Strong, ductile, and thermally conductive carbon nanotube-reinforced aluminum matrix composites fabricated by ball-milling and hot extrusion of powders encapsulated in aluminum containers

Ogawa, Fumio; Yamamoto, S.; Masuda, Chitoshi

doi:10.1016/j.msea.2017.11.077

Cited by 29 publications

(14 citation statements)

References 33 publications

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“…Compared with nano-reinforced polymer-matrix composites, CNT-reinforced metal-matrix composites have not been extensively studied [5][6][7]. CNTreinforced aluminum-matrix composites which have potential applications in automobiles, aerospace vehicles, and thermal management devices [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] have attracted increased research attention.…”

Section: Introductionmentioning

confidence: 99%

“…The degrees of dispersion and the fracture of CNTs can be controlled during ball milling by ball milling speed and milling duration, and CNTs can be aligned via hot extrusion. To date, grain refinement via ball milling and the alignment of CNTs are effective approaches for improving the strength of CNT-reinforced aluminum-matrix composites [11,24,25]. However, the mechanism responsible for the thermal conductivity of such composites has not been elucidated.…”

Section: Introductionmentioning

confidence: 99%

“…Two ball milling speeds and two durations were adopted to investigate the effects of the degree of dispersion of CNTs and fracture on the properties of the resultant composites. Composites were fabricated via three fabrication routes: SPS, SPS followed by hot extrusion, and powder extrusion [24,25]. In powder extrusion, a mixed powder of CNFs and aluminum was encapsulated into an aluminum container and extruded at 550°C.…”

Section: Introductionmentioning

confidence: 99%

“…The effects of ball milling speed, heating duration before extrusion, and extrusion ratio [9 (R9) or 16 (R16)] on the tensile strength, ductility, and fracture process of the composites were investigated. Some fabrication conditions to achieve these tensile properties were selected based on previous studies [24,25]. In a previous study, composites with unprecedently superior mechanical properties and thermal conductivity were fabricated by optimizing the mixing conditions of CNFs and aluminum to homogeneously disperse CNFs and to avoid extensively fracturing CNFs during milling [25].…”

Section: Introductionmentioning

confidence: 99%

“…Some fabrication conditions to achieve these tensile properties were selected based on previous studies [24,25]. In a previous study, composites with unprecedently superior mechanical properties and thermal conductivity were fabricated by optimizing the mixing conditions of CNFs and aluminum to homogeneously disperse CNFs and to avoid extensively fracturing CNFs during milling [25]. In the study, the CNFs and aluminum powder were mixed in a planetary ball mill (Fritsch Pulverisette 5).…”

Section: Introductionmentioning

confidence: 99%

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Thermal Conductivity and Tensile Properties of Carbon Nanofiber-Reinforced Aluminum-Matrix Composites Fabricated via Powder Metallurgy: Effects of Ball Milling and Extrusion Conditions on Microstructures and Resultant Composite Properties

Ogawa

Yamamoto

Masuda

2018

Acta Metall. Sin. (Engl. Lett.)

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Carbon nanofiber (CNF)-reinforced aluminum-matrix composites were fabricated via ball milling and spark plasma sintering (SPS), SPS followed by hot extrusion and powder extrusion. Two mixing conditions of CNF and aluminum powder were adopted: milling at 90 rpm and milling at 200 rpm. After milling at 90 rpm, the mixed powder was sintered using SPS at 560°C. The composite was then extruded at 500°C at an extrusion ratio of 9. Composites were also fabricated via powder extrusion of powder milled at 200 rpm and 550°C with an extrusion ratio of 9 (R9) or 16 (R16). The thermal conductivity and tensile properties of the resultant composites were evaluated. Anisotropic thermal conductivity was observed even in the sintered products. The anisotropy could be controlled via hot extrusion. The thermal conductivity of composites fabricated via powder extrusion was higher than those fabricated using other methods. However, in the case of specimens with a CNF volume fraction of 4.0%, the thermal conductivity of the composite fabricated via SPS and hot extrusion was the highest. The highest thermal conductivity of 4.0% CNF-reinforced composite is attributable to networking and percolation of CNFs. The effect of the fabrication route on the tensile strength and ductility was also investigated. Tensile strengths of the R9 composites were the highest. By contrast, the R16 composites prepared under long heating duration exhibited high ductility at CNF volume fractions of 2.0% and 5.0%. The microstructures of composites and fracture surfaces were observed in detail, and fracture process was elucidated. The results revealed that controlling the heating and plastic deformation during extrusion will yield strong and ductile composites.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Thermal Conductivity and Tensile Properties of Carbon Nanofiber-Reinforced Aluminum-Matrix Composites Fabricated via Powder Metallurgy: Effects of Ball Milling and Extrusion Conditions on Microstructures and Resultant Composite Properties

Ogawa

Yamamoto

Masuda

2018

Acta Metall. Sin. (Engl. Lett.)

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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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Thermal Transport in 3D Nanostructures

Zhan

Nie

Chen

et al. 2019

Adv Funct Materials

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This work summarizes the recent progress on the thermal transport properties of 3D nanostructures, with an emphasis on experimental results. Depending on the applications, different 3D nanostructures can be prepared or designed to either achieve a low thermal conductivity for thermal insulation or thermoelectric devices or a high thermal conductivity for thermal interface materials used in the continuing miniaturization of electronics. A broad range of 3D nanostructures are discussed, ranging from colloidal crystals/assemblies, array structures, holey structures, hierarchical structures, to 3D nanostructured fillers for metal matrix composites and polymer composites. Different factors that impact the thermal conductivity of these 3D structures are compared and analyzed. This work provides an overall understanding of the thermal transport properties of various 3D nanostructures, which will shed light on the thermal management at nanoscale.

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Strong, ductile, and thermally conductive carbon nanotube-reinforced aluminum matrix composites fabricated by ball-milling and hot extrusion of powders encapsulated in aluminum containers

Cited by 29 publications

References 33 publications

Thermal Conductivity and Tensile Properties of Carbon Nanofiber-Reinforced Aluminum-Matrix Composites Fabricated via Powder Metallurgy: Effects of Ball Milling and Extrusion Conditions on Microstructures and Resultant Composite Properties

Thermal Conductivity and Tensile Properties of Carbon Nanofiber-Reinforced Aluminum-Matrix Composites Fabricated via Powder Metallurgy: Effects of Ball Milling and Extrusion Conditions on Microstructures and Resultant Composite Properties

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

Thermal Transport in 3D Nanostructures

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