04.2021.134.144

Effects of Nano Coating on the Mechanical Properties of Turbine Blades: A Review

Author(s):

Adnan A. Ugla, Mushtaq I. Hasan, Zainalabden A. Ibrahim, Dhuha J. Kamil and Hassan J. Khudair

Affiliation(s):

Mechanical Engineering Department, College of Engineering, Advanced Nano-Technology Research Group, University of Thi-Qar, An-Nasiriyah, Iraq– Postcode: 64001

Corresponding Author Email: zz.zean@yahoo.com;

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

A steam turbine’s components work under aggressive conditions where operating temperatures range from environmental to near-melting point, contributing to different component degradation. Some parts which lose their dimensional tolerance during use need repair and refurbishment when replacement is avoidable at a high cost. Due to oscillatory vibration action, the compressor blades’ dovetail roots are subject to fatigue. The compressor case comes into contact with rotating blades, causing blade damage due to a misalignment shaft, case ovality, or inadequate clearance. Using various contact surfaces undergoing spinning and joint movement takes place during the operation of the turbine. Rotating and stationary parts in the hot sector need a higher working temperature thermal insulation, enhancing the turbine’s thermodynamic performance. The application of various coatings that protect the components from failure meets this broad range of functional motor requirements. In terms of not seeking a more in-depth perspective into the field of steam turbine coating, the present review describes the specifics of these coatings at a single stage, application and characterization approaches, and indicative potential directions that are useful to an industrial engineer.