Exploration of the Influence Mechanism of La Doping on the Arc Erosion Resistance of Ag/SnO2 Contact Materials by a Laser-Simulated Arc

Liu, Songtao; Sun, Qiaoyan; Wang, Junbo; Guo, Min; Hou, Haiyun

doi:10.1007/s11665-021-05966-z

Cited by 10 publications

(2 citation statements)

References 19 publications

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“…The electrical material produced using these approaches has presented a uniform and fine SnO 2 distribution in the Ag matrix. Alternatively, Wang et al [ 13 ], Liu et al [ 32 ] and Zhang et al [ 33 ] have used a milling process to improve the homogeneity of the initial powders. However, although the formation of a dense SnO 2 film can be avoided, the problems of poor wettability between SnO 2 and Ag and the loss of conductivity due to the addition of dopants persist.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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“…Wang et al [18] found that the addition of CuO to Ag/SnO 2 nanoparticles causes the Ag matrix to encapsulate the SnO 2 particles, which inhibits the redistribution of SnO 2 particles on the eroded surface during multiple actions of the arc. Liu et al [19] investigated the mechanism of the effect of added La on the anti-arc erosion properties of Ag/SnO 2 using laser-simulated arcs and found that La kept the La-doped SnO 2 particles uniformly dispersed in the Ag matrix under the action of the arc by preventing the increase in the size of SnO 2 particles, inducing the formation of smaller spherical particles of SnO 2 , as well as enhancing the interfacial bonding between Ladoped SnO 2 and the Ag matrix, thus reducing the material loss caused by the concentrated arc. Cao et al [20] showed that the arc duration and arc energy of Ag/La 2 Sn 2 O 7 /SnO 2 composites decreased and the breakdown strength increased with the increase in the content of La 2 Sn 2 O 7 at a voltage of 7 kV, and the breakdown strength also increased.…”

Section: Introductionmentioning

confidence: 99%

Break-Arc Erosion and Material Transfer Behavior of Pt–Ir and Pt–Ir–Y Electrical Contact Materials under Different Currents

Wang,

Sun

et al. 2023

Metals

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In order to explore the influence of rare earth element Y on the electrical contact properties of Pt–Ir alloys, Pt–10Ir–Y and Pt–25Ir–Y were prepared via arc melting combined with thermal processing, and electrical contact experiments were carried out with a DC voltage of 24 V and current ranging from 5 A to 25 A. Comparative analyses were conducted to analyze the changes in the break arc duration and arc energy, as well as the contact resistance before and after the addition of Y. The arc erosion surface morphology was characterized, and the transfer behavior of the alloys was discussed. The results show that at 5 A and 25 A, adding Y improves the stability of the arc duration of the Pt–Ir alloy, but it increases the overall arcing energy and decreases the stability. The contact resistance of the Pt–Ir alloy shows a clear partitioning phenomenon; the partitioning phenomenon disappears after the addition of Y, and the contact resistance fluctuates around the average value. The material transfer direction of the Pt–Ir alloy is affected by the current change, while the material transfer direction of the Pt–Ir–Y alloy is always from cathode to anode. The research results provide a reference for the performance optimization of Pt–Ir alloys.

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Laser direct fabrication graphene on silver-based contact as high-end electrical product

et al. 2023

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Exploration of the Influence Mechanism of La Doping on the Arc Erosion Resistance of Ag/SnO2 Contact Materials by a Laser-Simulated Arc

Cited by 10 publications

References 19 publications

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

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

Break-Arc Erosion and Material Transfer Behavior of Pt–Ir and Pt–Ir–Y Electrical Contact Materials under Different Currents

Laser direct fabrication graphene on silver-based contact as high-end electrical product

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