An electroless plating and planetary ball milling process for mechanical properties enhancement of bulk CNTs/Cu composites

Song, Jiulong; Chen, W.G.; Dong, Longlong; Wang, J.J.; Deng, Nan

doi:10.1016/j.jallcom.2017.05.208

Cited by 55 publications

(19 citation statements)

References 28 publications

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“…Details of the preparation procedure can be found in our previous paper 29 . Composite powders of Cu-coated graphene (Cu@Gr) were synthesized using an electroless plating method 30 . Commercially available Cu powders (99.7% purity and particle size <53 nm) and W powders (purity ≥99.9% and average particle size of 5~7μm,) were bought from Sinopharm Chemical Reagent Co., Ltd., China.…”

Section: Experimental Methodsmentioning

confidence: 99%

Synergistic enhancing effect for mechanical and electrical properties of tungsten copper composites using spark plasma infiltrating sintering of copper-coated graphene

Chen

Dong

Wang

et al. 2017

Sci Rep

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Successful applications of WCu alloys in high voltage electrical switches require their high strength and excellent conductivity. Unfortunately, the strategies for increasing their strength such as doping with fine particles and alloying often significantly decrease their conductivity. In this paper, we developed a new pathway for fabricating WCu alloys using spark plasma infiltrating sintering of copper-coated graphene (Cu@Gr) composite powders. Cu@Gr was found to partially prevent the formation of WC after sintering, and graphene was uniformly distributed on the surfaces of network Cu phases. Electrical conductivity of 38.512 M·S/m, thermal conductivity of 264 W·m−1·K−1 and microhardness of 278 HV were achieved for the sintered WCu composites doped with only 0.8 wt.% Cu@Gr powders, which showed 95.3%, 24.3%, 28% enhancement compared with those from the conventional sintering using the undoped WCu powders.

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Section: Experimental Methodsmentioning

confidence: 99%

Synergistic enhancing effect for mechanical and electrical properties of tungsten copper composites using spark plasma infiltrating sintering of copper-coated graphene

Chen

Dong

Wang

et al. 2017

Sci Rep

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“…Because graphene nanosheets do not have catalytic activity, making the chemical plating of graphene possible, they need to absorb some catalytically active films or particles on the graphene's surface. This process is called sensitization and activation [99]. There is no consistent explanation about the principle of chemical plating.…”

Section: Chemical Platingmentioning

confidence: 99%

Recent Developments Concerning the Dispersion Methods and Mechanisms of Graphene

et al. 2018

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Graphene, as a reinforcement for composite materials, has become a focus recently. However, the dispersion of graphene in composite materials is a problem that has been difficult to solve for a long time, which makes it difficult to produce and use graphene-reinforced composites on a large scale. Herein, methods to improve the dispersion of graphene and dispersion mechanisms that have been developed in recent years are reviewed, and the advantages and disadvantages of various methods are compared and analyzed. On this basis, the dispersion methods and mechanisms of graphene are prospected, which lays the foundation for graphene application and preparation.

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“…On one hand, TTA could react with oxygen and Cu + to inhibit the precursor required for the formation of Cu 2 S, which Irgamet 39 does not have. On the other hand, the protective film formed by Irgamet 39 on the copper windings is very strong and resistant to high temperatures or oxidization, which TTA does not have [17]. T571 is a passivator made up of Irgamet 39 and a small amount of antioxidants, therefore its purity is lower than Irgamet 39 [8].…”

Section: Oil-paper Insulation Aging Experiments On Multiple Corrosmentioning

confidence: 99%

Protective Performance of Different Passivators on Oil-Paper Insulation Containing Multiple Corrosive Sulphides

et al. 2019

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The problem of sulfur corrosion has seriously affected the safe and stable operation of the power transformers. Currently, adding passivators into the transformer oil is the most effective method to suppress the problem. However, no explicit provisions have been made for the optimum concentration of the specific passivators. In this paper, the transformer oils with different corrosive sulfurs and different aging degrees were used to study the protective performance of three different passivators. By comparing the copper surface, the optimum concentrations for each passivators were acquired. Moreover, by testing the breakdown voltage, dielectric loss factor, volume resistivity, and moisture content of the insulating oil after adding passivators with the optimal concentration, the effect of three passivators on the oil quality was obtained. Results show that the three passivators have different protective performance on different types of corrosive sulfurs. Irgamet 39 has a better protective effect at lower concentrations than the other two. The protective effect of all three passivators on dodecyl mercaptan is poor, and a new type of passivator capable of protecting against dodecyl mercaptan needs to be developed. Moreover, the three passivators have different protection performance on the transformer oils with different aging degrees. The protective performance is poor especially for the oils with longer running years or passivators with lower concentrations. Among the three passivators, Irgamet 39 had the smallest impact on the oil quality, followed by T571 and then TTA. The above research can provide some references for guiding the passivator addition in actual projects and preventing the occurrence of sulfur corrosion failures.

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An electroless plating and planetary ball milling process for mechanical properties enhancement of bulk CNTs/Cu composites

Cited by 55 publications

References 28 publications

Synergistic enhancing effect for mechanical and electrical properties of tungsten copper composites using spark plasma infiltrating sintering of copper-coated graphene

Synergistic enhancing effect for mechanical and electrical properties of tungsten copper composites using spark plasma infiltrating sintering of copper-coated graphene

Recent Developments Concerning the Dispersion Methods and Mechanisms of Graphene

Protective Performance of Different Passivators on Oil-Paper Insulation Containing Multiple Corrosive Sulphides

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