本实验全面研究了Ti3SiC2含量对Ag-Ti3SiC2接触材料电弧烧蚀行为的影响;Ag-Ti3SiC2复合材料经10 kV电弧烧蚀被分解氧化并形成AgO,TiO2和SiO2,在阴极表面形成突起、气孔、剥离和褶皱.随着Ti3 SiC2含量的增加,电弧在Ag-Ti3 SiC2复合材料烧蚀表面上分散激溅.在复合材料中加入30 vol.%的Ti3SiC2,Ti3SiC2的锁住效应可以将熔融的Ag封锁,有效地降低Ag基体的飞溅现象和电弧烧蚀对接触材料的侵蚀效应.
The influence of Ti3SiC2 content on the arc erosion behavior of Ag-Ti3SiC2 contact material was comprehensively investigated.After 10 kV arc erosion,the Ag-Ti3SiC2 composite decomposed and oxidized by the formation of AgO, TiO2, and SiO2. The morphologies of protrusions,pores,peelings,and folds formed on the cathode.With an increasing Ti3SiC2 content, the electric arc was more dispersed on the eroded surface of Ag-Ti3SiC2 composites.With 30 vol.% of Ti3SiC2 addition to the composite,the gridlock effect of Ti3SiC2 could lock the molten Ag tightly, which effectively reduced the splashing phenomenon of Ag matrix and the erosion effect of arc erosion on the contact material.