Overdoping effect with Zr and Hf on the oxidation behaviour of FeCrAl-Hf by means of Atom Probe Tomography

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F24%3APU155034" target="_blank" >RIV/00216305:26220/24:PU155034 - isvavai.cz</a>

Result on the web

<a href="https://www.eeict.cz/eeict_download/archiv/sborniky/EEICT_2024_sbornik_2.pdf" target="_blank" >https://www.eeict.cz/eeict_download/archiv/sborniky/EEICT_2024_sbornik_2.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.13164/eeict.2024.176" target="_blank" >10.13164/eeict.2024.176</a>

Result language

angličtina

Original language name

Overdoping effect with Zr and Hf on the oxidation behaviour of FeCrAl-Hf by means of Atom Probe Tomography

Original language description

The study investigated the oxidation behaviour and grain boundary diffusion of minor/major elements of FeCrAl alloys, doped with over-critical concentrations of reactive elements (REs) Zr and Hf. While the formation of α − Al2O3 scale on these alloys is conventionally attributed to inward oxygen transport along grain boundaries, this research proposes that metal ion outward diffusion also contributes to the development of oxide scales and their microstructural characteristics. Samples were analyzed after thermal exposure at 1100 °C using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atom probe tomography (APT). Results revealed increased oxide growth, deeper internal oxidation, and RE-oxide formation near and at oxide grain boundaries due to enhanced inward and outward diffusion resulting from overdoping. The impact of overdoping varied with RE type and concentration, influenced by solubility, ionic size, and electronic structure of alumina. Notably, Zr-doped samples maintained alumina adhesion to the alloy after thermal exposure, whereas severe spallation occurred in Hf-doped samples

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

<a href="/en/project/LM2023051" target="_blank" >LM2023051: Research infrastructure CzechNanoLab</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings II of the 30th Conference STUDENT EEICT 2024: Selected papers

ISBN

978-80-214-6230-4

ISSN

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e-ISSN

—

Number of pages

6

Pages from-to

176-181

Publisher name

Brno University of Technology, Faculty of Electronic Engineering and Communication

Place of publication

Brno

Event location

Brno

Event date

Apr 23, 2024

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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