High-Temperature Protective Coatings Produced by EB-PVD

Abstract

The paper presents some new technological sequences of electron beam evaporation and deposition of high-temperature metal-ceramic coatings.The main attention is given to two-layer Me-Cr-Al-Y/ZrO2-Y2O3 coatings with transition layers of the total thickness of up to 0.2 mm. Chemical composition and structures of the main layers (metal, ceramics) and substrate/metal and metal/ceramics transition layers, as well as the respective physico-mechanical properties are considered.A method of deposition of these coatings in one technological cycle of evaporation and condensation with application of evaporation composite ingot is proposed. Examples of coating "design" and respective equipment for practical application in gas turbine construction are given.

Advanced iron boride coatings to enhance corrosion resistance of steels in geothermal power generation

“…Surface engineering, particularly, protective coatings on steels, can be a straightforward route to improve performance of materials and products involving in the geothermal processing. Different coating materials and technologies, including electrolytic-or electroless-based processes, cold and thermal spray coating processes, dip and spin coating and many other chemical and mechanical coating processes, may be considered [33][34][35][36][37][38][39][40]. However, many of them cannot be used either due to their lower performance in high-temperature corrosive-erosive conditions or due to low probability to apply them for protection of long tubing and other large size and complex shape production components.…”