Aluminum/Carbon Composites Materials Fabricated by the Powder Metallurgy Process

Veillère, Amélie; Kurita, Hiroki; Kawasaki, Akira; Lu, Yong Feng; Heintz, Jean Marc; Silvain, Jean François

doi:10.3390/ma12244030

Cited by 15 publications

(8 citation statements)

References 22 publications

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“…Carbon nanotubes (CNTs) have emerged as an ideal reinforcement to design novel Al-based CNT nanocomposites [ 3 , 4 , 5 , 6 ] due to their exceptional electrical, mechanical and thermal properties [ 7 , 8 , 9 ]. The preferred methodology for processing such nanocomposites is through powder metallurgy [ 6 , 10 ]. The uniform dispersion and optimal bonding of CNTs in the Al matrix have been identified as being critical to enhance its physical properties since the formation of interfacial phases between both Al and CNTs can influence mechanical, electrical and thermal properties of the Al-based CNT composite [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Spark Plasma Sintering of Aluminum-Based Powders Reinforced with Carbon Nanotubes: Investigation of Electrical Conductivity and Hardness Properties

et al. 2021

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This paper focuses on reporting results obtained by the spark plasma sintering (SPS) consolidation and characterization of aluminum-based nanocomposites reinforced with concentrations of 0.5 wt%, 1 wt% and 2 wt% of single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs). Experimental characterization performed by SEM shows uniform carbon nanotube (CNT) dispersion as well as carbon clusters located in the grain boundary of the Al matrix. The structural analysis and crystallite size calculation were performed by X-ray diffraction tests, detecting the characteristic CNT diffraction peak only for the composites reinforced with MWCNTs. Furthermore, a considerable increment in the crystallite size value for those Al samples reinforced and sintered with 1 wt% of CNTs was observed. Hardness tests show an improvement in the composite surface hardness of about 11% and 18% for those samples reinforced with 2 wt% of SWNCTs and MWCNTs, respectively. Conductivity measurements show that the Al samples reinforced with 2 wt% of MWCNTs and with 0.5 wt% SWCNTs reach the highest IACS values of 50% and 34%, respectively.

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Section: Introductionmentioning

confidence: 99%

Spark Plasma Sintering of Aluminum-Based Powders Reinforced with Carbon Nanotubes: Investigation of Electrical Conductivity and Hardness Properties

et al. 2021

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“…Carbon-based nanostructures have been widely used for the preparation and processing of metal composites for improving their physical and mechanical properties [ 1 , 2 , 3 ]. In this sense, aluminum (Al)-based nanocomposites have proven to be excellent materials for the production of parts with enhanced properties for the aerospace and automobile industries [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…These strategies involve the use of oxidative reagents, which could induce some considerable damage in the CNT structure [ 18 ] and hence, hindering their intrinsic properties. Another feasible solution is related to high-energy ball-milling technique widely used for the preparation of materials in powder metallurgy [ 2 , 19 , 20 ]. The latter due to its capability of achieving uniform dispersion of the reinforcement while promoting interfacial bonding between the metallic matrix and the added filler, reducing possible damage in the reinforcement structure while keeping its physical properties [ 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Electrical Conductivity of Aluminum-Based Nanocomposite Produced by Spark Plasma Sintering

Ulloa-Castillo

Hernandez-Maya²,

Islas-Urbano

et al. 2021

Nanomaterials

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This article focuses on exploring how the electrical conductivity and densification properties of metallic samples made from aluminum (Al) powders reinforced with 0.5 wt % concentration of multi-walled carbon nanotubes (MWCNTs) and consolidated through spark plasma sintering (SPS) process are affected by the carbon nanotubes dispersion and the Al particles morphology. Experimental characterization tests performed by scanning electron microscopy (SEM) and by energy dispersive spectroscopy (EDS) show that the MWCNTs were uniformly ball-milled and dispersed in the Al surface particles, and undesirable phases were not observed in X-ray diffraction measurements. Furthermore, high densification parts and an improvement of about 40% in the electrical conductivity values were confirmed via experimental tests performed on the produced sintered samples. These results elucidate that modifying the powder morphology using the ball-milling technique to bond carbon nanotubes into the Al surface particles aids the ability to obtain highly dense parts with increasing electrical conductivity properties.

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“…Due to the advantages of low density, high specific strength, low thermal expansion coefficient, good thermal conductivity and high wear resistance, SiC particle reinforced Al-Si matrix composite (SiCp/Al-Si composite) has been widely used in aerospace applications, electronic instruments, military equipment, wear-resistant materials and many other fields [ 8 , 9 , 10 , 11 , 12 ]. SiCp/Al-Si composites prepared by powder metallurgy usually have the following advantages: the distribution of the reinforcement phase is uniform, the content is easy to adjust, the proportion of each component is accurate and there is no obvious agglomeration [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of CeO2 on the Si Precipitation Mechanism of SiCp/Al-Si Composite Prepared by Powder Metallurgy

et al. 2020

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SiCp/Al-Si composites with different CeO2 contents were prepared by a powder metallurgy method. The effect of CeO2 content on the microstructure of the composites was studied. The mechanism of CeO2 on the precipitation of Si during sintering was analyzed by theoretical calculations. The results show that the appropriate amount of CeO2 can significantly refine the size of precipitated Si particles in the composite and increase the number of Si particles. With the increase of CeO2 content from 0 to 0.6 wt%, the number of Si particles precipitated in the composites increases gradually, and the average particle size of Si particles decreases gradually. When the CeO2 content is 0.6 wt%, the number of Si particles precipitated in the composites reaches the maximum, and the average particle size reaches the minimum. However, with the increase of CeO2 content from 0.6 wt% to 1.8 wt%, the number of Si particles precipitated in the composites began to decrease, and the average size of Si particles gradually increased. CeO2 can be used as heterogeneous nucleation substrate of precipitated Si, and the nucleation rate of precipitated Si on a CeO2 substrate is higher than that on an aluminum substrate. The proper addition of CeO2 can improve the nucleation efficiency of precipitated Si, thus increasing the amount and refining the size of precipitated Si.

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Aluminum/Carbon Composites Materials Fabricated by the Powder Metallurgy Process

Cited by 15 publications

References 22 publications

Spark Plasma Sintering of Aluminum-Based Powders Reinforced with Carbon Nanotubes: Investigation of Electrical Conductivity and Hardness Properties

Spark Plasma Sintering of Aluminum-Based Powders Reinforced with Carbon Nanotubes: Investigation of Electrical Conductivity and Hardness Properties

Enhancement of Electrical Conductivity of Aluminum-Based Nanocomposite Produced by Spark Plasma Sintering

Effects of CeO2 on the Si Precipitation Mechanism of SiCp/Al-Si Composite Prepared by Powder Metallurgy

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