Electrical Properties of Ag-C Contact Materials Containing Different Allotropes of Carbon

Borkowski, P.; Walczuk, E.; Wójcik-Grzybek, D.; Frydman, K.; Zasada, D.

doi:10.1109/holm.2010.5619544

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…However, it was reported that the addition of oxides lowers the thermal conductivity (TC) [1][2][3][4][5] while the presence of graphite degrades the mechanical properties. 1,[6][7][8] Therefore, the creation of multifunctional composed of nano-carbon reinforcement such as graphene (G) or reduced graphite oxide (rGO) may fulfill these unmet needs. [9][10][11][12][13][14][15] Nonetheless, the size difference between the matrix powder (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Silver/reduced graphene oxide nanocomposite materials synthesized via a green molecular level mixing

Silvain

Thomas

Constantin

et al. 2023

Journal of Composite Materials

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The fabrication of nano reinforced metal matrix composites (MMCs) is scientifically essential to further upgrade the thermal, electrical, and mechanical properties of current MMCs. Here, we present a green molecular mixing (MLM) of silver (Ag) and graphene (G) to overcome these challenges. Experimental results show that the green MLM allows to homogeneously mix 3 vol. % of G as observed with traditional MLM while adding a control on the oxidation steps. Metal and GO reductions can be precisely control by varying the solution temperature. Highly thermal conductivity and strong elastic modulus nanocomposites are fabricated making it an eco-friendlier mixing process.

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Section: Introductionmentioning

confidence: 99%

“…However, it was reported that the addition of oxides lowers the thermal conductivity (TC) 1–5 while the presence of graphite degrades the mechanical properties. 1,6–8…”

Section: Introductionmentioning

confidence: 99%

Silver/reduced graphene oxide nanocomposite materials synthesized via a green molecular level mixing

Silvain

Thomas

Constantin

et al. 2023

Journal of Composite Materials

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“…Silver-based composites have been widely used as electrical contact materials for several decades due to their outstanding electric properties [1,2]. Among them, AgC composites are most attractive because of their outstanding electrical conductivity, low contact resistance, good resistance to fusion welding, and excellent lubrication performance [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Post-Treatments on Arc Erosion Resistance of Cold-Sprayed AgC Composite Electric Contact

Zhou

Liu

et al. 2021

Coatings

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Graphite-silver (AgC) composite materials are widely used in outdoor high-voltage electrical switchgear due to their combining properties of excellent conductivity and outstanding arc-suppressing performance. However, the methods for fabricating AgC composite materials still have some limitations. In this study, the cold spray technique was adopted to deposit AgC composite coatings with the optimized parameters on the copper substrate. Then, AgC coatings were annealed in the furnace and treated by laser scanning, respectively, to further improve the arc erosion resistance performance of the coatings. The results show that the phase structure and electrical resistance of AgC coatings were not influenced by the post-treatment process. Furthermore, excellent hydrophobic performance was obtained after surface laser scanning treatment. The laser scanning treatment exhibited favorable advantages in enhancing the arc erosion resistance of AgC coatings, which indicated the lowest arc erosion rate compared with the cold-sprayed and annealed coatings.

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“…For silver-based composites with a reinforcing phase in the form of carbon, i.e. graphite, diamond or glassy carbon, a three-stage formation process, including pressing, sintering and repressing [2,3,14], is usually selected. Ag-C contact materials having density close to the theoretical value are produced using spark plasma sintering (SPS) [15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Forms on Properties of Ag-C Composites Contact Materials

Pietrzak

Frydman

Wójcik-Grzybek

et al. 2018

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This paper presents the manufacturing method of silver based composite materials containing 3 % vol. carbon forms (nanotubes and graphene). The most significant challenge was to obtain good dispersion of carbon in the metallic matrix. The applying of suitable dispersants allows to get uniform distribution of carbon reinforcement. Triton X-100 and ultrasonic support were used in the powder mixing process. Ag-nanotubes and Ag-graphene contact tips were made using Spark Plasma Sintering process (SPS). The results of research into both physical and electrical properties of these composites are presented. It has been demonstrated that the form of introduced carbon exerts influence on the electrical characteristics of contacts, and particularly on arc erosion. Performed electrical test indicated that Ag-nanotubes contacts showed higher resistance to arc erosion than Ag-graphene contacts. It can be explained by the better dispersion to individual carbon nanotubes their lower than for graphene edge defects density and due to this higher thermal and electrical conductivity.

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Electrical Properties of Ag-C Contact Materials Containing Different Allotropes of Carbon

Cited by 6 publications

References 8 publications

Silver/reduced graphene oxide nanocomposite materials synthesized via a green molecular level mixing

Silver/reduced graphene oxide nanocomposite materials synthesized via a green molecular level mixing

Effects of Different Post-Treatments on Arc Erosion Resistance of Cold-Sprayed AgC Composite Electric Contact

Effect of Carbon Forms on Properties of Ag-C Composites Contact Materials

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