TRIBOLOGICAL AND QUICK THERMAL EVALUATION OF PROTECTIVE COATINGS FOR AEROSPACE AND METALLURGY

Abstract

Hot parts of turbo engines as well as those working in extreme conditions in the metallurgical industry are subject to complex loads, leading to wear factors that sometimes work together: temperature, thermal shock, erosion, corrosion, sliding friction, etc. The paper presents the types of protective structures developed, techniques used, methods of testing, investigation and results. Protective materials used are from the class of ceramics such as M/MeCrAlY/ ZrO2 ٠ Y2O3 (CaO, MgO, CeO), Me/NiCrAlY/Y2O3-Yb2O3-GdO3-Nd2O3-ZrO2/ZrB2 and other variants, as well as the type of complex alloys associated with Cu support. The techniques used for creating protection layers are EB-PVD coating or WIG welding. By tribological or extreme thermal testing on a facility design and made within INCAS, it was verified experimentally the basic properties of the protected structures. Stand tests made on real components, successfully validate the materials and technology solutions we designed.

Keywords

• tribology
• coating
• eb-pvd
• high temperature
• multiplex structure