The Effect of Grain Refinement on the Oxidation Performance of MCrAlY Alloys
Author | : Cory Kaplin |
Publisher | : |
Total Pages | : |
Release | : 2014 |
ISBN-10 | : OCLC:911144896 |
ISBN-13 | : |
Rating | : 4/5 (96 Downloads) |
Book excerpt: "MCrAlY's are a specific class of nickel-based superalloy primarily used as a thermal barrier coating (TBC) bond coat or for oxidation resistance. The focus of this thesis is to study the improvement of high temperature oxidation and corrosion performance of MCrAlY and related alloys through nanostructuring, from understanding the oxidation mechanism of grain refined materials to evaluation of their performance in a simulated service environment. Grain refinement of the metal substrate was shown to favour the formation of a single oxide layer of [alpha]-alumina that can prevent the formation of fast growing spinel oxides. Consequently lower overall oxidation rates are obtained, offering the possibility of longer service life for components and coatings." --