Microstructure and Properties of Nanocrystalline Copper Strengthened by a Low Amount of Al2O3 Nanoparticles

Ďurišinová, Katarína; Durisin, Juraj; Ďurišin, Martin

doi:10.1007/s11665-017-2534-9

Cited by 14 publications

(3 citation statements)

References 15 publications

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“…For all examined composites, the amount of Fe impurity is approximately equal, linearly increasing the electrical resistivity with increasing concentration in the Cu-based solid solution [36]. Fe content is 0.2-0.8 wt.…”

Section: Janovszky Et Al / Jmm 54 (3) B (2018) 349 -360mentioning

confidence: 90%

Development of novel ultrafine grain cu metal matrix composites reinforced with Ti-Cu-Co-M (M: Ni, Zr) amorphous-nanocrystalline powder

Janovszky

Kristály

Mikó

et al. 2018

J min metall B Metall

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Novel ultrafine grain composites of Cu matrix reinforced with 2-50 wt. % of Ti 48 Cu 39.5 Ni 10 Co 2.5 and Ti 48 Cu 39.5 Zr 10 Co 2.5 (at. %) amorphous-nanocrystalline alloy particles have been fabricated by powder metallurgy. The composites showed a homogeneous structure. The characterization of composites was performed by optical and scanning electron microscopy (SEM), X-ray powder diffraction (XRD), micro-and macrohardness, as well as density measurements. After hot-pressing the crystallite size of Cu was smaller than 200 nm and nanocrystalline phases of reinforcing powder were 5-35 nm. Densities of 97-76 % relative to calculated values of consolidated composites were obtained, depending on the reinforcing weight fraction. Additionally, the mechanical properties and electrical resistivity of composites have been investigated. The results reveal that the 0.2% offset compressive yield strength of composites increases by two and five times, with respect to pure Cu matrix, for the composites reinforced with 2 and 50 wt. % of reinforcing particles, respectively. Electrical resistivity increases continuously, with higher values after 30 wt. % of addition. Changes in mechanical and electrical properties were produced by the increase of amorphous-nanocrystalline additive.

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Section: Janovszky Et Al / Jmm 54 (3) B (2018) 349 -360mentioning

confidence: 90%

Development of novel ultrafine grain cu metal matrix composites reinforced with Ti-Cu-Co-M (M: Ni, Zr) amorphous-nanocrystalline powder

Janovszky

Kristály

Mikó

et al. 2018

J min metall B Metall

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“…There are various methods to prepare ACCM, which employs Al 2 O 3 particles externally or by in situ generation. The methods which involve the external addition of Al 2 O 3 particles include powder metallurgy [ 15 ], mechanical alloying [ 16 ], mixing casting [ 17 ], and pressureless penetration [ 18 ], and so on. The methods involving the in situ generation of reinforcing Al 2 O 3 particles include internal oxidation [ 19 ], self-spreading high-temperature synthesis [ 20 ], chemical wrapping [ 21 ], sol-gel [ 22 ], and so on.…”

Section: Introductionmentioning

confidence: 99%

Preparing and Wear-Resisting Property of Al2O3/Cu Composite Material Enhanced Using Novel In Situ Generated Al2O3 Nanoparticles

et al. 2023

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Al2O3/Cu composite material (ACCM) are highly suitable for various advanced applications owing to its excellent properties. In the present work, a combination of the solution combustion synthesis and hydrogen reduction method was first employed to prepare Al2O3/Cu composite powder (ACCP), and subsequently ACCM was prepared by employing spark plasma sintering (SPS) technique. The effect of Al2O3 contents and SPS temperatures on the properties (relative density, hardness, friction coefficient, and electrical conductivity, et al.) of ACCM were investigated in detail. The results indicated that ACCM was very dense, and microstructure was consisted of fine Al2O3 particles evenly distributed in the Cu matrix. With the increase of SPS temperature, the relative density and hardness of ACCM had first increased and then decreased. At 775 °C, the relative density and hardness had attained the maximum values of 98.19% and 121.4 HV, respectively. With the increase of Al2O3 content, although the relative density of ACCM had gradually decreased, nevertheless, its friction coefficient had increased. Moreover, with the increase of Al2O3 contents, the hardness of ACCM first increased and then decreased, and reached the maximum value (121.4 HV) with 3 wt.% addition. On the contrary, the wear rate of ACCM had first decreased and then increased with the increase of Al2O3 contents, and attained the minimum (2.32 × 10−5 mm3/(N.m)) with 3 wt.% addition.

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“…DS materials are possible to prepare by powder metallurgy. In the field of DS-based copper composites, various methods and their modifications are being developed to provide high thermal stability of nano-grains as well as high strength and conductivity in a wide temperature range [2][3][4][5][6]. It is well known, nanostructured materials are characterized by very low ductility (of about 2 %).…”

Section: Introductionmentioning

confidence: 99%

Influence of Oxide Dispersoids on the Structure Development of Copper Nanocomposite Prepared by Spark Plasma Sintering Technology

Szabó

Ďurišinová

Milkovič

et al. 2020

DDF

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Dispersion strengthened Cu composites are studied over recent years to find an optimum processing route to obtain a high strength, thermal-stable copper alloy designed for modern applications in electrical engineering. The experimental Cu–4Al2O3–1MgO material was prepared by in situ thermo-chemical technique and mechanical milling followed by spark plasma sintering (SPS). The study analyses the influence of the Al2O3 and MgO secondary phases on strengthening the copper matrix. Microstructure of the composite was studied by X-ray diffraction analysis, scanning and transmission electron microscopy. The sintered microstructure shows a grain size distribution characterized by ultrafine grains/twins embedded inside the matrix of nanocrystalline grains. The microstructure is thermal stable up to 900 °C due to the dispersed alumina nano-particles that effectively strengthen crystallite/grain boundaries during the SPS process and annealing of the sintered compact at elevated temperatures. On the other hand, the coarsened MgO particles are responsible for ultrafine grains/twins formation. The obtained microstructure is important for practical utilization of the material because this structure is characterized by a good combination of strength and ductility.

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Microstructure and Properties of Nanocrystalline Copper Strengthened by a Low Amount of Al2O3 Nanoparticles

Cited by 14 publications

References 15 publications

Development of novel ultrafine grain cu metal matrix composites reinforced with Ti-Cu-Co-M (M: Ni, Zr) amorphous-nanocrystalline powder

Development of novel ultrafine grain cu metal matrix composites reinforced with Ti-Cu-Co-M (M: Ni, Zr) amorphous-nanocrystalline powder

Preparing and Wear-Resisting Property of Al2O3/Cu Composite Material Enhanced Using Novel In Situ Generated Al2O3 Nanoparticles

Influence of Oxide Dispersoids on the Structure Development of Copper Nanocomposite Prepared by Spark Plasma Sintering Technology

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