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Rare Metals
Erschienen in: Rare Metals 1/2013

01.02.2013

Experiment and finite element method analysis mass erosion and transfer of Ag/La2NiO4-based electrical contacts during operation

verfasst von: Song Chen, Wei-Ming Guan, Kun-Hua Zhang, Zhi-Long Tan, Ming Xie

Erschienen in: Rare Metals | Ausgabe 1/2013

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Abstract

A uniform transient temperature field model of electrical contacts operation was found by analyzing the process of closing arc → constriction resistance Joule heat → breaking arc. Essential parameters of Ag/La2NiO4 electrical contact material for transient temperature field calculation were obtained through tests of electrical contact experimental instrument under 18 V DC in different currents, other correlation experiments, and calculation analysis. The finite element method was applied to solve the transient temperature field, and the features and distribution of the transient temperature field were obtained. The condition of material erosion and mass transfer can be forecasted by those calculation results. It is beneficial to research about the lifetime of Ag/La2NiO4 electrical material.

Graphical abstract

The two curves of current with product of maximum molten pool volume and lifetime of molten pool for break arc and close arc crossed between 20 and 25 A. Those curves are related with the mass transfer curves. Because the mass transfer was directly affected by molten pool volume and molten pool lifetime, the direction of mass transfer can be forecasted. The direction of mass transfer began to change from anode to cathode after current was larger than 20 A. These are consistent with the experimental results.
Vorheriger Artikel Friction and wear behaviors of Al2O3–13 wt%TiO2 coatings
Nächster Artikel Clicking ferrocene to halogenated boron-doped diamond surfaces

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Metadaten
Titel
Experiment and finite element method analysis mass erosion and transfer of Ag/La2NiO4-based electrical contacts during operation
verfasst von
Song Chen
Wei-Ming Guan
Kun-Hua Zhang
Zhi-Long Tan
Ming Xie
Publikationsdatum
01.02.2013
Verlag
Nonferrous Metals Society of China
Erschienen in
Rare Metals / Ausgabe 1/2013
Print ISSN: 1001-0521
Elektronische ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-013-0005-5

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