Microstructure and properties of vacuum electron beam facing CuCr25 contact material

On Increased Arc Endurance of the Cu–Cr System Materials

“…However, lately, a composite material based on the Cu-Cr system has been frequently used in arc-extinguishing contacts [1]. Composition of these materials ranges from 20 to 70% Cr [2]. The most common is the CuCr50 material containing 50% Cr.…”

“…Fusion can be artificial (for example, by means of electronic beams) [11] or natural (for example, resulting from flow of pre-breakdown current) [12,13]. The study [2] mentions self-organization processes during melting of surface layers. This self-organization is connected in [2] with the fact that adaptation of contact surface takes place, since melting promotes increasing wear resistance.…”

“…The study [2] mentions self-organization processes during melting of surface layers. This self-organization is connected in [2] with the fact that adaptation of contact surface takes place, since melting promotes increasing wear resistance. The microstructure of the Cu-Cr system material after such melting complies with the phase diagram includes the formation of fine-dispersed chromium particles is observed on the contact surface [2].…”

“…This self-organization is connected in [2] with the fact that adaptation of contact surface takes place, since melting promotes increasing wear resistance. The microstructure of the Cu-Cr system material after such melting complies with the phase diagram includes the formation of fine-dispersed chromium particles is observed on the contact surface [2]. The self-organization results in considerable decreasing of wear intensity [14]: for example, in the case of friction, this study will attempt to understand the self-organization mechanisms that take place during initial fusion of contacts made of the Cu-Cr system material.…”