银-氧化镉电触头材料及产品的研制

DEVELOPMENT OF Ag-CdO ELECTRODE CONTACT MATERIALS AND PRODUCTS

本文研究了Ag-CdO电触头材料不同含镉量及不同添加元素对触头材料的电阻率、硬度、密度的影响。结果表明,Ag-CdO触头材料含镉范围可较宽,但要严格控制添加元素的含量。同时从实验结果得出,镍细化晶粒效果好。碲的添加使合金电阻率明显增大,但可球化氧化物。本文还研究了内氧化工艺对使用性能的影响。结果表明,氧压在5.066×10~5～10.133×10~5Pa内氧化时间根据材料厚度不同而定,使用性能良好,达到国内先进水平。

The influence of the cadmium content and different element additives in Ag-CdO electrode contact materials on its resistivity, hardness and density was studied.The result shows that the cadmium content in Ag-CdO electrode contact materials may have a wide range and element additives must be strictly controlled. Nickel addition has a good effect on fining of grains, while tellurium addition makes the resistivity increase and the oxide spheroidize. The influence of internal oxidation on the usability was also...