论文信息 - Comparison of Reignition Properties of Several Ag/W, Ag/WC, and Ag/Mo Electrical Contact Materials

Comparison of Reignition Properties of Several Ag/W, Ag/WC, and Ag/Mo Electrical Contact Materials

The reignition properties of several Ag/W, Ag/WC, and Ag/Mo electrical contacts were compared in a static gap discharge system. The effects of refractory particle size, composition, and processing method were studied. Silver-molybdenum was found to have the least tendency to restrike. Silver-tungsten carbide contacts generally restruck more frequently than Ag/Mo and Ag/W and the number of restrikes increased with the refractory content. Restrike in silver-tungsten contacts was not as sensitive to the refractory content; however, the use of coarse tungsten increased the tendency to restrike. The processing method had a significant influence on the number of restrikes of Ag/W contacts. In particular the press-sinter contacts processed at below the melting temperature of silver showed a high probability of reignition.

Chi-Hung Leung | P. Wingert | Han Kim

[1] Effect of the electric arc and the ambient air on the contact resistance of silver, tungsten, and silver-tungsten contacts , 1976 .

[2] E. Pfender,et al. Chapter 5 – Electric Arcs and Arc Gas Heaters , 1978 .

[3] W. Warke,et al. A Correlation of Material Toughness, Thermal Shock Resistance, and Microstructure of High Tungsten, Silver-Tungsten Composite Materials , 1975 .

[4] M. Lindmayer. Effect of Work Function and Ionization Potential on the Reignition Voltage of Arcs Between Ag/Metal Oxide Contacts , 1981 .

[5] Eoin W. Gray,et al. Electrode erosion by particle ejection in low‐current arcs , 1974 .

[6] C. Haque,et al. Work Function Changes on Contact Materials , 1974 .

[7] Chi-Hung Leung,et al. A Comparison of Ag/W,Ag/WC, and Ag/Mo Electrical Contacts , 1984 .

[8] Chi-Hung Leung,et al. Effects of Processing Methods on the Contact Performance Parameters for Silver-Tungsten Composite Materials , 1982 .