加压内氧化法制备银金属氧化物复合材料的电接触行为

Electrical contact behaviour of silver metal oxides composites prepared by pressurized internal oxidation

采用相同工艺条件的加压内氧化法制备出3种不同组分的Ag-Sn O2,Ag-Cd O及Ag-Cu O复合材料.研究了不同金属氧化物种类对复合材料电接触行为和性能的影响,并分析了复合材料的显微组织、导电率、显微硬度、侵蚀量、温升和电弧侵蚀表面情况.结果表明:与Ag-Cd O和Ag-Cu O材料相比,在220 V/10 A电接触条件下,Ag-Sn O2材料表现出更好的耐电弧侵蚀性能和更低的温升.金属氧化物的种类显著影响复合材料的组织均匀性、导电率、温升和侵蚀量.Ag-Sn O2和Ag-Cd O材料的电弧侵蚀表面光滑、均匀,而Ag-Cu O材料表面坑洼、粗糙.

Compositions with three different components of Ag-Sn O2, Ag-Cd O and Ag-Cu O are prepared by pressurized internal oxidation process under same processing conditions. The effect of metal oxides on the electrical contact behaviour and performance of the composites is investigated. The microstructure, electrical conductivity, microhardness, erosion loss, temperature raise and arc erosion surface are analyzed. The results show that Ag-Sn O2 exhibits better anti-arc erosion performance and lower temperature raise under 220 V/10 A contact condition as compared with Ag-Cd O and Ag-Cu O. The metal oxides influence significantly the structural uniformity, electrical conductivity, temperature raise and erosion loss of above composite. The arc erosion surfaces of Ag-Sn O2 and Ag-Cd O are relatively smooth and uniform, while that of Ag-Cu O is coarse and rough.