated. Three different composite powders were synthesized through ball-milling process at different time and milling rates. The microstructural and phase analyses were carried out via scanning electron microscopy and X-ray diffraction spectroscopy, respectively. The results indicated that increasing the ball-milling time and rate would lead to the formation of finer particles, which consequently intensifies the plastic deformation and then, results in lower crystallite size. The morphological investigations indicated that while the MWCNTs agglomerates in lower milling rates, increased milling rate not only improve the distribution of the MWCNTs, but also decreases the length of the nano-tubes and promotes their diffusion into Al-Mg matrix. The formation of Al-Mg intermetallic phases through the ball-milling process of the composite powders was also confirmed via microstructural investigations.

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Tribological characteristics of self-lubricating nanostructured aluminum reinforced with multi-wall CNTs processed by flake powder metallurgy and hot pressing method

Cited by 25 publications

References 30 publications

Effect of CNTs in Copper Matrix on Mechanical Characteristics and Tribological Behavior under Dry Sliding and Boundary Lubrication Conditions

Effect of CNTs in Copper Matrix on Mechanical Characteristics and Tribological Behavior under Dry Sliding and Boundary Lubrication Conditions

Compression, Energy Absorption, and Electromagnetic Shielding Properties of Carbon Nanotubes/Al Composite Foams

Mechanical properties of the Al-Mg/MWCNTs composite powders: The effects of ball milling process parameters

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