A surface layer including a base material made of a conductor and dispersed particles dispersed in the base material is formed on a surface of a fixed contact, and the dispersed particles each include a base particle that is metal oxide and a coating layer formed on an outer surface of the base particle.

A circuit breaker comprises a contact and a line terminal configured that are bound in an assembly using a silver nanoparticles (NpAg) material that is synthesized by reducing a precursor salt in presence of a reducing agent. The contact comprises a silver alloy material having a first surface. The line terminal comprises a non-ferrous material having a second surface such that a plurality of drops of the silver nanoparticles (NpAg) material synthesized using a green chemistry process are applied in an interface between the first surface of the contact and the second surface of the line terminal by performing a resistance projection welding to bind the two components.

A surface layer including a base material made of a conductor and dispersed particles dispersed in the base material is formed on a surface of a fixed contact, and the dispersed particles each include a base particle that is metal oxide and a coating layer formed on an outer surface of the base particle.