Characterization of Cu–Al2O3 nano-scale composites synthesized by in situ reduction

Motta, Marcelo; Jena, Premalata; Brocchi, E. A.; Solórzano, I. G.

doi:10.1016/s0928-4931(01)00272-7

Cited by 72 publications

(41 citation statements)

References 5 publications

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“…For instance, investigated by the TGA/ DSC method, Singh et al [13] observed a reduction in the ignition delay for bimetallic nanoalloys of Ni mixed with Cu, Co and Zn. Some studies have shown that nano aluminum particles (nAl) in combination with copper possessed some excellent properties and can be potentially used in resistance welding electrodes, electrical connectors, lead frames and the metastable intermolecular composites (MICs) [14][15][16][17]. However there is still no detailed study of the thermal-chemical kinetics of nano alloy of copper and aluminum (nano-AlCu).…”

Section: Introductionmentioning

confidence: 99%

Exothermic characteristics of aluminum based nanomaterials

et al. 2015

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Nano-structured energetic materials have been recently proposed as novel energy storage media where the exothermic reaction is the key to control the heat release process. The properties of nanoalloys, which can be engineered not only by the particle size, but also by varying their elemental compositions, are very appealing. This work conducts a comparative experimental study of the exothermic characteristics of two nanomaterials in the air, aluminum nanoparticles (nAl) and aluminum-copper nanoalloys (nano-AlCu) based on TGA/DSC studies. The results show that the general exothermic characteristics of nano-AlCu are very similar to that of nAl but the nano alloy is more reactive. The nano-AlCu oxides and ignites at lower temperature, and influenced by the heating rate. An early ignition is found for both nanomaterials, and melting of the nano-alloy is believed to be responsible for its early ignition.

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Section: Introductionmentioning

confidence: 99%

Exothermic characteristics of aluminum based nanomaterials

et al. 2015

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“…Since Cu metal matrix materials are expected to have special physical and mechanical properties, studies on the synthesis and characterization of Cu metal matrix composites have attracted increasing interest. Al 2 O 3 [3][4][5][6] particles and Cr precipitates reinforced Cu have been investigated for their excellent properties.…”

Section: Introductionmentioning

confidence: 99%

An investigation on morphology and structure of Cu-Cr-Al2O3 powders prepared by mechanical milling

Shen

Zhu²,

et al. 2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

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Abastract：In this study, the effect of the milling time on microstructure of Cu-0.5 wt.% Cr-1 wt.% Al 2 O 3 was investigated. The lattice parameter was evaluated by the X-ray diffraction technique. The microstructure was characterized by scanning electron microscopy. Also, size and distribution of Cr and Al 2 O 3 were investigated by using X-rays energy dispersive (EDX) mapping. The result shows that the lattice parameter of the Cu phase increases with increasing milling time. The changing trend of Cu particle sizes as the alloying time increases, the particle sizes first increase and then decrease. When milling 1.5h, the powders coarsen than as-received Cu powder. Then the particle sizes of the samples decreased when the milling time increased to 3h and above. In addition, the size and distribution of Cr and Al 2 O 3 decreased and dispersed much fine with increasing milling time.

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“…[3] Therefore, the in situ composites exhibit higher mechanical strength, increased hardness, and enhanced wear resistance compared to the conventional ex situ composites. [5][6][7] Current studies on the in situ copper composite are mainly focusing on a few families such as oxides and borides reinforced materials. [3,[7][8][9] In particular, metal borides in copper matrix are considered as preferable choices because any excess of boride forming elements would precipitate with boron rather than remain in copper solid solution, thereby adversely affect electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Features and Mechanical Properties of In Situ Formed ZrB₂/Cu Composites

Zhang

Sheng

et al. 2015

Adv Eng Mater

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In situ reinforced copper matrix composites with improved mechanical properties are promising materials for various applications. In this work, an attempt has been made to explore the microstructural features and properties of in situ formed ZrB 2 /Cu composites using a liquid metallurgy route. XRD, SEM, XPS, and TEM analysis were used for micro-structural characterization. The results showed that ZrB 2 particles could form through the reaction of Zr and B in molten Cu. The obtained composites consisted of hexagonal shaped ZrB 2 and Cu(Zr) solid solution matrix. The in situ ZrB 2 /Cu composites exhibited improved microhardness. However, the electrical conductivity decreased with increasing weight fractions of ZrB 2 .

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Characterization of Cu–Al2O3 nano-scale composites synthesized by in situ reduction

Cited by 72 publications

References 5 publications

Exothermic characteristics of aluminum based nanomaterials

Exothermic characteristics of aluminum based nanomaterials

An investigation on morphology and structure of Cu-Cr-Al2O3 powders prepared by mechanical milling

Microstructural Features and Mechanical Properties of In Situ Formed ZrB₂/Cu Composites

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Characterization of Cu–Al2O3 nano-scale composites synthesized by in situ reduction

Cited by 72 publications

References 5 publications

Exothermic characteristics of aluminum based nanomaterials

Exothermic characteristics of aluminum based nanomaterials

An investigation on morphology and structure of Cu-Cr-Al2O3 powders prepared by mechanical milling

Microstructural Features and Mechanical Properties of In Situ Formed ZrB2/Cu Composites

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Product

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Microstructural Features and Mechanical Properties of In Situ Formed ZrB₂/Cu Composites