Strengthening mechanisms in carbon nanotube-reinforced aluminum composites

Park, Jong Gil; Keum, Dong Hoon; Lee, Young Hee

doi:10.1016/j.carbon.2015.08.112

Cited by 293 publications

(86 citation statements)

References 27 publications

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“…These mechanisms were generally thought to occur simultaneously [80]. Similar to Zhang and Chen [27] and Mirza and Chen [11], Park et al [80] also considered that the strength of the composite is the sum of each improvement (i.e., brought from each of the afore-mentioned mechanisms) plus the inherent strength of the matrix itself.…”

Section: Load Transfer Thermal Mismatch and Orowan Loopingmentioning

confidence: 99%

Deformation and strengthening mechanisms of a carbon nanotube reinforced aluminum composite

Mokdad

Chen

Liu

et al. 2016

Carbon

168

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Section: Load Transfer Thermal Mismatch and Orowan Loopingmentioning

confidence: 99%

Deformation and strengthening mechanisms of a carbon nanotube reinforced aluminum composite

Mokdad

Chen

Liu

et al. 2016

Carbon

168

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“…The strengthening mechanisms operating in the Al-12Si/Al 2 O 3 nanocomposites mainly include the load transfer mechanism, Orowan strengthening mechanism, and thermal mismatch enhancement mechanism. These three mechanisms operate simultaneously [31][32][33]. The most accepted strengthening mechanism is the direct strengthening mechanism, also known as load transfer mechanism.…”

Section: Strengthening Mechanismmentioning

confidence: 99%

Effect of Al2O3 Nanoparticles as Reinforcement on the Tensile Behavior of Al-12Si Composites

Jia

Gokuldoss

et al. 2017

Metals

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Al 2 O 3 nanoparticle-reinforced Al-12Si matrix composites were successfully fabricated by hot pressing and subsequent hot extrusion. The influence of weight fraction of Al 2 O 3 particles on the microstructure, mechanical properties, and the corresponding strengthening mechanisms were investigated in detail. The Al 2 O 3 particles are uniformly distributed in the matrix, when 2 and 5 wt. % of Al 2 O 3 particles were added to the Al-12Si matrix. Significant agglomeration can be found in composites with 10 wt. % addition of Al 2 O 3 nanoparticles. The maximum hardness, the yield strength, and tensile strength were obtained for the composite with 5 wt. % Al 2 O 3 addition, which showed an increase of about~11%, 23%, and 26%, respectively, compared with the Al-12Si matrix. Meanwhile, the elongation increased to about~30%. The contribution of different mechanisms including Orowan strengthening, thermal mismatch strengthening, and load transfer strengthening were analyzed. It was shown that the thermal mismatch strengthening has a more significant contribution to strengthening these composites than the Orowan and load transfer strengthening mechanisms.

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“…Three strengthening mechanisms have been reported to govern enhanced mechanical properties of Al-CNT composites: load transfer, generation of dislocations by thermal mismatch, and stored dislocations resulting from severe plastic deformation [11][12][13][14]16]. The strengthening via load transfer mechanism is due to volume fraction and aspect ratio of particles in a metal matrix composite.…”

Section: Hardness Of Al and Al-cnt Composites Processed By Ecapmentioning

confidence: 99%

“…Critical to the realization of such materials with improved properties is the development of fabrication techniques providing a homogeneous dispersion of nanotubes in the metallic matrix. As a result of fabrication, these materials are usually nanostructured in terms of not only CNTs distribution but also in terms of grain size distribution, which provides another strengthening mechanism originating from large content of grain boundary area defects and dislocation substructures [11][12][13][14]. To date, a number of nano-materials have been synthesized to exit in the form of atomic clusters or nano-particles [15][16][17], nano-crystallines [18][19][20], nano-rods [21][22][23], nano-tubes [24,25], and nano-layers [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of carbon nanotubes reinforced aluminum matrix composites synthesized via equal-channel angular pressing

Zare

Jahedi

Toroghinejad

et al. 2016

Materials Science and Engineering: A

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a b s t r a c tIn this work, 2 vol% carbon nanotubes (CNTs) reinforced aluminum (Al) matrix composites of superior microstructural homogeneity are successfully synthesized using Bc equal-channel angular extrusion (ECAP) route. The key step in arriving at high level of homogeneous distribution of CNTs within Al was preparation of the powder using simultaneous attrition milling and ultra-sonication processes. Microstructure as revealed by electron microscopy and absence of Vickers hardness gradients across the material demonstrate that the material reached the homogeneous state in terms of CNT distribution, porosity distribution, and grain structure after eight ECAP passes. To facilitate comparison of microstructure and hardness, samples of Al were processed under the same ECAP conditions. Significantly, the composite containing only 2 vol% exhibits 20% increase in hardness relative to the Al samples.

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Strengthening mechanisms in carbon nanotube-reinforced aluminum composites

Cited by 293 publications

References 27 publications

Deformation and strengthening mechanisms of a carbon nanotube reinforced aluminum composite

Deformation and strengthening mechanisms of a carbon nanotube reinforced aluminum composite

Effect of Al2O3 Nanoparticles as Reinforcement on the Tensile Behavior of Al-12Si Composites

Microstructure and mechanical properties of carbon nanotubes reinforced aluminum matrix composites synthesized via equal-channel angular pressing

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