Abstract
Friction transfer film is one of the influencing factors in the evolution of the subsurface microstructure of frictional contact materials. An iron-poor friction transfer film of aluminum-based composites with silicon carbide and pozzolanic silicate particles as the reinforcing phase was investigated utilizing scanning electron microscope, focused ion beams, transmission electron microscopy and energy dispersive X-ray analysis. The results showed that the friction transfer film contained ultra-fine aluminum, nano-aluminum, broken silicon carbide and silicate particles, as well as in-situ generated andradite and gismondine, which self-assemble into a nano-network structure to support the formation of the friction transfer film. Thermodynamic calculations and high-resolution transmission electron microscopy clarified the formation mechanism of andradite and gismondine.
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