Title :
Phase transformation in melt layer of CuCr contact materials after breaking operations
Author :
Yang, Zhimao ; Yan, Qun ; Ding, Bingjun ; Wang, Xiaotian
Author_Institution :
Sch. of Mater. Sci. & Eng., Xian Jiaotong Univ., China
Abstract :
The particles and melt layer on the surface of a contact play an important role in the contact performance. In this paper, the surface and the cross section of a CuCr50 contact after breaking operations were observed by SEM and TEM. Experimental results show that Cu and Cr particles were different on the surface of the contact and Cr particles were smaller than those precipitated from the melt layer. Distribution of Cu and Cr in the melt layer is also discussed.
Keywords :
chromium alloys; copper alloys; electrical contacts; vacuum interrupters; CuCr; CuCr contact materials; SEM; TEM; breaking operations; melt layer; particles; phase transformation; precipitation; surface; Chromium alloys; Contacts; Cooling; Copper; Dielectric breakdown; Interrupters; Materials science and technology; Surface cracks; Switches; Temperature dependence;
Conference_Titel :
Electrical Contacts, 1995., Proceedings of the Forty-First IEEE Holm Conference on
Conference_Location :
Montreal, Quebec, Canada
Print_ISBN :
0-7803-2728-4
DOI :
10.1109/HOLM.1995.482877
