posted on 2018-10-26, 15:50authored byIrene Di Martino
Market-driven requirements for better performance of gas-turbine engines are the main drive
towards the development of more advanced Ni-based superalloy/coating systems. The
durability of such coated components is a crucial issue faced by the power generation and the
aircraft industries, because coating life mainly controls the refurbishment and replacement of
many engine parts, such as blades. Coated systems undergo a number of microstructural
changes as a result of thermal exposure, which need to be understood for the creation of
accurate microstructure-based life-prediction models.
This work was mainly concerned with the evolution of the microstructure in both the parent
material and the coating as a function of temperature and time in a number of single-crystal
Ni-based superalloys, coated with an MCrAlY coating. The microstructural changes occurring
at various time/temperature conditions were studied using thermodynamic equilibrium
calculations, scanning electron microscopy and energy dispersive X-ray analysis. [Continues.]
History
School
Aeronautical, Automotive, Chemical and Materials Engineering
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
Publication date
2004
Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.