使用电沉积方法在铜基表面制备了银石墨复合镀层,研究了沉积电流密度对银石墨复合镀层耐蚀和耐磨性能的影响.研究表明,镀层的石墨面积分数随着沉积电流密度的上升而增大;沉积电流密度对自腐蚀电位的影响不大,沉积电流密度的增加使得自腐蚀电流密度增大;在0.1~0.5 A/dm2范围内,随着电流密度的增加,复合镀层的平均摩擦系数减小,磨损率先减小后增大.当沉积电流密度为0.3 A/dm2、搅拌速度为420 r/min时,复合镀层的磨损率最小,为8.13×10-14 m-3/N?m.该条件下制备的触头触指分合10000次后,在触头的面状低副摩擦中,其镀层厚度迁移量小于2μm;在触指的线状高副摩擦中,其镀层磨损量小于10μm.
In this paper,the silver-graphite composite coatings were prepared on copper substrate by the electro-deposition method.The influence of deposition current density on the corrosion resistance and wear resistance of the silver graphite composite coating was particularly investigated.This study indicated that the area fraction of the coated graphite increased with the rise of deposition current density.The self-corrosion potential was less likely to be affected by deposition current density.However,the increase of deposition current density was to accelerate the self-corrosion current density.In 0.1-0.5 A/dm2 range,the average friction coefficient of compos-ite coating decreased and the wear rate decreased and then increased by the increment of current density.When the deposition current density was equal to 0.3 A/dm2 and stirring speed to 420 r/min,the wear rate of the coat-ing reached the minimum,namely 8.13×10-14 m-3/N?m.After contact terminal and contact finger prepared in the condition off operation of 10000 times,the migration amount of coating thickness for contact terminal in the planar low vice was less than 2μm and the abrasion loss in the linear high vice friction of contact finger was less than 10μm.
参考文献
| [1] | 向常桂;黄立才.户外隔离开关导电回路过热的原因及对策[J].湖北电力,2010(4):28-29. |
| [2] | 张霁月;孙正来;卫功存;朱兴刚;谢正勇;徐飞.GW4型隔离开关触头发热原因分析及措施[J].安徽电气工程职业技术学院学报,2014(1):16-19. |
| [3] | 曹胜利;苑金海;赵昌.户外高压隔离开关腐蚀与防护分析[J].电气制造,2007(6):46-48. |
| [4] | 张庆;成旦红;郭国才;郭长春;曹铁华.无氰镀银技术发展及研究现状[J].电镀与精饰,2007(5):12-16. |
| [5] | M. Grandin;U. Wiklund.Friction, wear and tribofilm formation on electrical contact materials in reciprocating sliding against silver-graphite[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,20131/2(1/2):1481-1491. |
| [6] | Xiaohong Yang;Shuhua Liang;Xianhui Wang.Effect of WC and CeO_2 on microstructure and properties of W-Cu electrical contact material[J].International Journal of Refractory Metals & Hard Materials,20102(2):305-311. |
| [7] | WANG Juan;FENG Yi;LI Shu;LIN Shen.Influence of graphite content on sliding wear characteristics of CNTs-Ag-G electrical contact materials[J].中国有色金属学会会刊（英文版）,2009(01):113-118. |
| [8] | 杨堃;宋杲;曹德新;和彦淼;林凡田;解守华.隔离开关触头寿命的试验研究[J].智能电网,2014(2):63-66. |
| [9] | Liu, N.;Qi, S.;Li, S.;Wu, X.;Wu, L..Preparation and characterization of phenol formaldehyde/Ag/graphite nanosheet composites[J].Polymer Testing,20114(4):390-396. |
| [10] | 吴振.户外高压隔离开关过热的原因及对策[J].机电信息,2010(24):89-90. |
| [11] | 王富勇;方瑞明;陈华贵.户外高压隔离开关电触头发热及其在线监测[J].宁夏工程技术,2011(2):135-139. |
| [12] | 郝丽丽 .铝合金表面Ni-P-β-SiC化学复合镀层制备及应用[D].西安科技大学,2013. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%