NOVÁK Pavel ICT in Prague

Development of Surface Treatment for Thermally and Mechanically Loaded Parts of Combustion Engines

Co-authors VYSTRČIL Jiří, CHOCHOLATÝ Ondřej, MICHALCOVÁ Alena, VOJTĚCH Dalibor

Several parts of combustion engines (such as piston rings or exhaust valves) are loaded by a combination of thermal cycling, adhesive-abrasive wear and corrosion by combustion gases. The materials selection for these conditions is quite complicated and in some cases the coatings (e.g. electrolytic chromium coatings or TiN layers prepared by PVD) are applied. In this work, the applicability of Ni-ceramics composite coatings and Fe-Al intermetallic layers was tested. Preparation technologies of these layers were developed for steel and cast iron substrates. Microstructure, mechanical and tribological properties and thermal stability of the layers were determined.

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