| 查看: 486 | 回复: 0 | ||
[资源]
Arc erosion behavior of the Al2O3-Cu/(W, Cr) electrical contacts
|
|
Arc erosion behavior of the Al2O3-Cu/(W, Cr) electrical contacts 弥散铜-（W，Cr）电接触复合材料电弧侵蚀 Al2O3-Cu/(25)W(5)Cr and Al2O3-Cu/(35)W(5)Cr electrical contact materials were fabricated by vacuum hot- pressing sintering and internal oxidation. The relative density, electrical conductivity, and Brinell hardness were measured. The microstructure was analyzed by scanning electron microscopy and transmission electron mi- croscopy. JF04C electrical contact testing apparatus were used to investigate the electrical contact performance of composites. Arc erosion morphologies were analyzed by scanning electron microscopy and three-dimensional profilometer. The material transfer as well as electrical contact performance were studied during contact make and break operations at 30 V DC with current between 10 and 30 A. It indicates that the nano-Al2O3 particles pinned dislocations. Material transfers from the cathode to the anode. With the melting, evaporation, and sputtering of Cu during arcing, W particles gather and generate needle-shaped skeletons. Finally, liquid droplets, needle-like structures, craters, and bulges were formed on electrode surfaces after arc erosion. Furthermore, their quantity and morphology are affected by tungsten content. When the content of W in the dispersed copper matrix increases from 25 wt% to 35 wt%, welding force is reduced during the steady operations. In addition, when the arc duration is greate  r than 8.86ms, the Al2O3-Cu/(35)W(5)Cr contact material has a shorter averagearc duration than Al2O3-Cu/(25)W(5)Cr at the same arc energy. |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : 1-s2.0-S1359836818323047-main(1).pdf
2018-10-23 08:14:40, 6.1 M
» 猜你喜欢
美国马里兰大学土木工程材料全奖博士招生
已经有27人回复
-
招收2026年秋季入学博士生1名（北京科技大学 力学超材料/机器学习/增材制造相关方向）
已经有21人回复
-
有机高分子材料论文润色/翻译怎么收费?
已经有169人回复
-
关于水泵叶轮及密封环材料的工艺研究方向的论文投稿
已经有11人回复
-
招收26年秋季入学博士生（北科大高精尖学院 力学超材料/机器学习/增材制造相关方向）
已经有18人回复
-
工程博士申博
已经有2人回复
-
求助纯蒙脱石、Na蒙脱石、Ca蒙脱石晶体结构CIF
已经有0人回复
-
江西理工大学稀土磁性功能材料与物理示范研究生导师创新团队
已经有10人回复
-
发光材料关于色纯度计算
已经有0人回复
-
Energy and Environmental Science 期刊投稿-手稿格式问题，可单栏自由格式吗
已经有0人回复
» 本主题相关商家推荐: (我也要在这里推广)
