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| 1 | Arc erosion of AgSnO_2 electrical contacts at different stages of a break operation显示文摘Arc erosion studies are conducted on AgSnO2 contact materials at different stages in the break operation.A resistive load arrangement is used with up to 42 V DC at 24 A and a constant contact opening velocity.The arc current is terminated at different stages as the arc is drawn between the contacts enabling a study of the arcing phenomena up to that point.Surface profiling of the contacts is conducted to determine the extent of erosion at the different stages as the arc is drawn.Spectral analysis is also conducted on the arc and then related to the extent of erosion.The results show that particular features occur at different stages as the arc is drawn.As the arc is initially established,it goes through an 'Arc Generation' regime where the arc roots are small and immobile on both the anode and the cathode.Material transfer occurs mainly from anode to cathode.The spectral analysis indicates that Sn and O species dominate the arc followed by the Ag species.As the arc is drawn further and enters the 'Arc Degeneration' regime,the anode undergoes significantly larger erosion than the cathode.Also,both contacts indicate that multiple arc roots have formed,which are highly mobile in the later stages of the discharge.The spectral analysis indicates that Ag and N species are in high concentrations compared to other species.The mechanisms of erosion and deposition are discussed in relation to the species within the arc discharge.For the complete break operation,it is found that the anode undergoes major erosion,and it is thought that the gaseous ions species do not dominate the arc under these conditions of short arcs and voltage <42 V to cause cathode erosion. | J. Swingler A. Sumption | 2010 | Rare Metals2010，29，3： | 40 |
| 2 | 掺杂对Cu/SnO_2电触头材料的性能影响显示文摘通过高能球磨工艺制备了掺杂Cu/Sn O2电触头材料,采用XRD评估了Cu/Sn O2的混粉效果,利用SEM对电触头材料的微观形貌以及电弧烧蚀形貌进行了观察,测试了电触头材料的电导率和硬度,系统研究了混粉时间、烧结温度以及不同掺杂对Cu/Sn O2电触头材料的性能影响。结果表明:Cu/Sn O2混粉时间4h,850℃烧结的Cu/Sn O2电触头材料物理性能最佳,其电导率达到49.0%IACS,硬度达到122.0HV;添加La2O3的Cu/Sn O2电触头材料的电弧烧蚀轻微,具有良好的耐电弧烧蚀特性。 | 赵文杰 王俊勃 王瑞娟 王彦龙 刘松涛 胡泽涛 | 2015 | 航空材料学报2015，35，6： | 5 |
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