Fabrication and properties of a novel ZnO/Cu composite

Wang, Q.Z.; Cui, Chun Xiang; Lu, Dongmei; Bu, Shaojing

doi:10.1016/j.jmatprotec.2009.10.012

Cited by 13 publications

(5 citation statements)

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“…The interaction of free electrons and nucleus of metals is weak, therefore, free electrons can move easily without interruption and that's why the electrical conductivity of metals is quite good. But in carbides, the electrons are bonding firmly to the nucleus and can't move so easily and that's why these materials have low electrical conductivity 29,30 . So it can be justified that increasing the amount of carbide eventually leads to the reduction of electrical conductivity of the final composite.…”

Section: Resultsmentioning

confidence: 99%

“…Reduction of electrical conductivity by increasing the amount of TiC can be assessed from different aspects: (i) as it was mentioned, the intrinsic electrical resistance of TiC is one of the main reasons for this behavior, (ii) by increasing the amount of TiC, the density of the induced dislocations due to the variation between Al and TiC's thermal expansion coefficient, increases. The increase of dislocation's density leads to the electron scattering on the Al-TiC surface and as a result, causes the reduction of the electrical conductivity and at last, (iii) presence of TiC particles actually reduces the size of the matrix's grains which means the increase of grain boundaries 30 and finally the reduction of electrical conductivity.…”

Section: Resultsmentioning

confidence: 99%

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The Effect of Rapid Microwave Sintering Process on the Electrical Conductivity, Thermal Conductivity and Mechanical Properties of Al-TiC Composites

2018

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In this research, electrical conductivity, thermal conductivity and mechanical properties of the Al-TiC composites which were sintered via microwave-assisted process were investigated. The specimens were sintered for 3, 5 and 8 minutes. The results have shown that the sample which contains 4 vol. % TiC and was sintered for 8 minutes, has the highest electrical and thermal conductivities among the other obtained ones. Besides that, the sample which contains 8 vol. % TiC and was sintered for 3 minutes, has dedicated the highest hardness and density to itself. Scanning electron microscopy (SEM) micrographs have illustrated that by increasing the amount of TiC up to 12 vol. %, the agglomeration of particles occurs. The X-ray diffraction (XRD) investigations have shown that due to the short duration of the sintering process in the microwave method, there is no trace of TiO 2 and Al 4 C 3 as pernicious phases. According to the obtained results, it becomes clear that increasing the amount of TiC powder leads to the reduction of electrical and thermal properties of the samples and increasing the sintering duration, leads to the increase of the mentioned properties.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The Effect of Rapid Microwave Sintering Process on the Electrical Conductivity, Thermal Conductivity and Mechanical Properties of Al-TiC Composites

2018

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“…Moreover TiO 2 particles have a negative influence on the self-diffusion of Cu atoms during the sintering process of the composite. 16 It should be expected that both mechanical properties and electrical conductivity might be improved by further density increase, which should be possible to accomplish through plastic working, e.g. hot extrusion or hot pressing.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterisation of Cu–TiO₂nanocomposite produced by thermochemical process

2016

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Cu-TiO 2 nanocomposite powders were synthesised by thermochemical process. The composite powders (containing 0, 2.5, 5 and 7 wt-% of TiO 2 ), prepared by spray drying of the (aqueous) solution of copper nitrate and titanium nitrate followed by heat treatment at 9008C for 1 h and reduction in hydrogen atmosphere at 5008C for 1 h. The composite powders were prepared by cold pressing and then sintering at 9008C for 1 h. Studies on their microstructures have been carried out through X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Mechanical properties and electrical conductivity of sintered specimens were measured, and the effect of TiO 2 content on these properties was investigated. The results showed that the nanosized TiO 2 particles (with a diameter of about 10-30 nm) was successfully formed and dispersed within the copper matrix. By introducing TiO 2 particles up to 2.5 weight percept, the electrical conductivity wastage is very high.

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“…Fang et al [5] produced a Cu-8 at.% Cr composite by a combination of mechanical milling, mechanical alloying, and spark plasma sintering. In addition, a Cu-matrix composite reinforced by ZnO particulates was prepared via a powder metallurgy technique [6]. The hardness of the composite was significantly enhanced by the addition of ZnO.…”

Section: Introductionmentioning

confidence: 99%

Microstructure development of in situ porous TiO/Cu composites

Qin

Huang

Li³

et al. 2016

Journal of Alloys and Compounds

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Fabrication and properties of a novel ZnO/Cu composite

Cited by 13 publications

References 10 publications

The Effect of Rapid Microwave Sintering Process on the Electrical Conductivity, Thermal Conductivity and Mechanical Properties of Al-TiC Composites

The Effect of Rapid Microwave Sintering Process on the Electrical Conductivity, Thermal Conductivity and Mechanical Properties of Al-TiC Composites

Synthesis and characterisation of Cu–TiO₂nanocomposite produced by thermochemical process

Microstructure development of in situ porous TiO/Cu composites

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Fabrication and properties of a novel ZnO/Cu composite

Cited by 13 publications

References 10 publications

The Effect of Rapid Microwave Sintering Process on the Electrical Conductivity, Thermal Conductivity and Mechanical Properties of Al-TiC Composites

The Effect of Rapid Microwave Sintering Process on the Electrical Conductivity, Thermal Conductivity and Mechanical Properties of Al-TiC Composites

Synthesis and characterisation of Cu–TiO2nanocomposite produced by thermochemical process

Microstructure development of in situ porous TiO/Cu composites

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Synthesis and characterisation of Cu–TiO₂nanocomposite produced by thermochemical process