Effect of boron on the friction of porous nickel at high velocities and temperatures

1. At high sliding friction velocities (55 m/sec) and ambient temperatures (400°C), sintered nickel can develop an oxide surface film. However, due to the high ductility of nickel, the film disintegrates with the development of seizing and deposition processes. 2. The ductility of nickel diminishes if it is alloyed with boron, which considerably retards the disintegration of the surface film, prevents seizing under small loads, and secures a low friction coefficient.