Strong and ductile nanostructured Cu-carbon nanotube composite

Li, Hongqi; Misra, Amit; Horita, Zenji; Koch, Carl C.; Mara, Nathan A.; Dickerson, P.; Zhu, Yuntian

doi:10.1063/1.3211921

Cited by 72 publications

(43 citation statements)

References 33 publications

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“…This was crucial in transferring the applied load from the matrix to the CNTs. Homogenous distribution of CNTs inside the grain boundaries restricts matrix deformation leading to improved hardness and modulus of elasticity [12]. The trends of observed results are in complete agreement with reported work on Cu or Al [13,14].…”

Section: Analysis Of Mechanical Propertiessupporting

confidence: 81%

CNT Reinforced Silver Nanocomposites: Mechanical and Electrical Studies

Kumar

Nain

Neena

et al. 2016

Journal of Materials

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Nanoindentation hardness and elastic modulus of the silver/MWCNT (multiwalled carbon nanotubes) composites, fabricated by modified wet mixing technique, are studied in the present work. CNT reinforced silver nanocomposites, fabricated by introducing 4.5 volume percentages of CNT in the silver matrix, have increased elastic modulus and approximately 50% higher hardness than pure nanosilver. It is also observed from the results that the electrical conductivity of the fabricated materials was decreased by increasing the CNTs volume %.

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Section: Analysis Of Mechanical Propertiessupporting

confidence: 81%

CNT Reinforced Silver Nanocomposites: Mechanical and Electrical Studies

Kumar

Nain

Neena

et al. 2016

Journal of Materials

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“…[3] In the HPT process, first introduced by Bridgman in 1935, [4] a small thin disc is placed between two massive anvils under a high hydrostatic pressure and intense shear strain is introduced by rotating the two anvils with respect to each other. The HPT as a processing tool for consolidation of powders was first used in 1991 [2] and further developed for the consolidation of metallic powders, [5][6][7][8] composites, [9][10][11][12][13][14][15][16][17][18][19][20][21][22] amorphous compounds, [22][23][24][25][26][27][28] machining chips, [28][29][30] and very recently for ceramic powders. [31] The HPT process was also applied successfully as a cold consolidation technique without sintering process for ball-milled powders including pure Ni, [5] pure Co, [7] an Al-Mg alloy, [8] Co-based metal-ceramic composites, [17,18] and amorphous powders and chips.…”

Section: Introductionmentioning

confidence: 99%

Cold Consolidation of Ball-Milled Titanium Powders Using High-Pressure Torsion

Edalati

Horita

Fujiwara

et al. 2010

Metall Mater Trans A

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KAVEH EDALATI, ZENJI HORITA, HIROSHI FUJIWARA, and KEI AMEYAMA Pure Ti (99.5 pct) powders after processing with ball milling (BM) were consolidated to disc-shaped samples with 10-mm diameter and 0.8-mm thickness at room temperature using high-pressure torsion (HPT). A relative density as high as 99.9 pct, high bending and tensile strengths of 2.55 to 3.45 and 1.35 GPa, respectively, and a moderate ductility of 8 pct with an ultrafine grained structure are achieved after cold consolidation with HPT, which exceed those of hot consolidation methods. X-ray diffraction (XRD) analysis showed that a phase transformation occurs from a phase to x phase during HPT under a pressure of 6 GPa as in bulk pure Ti, whereas no phase transformation is detected after processing with BM alone. It was confirmed that the strength and ductility are improved by a combined application of BM and HPT when compared with other severe plastic deformation methods applied to Ti and Ti-6 pct Al-4 pct V, so that no alloying elements are required for the achievement of a comparable strength and ductility.This study used high-purity Ti (99.5 pct) powders with a particle size less than 45 lm having impurities of O 0.35, C 0.02, N 0.03, H 0.02, Fe 0.03, Mn 0.005, Mg 0.02, Cl 0.04, and Si 0.01 (wt pct). The Ti powders were KAVEH EDALATI, Graduate Student, and ZENJI HORITA, Professor, are with the

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“…In some cases, even copper with carbon nanotubes are reported to have high strength and good ductility. 75 Of these different (primarily) carbide and oxide reinforcements, alumina (Al 2 O 3 ) and niobium carbide (NbC) are the most common to be combined with the copper matrix. In many cases, increased hardness values (yield strengths) are reported due to a combination of Hall-Petch hardening for the small grain size of the copper matrix and Orowan strengthening for the fine dispersion of oxide/carbides.…”

Section: Copper Intermetallics and Compositesmentioning

confidence: 99%

“Bulk” Nanocrystalline Metals: Review of the Current State of the Art and Future Opportunities for Copper and Copper Alloys

Tschopp

Murdoch

Kecskes

et al. 2014

JOM

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It is a new beginning for innovative fundamental and applied science in nanocrystalline materials. Many of the processing and consolidation challenges that have haunted nanocrystalline materials are now more fully understood, opening the doors for bulk nanocrystalline materials and parts to be produced. While challenges remain, recent advances in experimental, computational, and theoretical capability have allowed for bulk specimens that have heretofore been pursued only on a limited basis. This article discusses the methodology for synthesis and consolidation of bulk nanocrystalline materials using mechanical alloying, the alloy development and synthesis process for stabilizing these materials at elevated temperatures, and the physical and mechanical properties of nanocrystalline materials with a focus throughout on nanocrystalline copper and a nanocrystalline Cu-Ta system, consolidated via equal channel angular extrusion, with properties rivaling that of nanocrystalline pure Ta. Moreover, modeling and simulation approaches as well as experimental results for grain growth, grain boundary processes, and deformation mechanisms in nanocrystalline copper are briefly reviewed and discussed. Integrating experiments and computational materials science for synthesizing bulk nanocrystalline materials can bring about the next generation of ultrahigh strength materials for defense and energy applications.

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Strong and ductile nanostructured Cu-carbon nanotube composite

Cited by 72 publications

References 33 publications

CNT Reinforced Silver Nanocomposites: Mechanical and Electrical Studies

CNT Reinforced Silver Nanocomposites: Mechanical and Electrical Studies

Cold Consolidation of Ball-Milled Titanium Powders Using High-Pressure Torsion

“Bulk” Nanocrystalline Metals: Review of the Current State of the Art and Future Opportunities for Copper and Copper Alloys

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