Arc erosion behavior of a nanocomposite W-Cu electrical contact material

Chen, Wenge; Kang, Zhanying; Shen, Hongfang; Ding, Bingjun

doi:10.1016/s1001-0521(06)60011-9

Cited by 42 publications

(14 citation statements)

References 9 publications

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“…as well as high arc erosion to maintain contact integrity (Chen et al, 2006). Contacts are made of elemental metals, composites, or alloys which are made by the melt-cast method.…”

Section: Introductionmentioning

confidence: 99%

The investigation of contact performance of oxide reinforced copper composite via mechanical alloying

Güler

Evi̇n

2009

Journal of Materials Processing Technology

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“…as well as high arc erosion to maintain contact integrity (Chen et al, 2006). Contacts are made of elemental metals, composites, or alloys which are made by the melt-cast method.…”

Section: Introductionmentioning

confidence: 99%

The investigation of contact performance of oxide reinforced copper composite via mechanical alloying

Güler

Evi̇n

2009

Journal of Materials Processing Technology

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“…Thus, particle size, shape and distribution of W phase, microstructure homogeneity and amount of pores affect the electrical, mechanical and thermal properties of composite material. According to Chen et al 2005 6 , microstructure refinement is of great importance to improve the performance of contact materials, including mechanical strength and electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Obtaining and Characterization of W-Cu Composite Powder Produced by Mixing and Sintering of Ammonium Paratungstate (Apt) and Copper Nitrate

et al. 2017

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The objective of this work is obtaining W-30 wt% Cu composite powder from ammonium paratungstate hydrated (APT) and hydrated copper nitrate and investigating the influence of some production process parameters of W-30 wt% Cu in particles form which results in high sinterability and densification of W-30 wt% Cu composite. To achieve this objective, the powder was obtained by manually mixing the APT and copper nitrate and reducing under a hydrogen atmosphere at 800 °C and then compacting at 500 MPa and sintering in a tubular furnace at 1200 °C for 60 minutes. The obtained materials were characterized by XRD, SEM, EDS, particle size analysis, density and microhardness measurements. The composite powder showed a good homogenization of Cu in W with very fine and agglomerated particles and a mean crystallite size of 25.64 nm. SEM coupled with EDS with mapping analysis revealed a homogeneous distribution of Cu and W in the sintered sample. The composite had a relative density of 96.77% and a microhardness of 523.66 HV. Therefore the method of obtaining the composite powder is feasible to sinter W-30 wt% Cu powder due to a greater dispersion and homogenization of phases and the average particle size.

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“…Recently, it has been shown that a fine and homogenous dispersion of the reinforcement within the matrix phase leads to the desired electrical advantages like the arc stability and also a reduction of the arc-erosion rate of a contact. 3 Different methods like mechanical milling 4,5 , mechanochemical 6 and chemical precipitation 7 were applied to synthesize the particle-reinforced silver-matrix composites with a fine dispersion of the reinforcing phase.…”

Section: Introductionmentioning

confidence: 99%

Chemical synthesis and densification behavior of Ag/ZnO metal-matrix composites

Ardestani¹

2016

Mater. Tehnol.

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In this research, the chemical synthesis and densification behavior of Ag/ZnO metal-matrix composites were investigated. The initial precipitates were obtained by adding ammonium carbonate solution to silver and zinc nitrate solutions. The precipitates consisted of silver and zinc carbonates. The thermal behavior of the precipitates was studied using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The TGA curve showed three distinguishable mass-loss stages, related to the evaporation of physically adsorbed water and also the decomposition of silver and zinc carbonates into silver and zinc oxides, respectively. The mass-loss stages were associated with three endothermic reactions. According to the thermal-analysis results, the precipitates were calcined at 600°C. The compressibility behavior of the synthesized Ag/ZnO powders was evaluated using the Heckel, Panelli and Ge models. The compaction data of the powders was best fitted to the Heckel equation. The synthesized powders were sintered at 930°C. The results showed that by increasing the cold-compaction magnitude prior to sintering, the sinterability of the powders was enhanced. The microstructural evaluation of the synthesized composites carried out with a scanning electron microscope (SEM) confirmed a fine and homogenous dispersion of ZnO within the silver matrix. Keywords: Ag/ZnO composites, densification, thermal analysis, sintering V raziskavi je bilo preiskovano obna{anje Ag/ZnO kompozita na kovinski osnovi pri kemijski sintezi in zgo{~evanju. Za~etni izlo~ki so bili dobljeni z dodatkom raztopine srebrovega in cinkovega karbonata v raztopino amonijevega nitrata. Izlo~ki so bili sestavljeni iz srebrovega in cinkovega karbonata. Toplotno obna{anje izlo~kov je bilo posneto s termogravimetri~no analizo (TGA) in z diferen~no vrsti~no kalorimetrijo (DSC). TGA krivulja je pokazala stopnje ob~utne izgube mase, ki so bile povezane z uplinjanjem fizi~no adsorbirane vode in tudi z razgradnjo srebrovega in cinkovega karbonata v srebro in v cinkov oksid. Stopnje izgube mase so bile povezane s tremi endotermnimi reakcijami. Na podlagi rezultatov termoanalize so bili izlo~ki kalcinirani pri 600°C. Stisljivost sintetiziranega Ag/ZnO prahu je bila dolo~ena z uporabo Heckel, Panelli in Ge modelov. Podatki za kompaktiranje prahov so se najbolje ujemali s Heckel ena~bo. Sintetizirani prahovi so bili sintrani pri 930°C. Rezultati so pokazali, da pove~evanje obsega zgo{~evanja pred sintranjem pospe{uje sposobnost prahu za sintranje. Ocena mikrostrukture sintetiziranega kompozita z vrsti~no elektronsko mikroskopijo (SEM) je potrdila drobno in homogeno razporeditev ZnO v osnovi iz srebra.

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Arc erosion behavior of a nanocomposite W-Cu electrical contact material

Cited by 42 publications

References 9 publications

The investigation of contact performance of oxide reinforced copper composite via mechanical alloying

The investigation of contact performance of oxide reinforced copper composite via mechanical alloying

Obtaining and Characterization of W-Cu Composite Powder Produced by Mixing and Sintering of Ammonium Paratungstate (Apt) and Copper Nitrate

Chemical synthesis and densification behavior of Ag/ZnO metal-matrix composites

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