Arc erosion behavior of Ag/Ni electrical contact materials

Wu, Chunping; Yi, Danqing; Weng, Wei; Li, Suhua; Zhou, Jiemin; Zheng, Feng

doi:10.1016/j.matdes.2015.06.142

Cited by 62 publications

(14 citation statements)

References 9 publications

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“…Electrical contact materials are the key materials widely applied in the field of electrical switches such as relays, contactors, and circuit breakers. − They usually require good electrical and thermal conductivity, low and stable contact resistance, high wear resistance and welding resistance, good chemical stability, and certain mechanical strength. , Nanostructured metallic multilayers (NMMs) can be applied as excellent electrical contact materials, because they have a large number of interfaces parallel to the substrate’s surface, which can hinder the movement of dislocations and inhibit the propagation of cracks and thus enhance the toughness, wear resistance, and hardness of the material. , Moreover, due to the small grain size, nanomaterials have the ability to effectively disperse the arc, which makes NMMs exhibit even better welding resistance. In recent years, researchers have obtained a lot of constructive research results, − including the interface orientation relationship, strength, and hardness of multilayer films.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Stability and Electronic Properties of Ag/M (M = Ni, Cu, W, and Pd) and Cu/Cr Interfaces

Cheng

Zhang

et al. 2018

J. Phys. Chem. C

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The work of separation (W sep), interface energy (γint), and electronic properties of Ag/M (M = Ni, Cu, W, and Pd) and Cu/Cr interfaces are systematically studied by using first-principles calculations. Three criteria, W sep, γint, and the quantum conductivity (G), have been proposed for the suitable electrical contact materials. The results indicate that Ag(111)/Ni(111), Ag(100)/W(100), and Ag(111)/W(110) interfaces have comparatively larger W sep and lower positive γint among all the interfaces, which demonstrates that Ag/Ni and Ag/W interfaces are more suitable as nano-multilayer electrical contact materials than other interfaces. Moreover, the Ag(111)/Ni(111) interface has the largest G and the best dispersing arc ability among these three interfaces, and thus, it is chosen as the best candidate for the interface of nano-multilayer electrical contact material.

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Section: Introductionmentioning

confidence: 99%

Interfacial Stability and Electronic Properties of Ag/M (M = Ni, Cu, W, and Pd) and Cu/Cr Interfaces

Cheng

Zhang

et al. 2018

J. Phys. Chem. C

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“…The high energy dissipated by the electric arc melted the surface layers of the contact, generating regions rich in Ag (Zone A) and sectors with a high concentration of Zn, Sn, and O (Zone B). The appearance of these segregated areas could be explained by the poor wettability between the oxides (ZnO/SnO 2 ) and molten Ag [ 57 ]. Additionally, small spheres with diameters ranging from several hundred nanometers to ~10 µm can be observed on the surface, which presented a high Ag concentration.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Arc Erosion Behavior of Ag-SnO2-ZnO Electrical Contact Materials

et al. 2023

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This study investigated the synthesis of Ag-SnO2-ZnO by powder metallurgy methods and their subsequent electrical contact behavior. The pieces of Ag-SnO2-ZnO were prepared by ball milling and hot pressing. The arc erosion behavior of the material was evaluated using homemade equipment. The microstructure and phase evolution of the materials were investigated through X-ray diffraction, energy-dispersive spectroscopy and scanning electron microscopy. The results showed that, although the mass loss of the Ag-SnO2-ZnO composite (9.08 mg) during the electrical contact test was higher than that of the commercial Ag-CdO (1.42 mg), its electrical conductivity remained constant (26.9 ± 1.5% IACS). This fact would be related to the reaction of Zn2SnO4’s formation on the material’s surface via electric arc. This reaction would play an important role in controlling the surface segregation and subsequent loss of electrical conductivity of this type of composite, thus enabling the development of a new electrical contact material to replace the non-environmentally friendly Ag-CdO composite.

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“…Increase of vacancy and dislocation density will decrease grain boundary intensity, which increases the possibility of grain boundary crack formation under stress action [14] . As shown in Fig.…”

Section: Surface Morphology Analysismentioning

confidence: 99%

Arc erosion behavior of La-doping titanium-zirconium-molybdenum alloy

Wang

et al. 2016

Journal of Alloys and Compounds

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La-doping titanium-zirconium-molybdenum alloys have good arc erosion resistance performances, but there is no research about the changes during the arc erosion. Arc erosion characteristics of La-doping titaniumzirconium-molybdenum alloys after 5000 operations under direct current 20 V, 15 A and resistive load conditions were investigated using a JF04C test system. The results indicated that the probability distribution and change trend of arc energy and arc time during 5000 operations were similar and the relationship between arc time and arc energy followed exponential function. The change of arc energy with test number was consistent to electrical resistance. Oxide particles, crater and cracks defects were discovered on the surface of La-doping titanium-zirconium-molybdenum alloy. The electrical resistance change is mainly concerned with the surface. Abstract: La-doping titnaium-zirconium-molybdenum (La-TZM) alloys have excellent performances such as high temperature strength, adequate thermal conductivity, low contact resistance and good arc erosion resistance. In this paper, the arc erosion behavior of a La-TZM alloy was studied at direct current (DC) 20V-15 A (voltage is 20 and current is 15) using a JF04C test system. Results show that the arc energy and the arc time present exponential relationship and the tendency of arc energy with test number were consistent to that of electrical resistance. Improvement of the contact pressure can effectively reduce the resistance. After the test, La-TZM was corroded with some micro-pores and micro-cracks on the surface. In addition, Mo 4 O 11 , Mo 8 O 23 and MoO 3 were formed on the surface, and the volatile of MoO 3 resulted in the reduced weight.

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Arc erosion behavior of Ag/Ni electrical contact materials

Cited by 62 publications

References 9 publications

Interfacial Stability and Electronic Properties of Ag/M (M = Ni, Cu, W, and Pd) and Cu/Cr Interfaces

Interfacial Stability and Electronic Properties of Ag/M (M = Ni, Cu, W, and Pd) and Cu/Cr Interfaces

Fabrication and Arc Erosion Behavior of Ag-SnO2-ZnO Electrical Contact Materials

Arc erosion behavior of La-doping titanium-zirconium-molybdenum alloy

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