Author:D Yuan, TM Shao, E Fleury, D Se, DR Chen

Institute: State Key Laboratory of Tribology, Building 9003, Tsinghua University, Beijing 100084, PR China; Center for Non-Crystalline Materials, Yonsei University, Seoul, South Korea

The microstructure and tribological properties of plasma-sprayed aluminum-copper-iron quasicrystalline coatings (Al-Cu-Fe) after laser post-processing are currently current research areas in the field of surface processing of materials.

The following methods were used during the study: microscopy, X-ray diffraction analysis, microhardness measurements, friction and wear tests. The optimal laser power and irradiation modes have been established to obtain the best results in changing the microstructure and properties of the coating surface.

The study showed that laser post-processing leads to the formation of a strengthened structure of the coating surface, which is confirmed by an increase in the microhardness of the coating. In addition, a redistribution of elements in the coating is observed, which leads to a change in its composition and structure.

Tribological tests have shown that laser post-processing improves the tribological properties of the coating. There is a decrease in the coefficient of friction and the wear resistance of the coating increases. This is due to the strengthening and formation of new phases in the surface layer of the coating.

The results of the study show that laser post-processing of plasma-deposited quasicrystalline Al-Cu-Fe coatings is an effective method for improving their mechanical and tribological properties. These results can be used to develop new methods for processing and strengthening the surface of various materials used in various industries.