Simulation Calculation and Experimental Study on the Properties of Re-, In-, and Nb-Doped Ag/Ni Electrical Contact Materials

Wang, Jingqin; Wang, Menghan; Zhang, Yixuan

doi:10.1109/tcpmt.2024.3380061

Cited by 2 publications

(2 citation statements)

References 29 publications

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“…AgNi electrical contact materials all generate electrical arcs during the opening and breaking processes. The contact surface undergoes a series of physical and chemical changes, such as melting, evaporation, and spattering, under the action of the arc [8]. The structure of AgNi contact materials without additives is very simple.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nb Doping on the Electrical Contact Properties of AgNi Contact Materials

Wang,

Chen

et al. 2024

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AgNi contact materials have received widespread attention with the acceleration of the process of replacing AgCdO contact materials. However, the practical applications of AgNi contact materials are limited due to its disadvantage of poor resistance to melting welding. Firstly, following the first principles of the density functional theory, we simulated and tested an interfacial model of AgNi doped with varying amounts of Nb. Next, we fabricated AgNi electrical contact materials. Subsequently, we conducted electrical contact tests. Finally, the impact of Nb doping on the arc erosion behavior of AgNi electrical contact materials was analyzed. The results indicate that, with an increase in Nb doping content, the electrical contact performance and the degree of arc erosion exhibit a trend of initially decreasing and then increasing, which aligns with the simulation results. The mean values of arc energy, arc duration, and welding force for the material doped with 4.55% Nb were 181.02 mJ, 9.43 mS, and 38.45 cN, respectively. Moreover, the anode is more responsive to changes in Nb content compared to the cathode. The introduction of Nb enhances the viscosity of the molten pool in the AgNi electrical contact. Furthermore, the mechanisms of grain boundary strengthening and solid solution strengthening by Nb improve the weld performance resistance of the contact.

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Section: Introductionmentioning

confidence: 99%

Effect of Nb Doping on the Electrical Contact Properties of AgNi Contact Materials

Wang,

Chen

et al. 2024

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“…Some scholars have investigated that elemental doping can improve the electrical conductivity, arc erosion resistance, and other properties of AgNi electrical contact materials. For example, Wang et al doped AgNi electrical contact materials with Re, In, and Nb elements, which led to an improvement in the micro-morphology of the contact surfaces and arc performance of the AgNi contact materials [16]. Lin et al demonstrated that the addition of rare-earth elements to the contact materials could result in the formation of rare-earth oxides, which could be suspended in the molten silver pool at high temperatures [17].…”

Section: Introductionmentioning

confidence: 99%

First-Principles and Experimental Study of Ge, V, Ta-Doped AgNi Electrical Contact Materials

Wang,

Zhang,

Wang

et al. 2024

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To explore the stability, electrical, and mechanical characteristics of undoped AgNi alongside AgNi doped with elemental Ge, V, and Ta, we performed calculations on their electronic structures using density functional theory from first-principles. We also prepared AgNi(17) and AgNi-x(Ge, V, Ta) electrical contact materials using the powder metallurgy technique, and they were subsequently assessed experimentally. The electrical properties of these materials were evaluated under a 24 V/15 A DC-resistive load using the JF04D contact material testing system. A three-dimensional morphology scanner was employed to examine the contact surface and investigate the erosion patterns of the materials. Our findings indicate that doping with metal elements significantly enhanced the mechanical properties of electrical contacts, including conductivity and hardness, and optimizes arc parameters while improving resistance to arc erosion. Notably, AgNi-Ge demonstrated superior conductivity and arc erosion resistance, showing significant improvements over the undoped AgNi contacts. This research provides a theoretical foundation for selecting doping elements aimed at enhancing the performance of AgNi electrical contact materials.

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Simulation Calculation and Experimental Study on the Properties of Re-, In-, and Nb-Doped Ag/Ni Electrical Contact Materials

Cited by 2 publications

References 29 publications

Effect of Nb Doping on the Electrical Contact Properties of AgNi Contact Materials

Effect of Nb Doping on the Electrical Contact Properties of AgNi Contact Materials

First-Principles and Experimental Study of Ge, V, Ta-Doped AgNi Electrical Contact Materials

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