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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2006

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Segregation of atoms of the eutectic alloys Fe-Mn-C-B at friction wear

Pashechko M. I., Lenik K. C.

Journal of Achievements in Materials and Manufacturing Engineering

2006

Vol. 18, nr 1-2

467--470

Purpose: Wear resistance of eutectic alloys based on the Fe-Mn-C-B-Si-Ni-Al-Sc system was studied. Design/methodology/approach: The surface alloys were obtained by plasma surfacing of steel disks with previously prepared powder alloys. Atomic segregation in the eutectic coatings due to wear was studied by Auger-spectroscopy. Findings: An increased content of C, B, Si at a friction surface was revealed. Oxygen diffusion from the atmosphere into the coating was not detected. Research limitations/implications: Probably, that is due to the B and Si atoms segregation upon friction, and formation of B2O3 or system B2O3 - SiO2 is possible in the surface layer. Under some friction conditions they become more soft or liquid. The latter lowers the friction coefficient to values similar to these in liquids. Originality/value: The obtained results allowed to reveal a new effect in tribology of the Fe-Mn-C-B-Si-based dispersionally reinforced composite eutectic alloys: intensive diffuse processes occurring upon wear, leading to the C, B and Si contents increase in the friction surface.