X-ray computed tomography study of microstructure weakening by high-temperature hydrogen attack on refractories

  • X-ray computed tomography (XRT) is a three-dimensional (3D), non-destructive, and reproducible investigation method capable of visualizing and examining internal and external structures of components independent of the material and geometry. In this work, XRT with its unique abilities complements conventionally utilized examination methods for the investigation of microstructure weakening induced by hydrogen corrosion and furthermore provides a new approach to corrosion research. The motivation for this is the current inevitable transformation to hydrogen-based steel production. Refractories of the system Al2O3-SiO2 are significant as lining materials. Two exemplary material types A and B, which differ mainly in their Al2O3:SiO2 ratio, are examined here using XRT. Identical samples of the two materials are measured, analyzed, and then compared before and after hydrogen attack. In this context, hydrogen corrosion-induced porosity and its spatial distribution and morphology are investigated. The results show that sample B has an higher resistance to hydrogen-induced attack than sample A. Furthermore, the 3D-representation revealed a differential porosity increase within the microstructure.

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Author:Anita Razavi, Isabelle Henn, Peter Quirmbach, Almuth Sax
Parent Title (English):International Journal of Ceramic Engineering & Science
Document Type:Article
Date of completion:2024/05/28
Date of publication:2024/06/03
Publishing institution:Universität Koblenz, Universitätsbibliothek
Release Date:2024/06/03
First page:1
Last page:8
Institutes:Fachbereich 3 / Institut für Integrierte Naturwissenschaften / Institut für Integrierte Naturwissenschaften, Abt. Chemie
Licence (German):License LogoEs gilt das deutsche Urheberrecht: § 53 UrhG