| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7210695 | Rare Metal Materials and Engineering | 2016 | 5 Pages |
Abstract
La2Sn2O7/SnO2 composite powder was synthesized by chemical co-precipitation, and Ag-La2Sn2O7/SnO2 electrical contact material was prepared by a powder metallurgy method. Anti-arc erosion properties, mass loss and Vickers hardness of the Ag-La2Sn2O7/SnO2 composite were investigated, and its anti-arc erosion mechanism was discussed. Results show that the welding force of Ag-La2Sn2O7/SnO2 composite is much better than that of Ag-SnO2, because the new phase La2Sn2O7 can increase the viscosity of melt pool and improve wettability between silver and tin oxide to some extent. Meanwhile, Flatter arcing area and “beads-like” particles embedded scatteredly in the surface could decentralize arc energy via “pinning effect”, which decreases temperature rise and weakens the damage of surface structure, and better anti-welding property is obtained. Ag-La2Sn2O7/SnO2 composite could be a leading candidate material for electrical contacts in the future.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Mechanics of Materials
Authors
Zhang Lingjie, Shen Tao, Shen Qianhong, Zhang Ji, Chen Lawson, Fan Xianping, Yang Hui,