View in EDS

Engineered gradient structures in Al2O3-Ni composites: unlocking the potential of centrifugal slip casting for tailored microstructures and surface spinel formation.

Saved in:
Bibliographic Details
Title: Engineered gradient structures in Al2O3-Ni composites: unlocking the potential of centrifugal slip casting for tailored microstructures and surface spinel formation.
Authors: Zygmuntowicz, Justyna1 (AUTHOR) Justyna.zygmuntowicz@pw.edu.pl, Wachowski, Marcin2 (AUTHOR), Szymańska, Joanna3 (AUTHOR)
Source: Ceramics International. Sep2025:Part A, Vol. 51 Issue 21, p33301-33310. 10p.
Subjects: Slip casting, Centrifugal casting, Aluminum oxide, Functionally gradient materials, Rheology
Abstract: This study investigates the fabrication and characterization of Al 2 O 3 -Ni composites produced via centrifugal slip casting, focusing on the controlled formation of a surface NiAl 2 O 4 spinel phase. Two composite series were analyzed: Series I (45 vol% solid phase) and Series II (50 vol% solid phase), both containing 10 vol% Ni by volume. Microstructural analysis revealed a gradient distribution of Ni, with Series I exhibiting more pronounced segregation and Series II displaying a more homogeneous structure. Rheological studies confirmed shear-thinning behavior, with higher solid content improving slurry stability. Stereological analysis demonstrated finer and more uniformly distributed Ni particles in Series II, influencing mechanical properties. The results highlight the impact of solid phase content on particle dispersion and spinel layer formation, offering insights for optimizing functionally graded ceramic-metal composites. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:This study investigates the fabrication and characterization of Al 2 O 3 -Ni composites produced via centrifugal slip casting, focusing on the controlled formation of a surface NiAl 2 O 4 spinel phase. Two composite series were analyzed: Series I (45 vol% solid phase) and Series II (50 vol% solid phase), both containing 10 vol% Ni by volume. Microstructural analysis revealed a gradient distribution of Ni, with Series I exhibiting more pronounced segregation and Series II displaying a more homogeneous structure. Rheological studies confirmed shear-thinning behavior, with higher solid content improving slurry stability. Stereological analysis demonstrated finer and more uniformly distributed Ni particles in Series II, influencing mechanical properties. The results highlight the impact of solid phase content on particle dispersion and spinel layer formation, offering insights for optimizing functionally graded ceramic-metal composites. [ABSTRACT FROM AUTHOR]
ISSN:02728842
DOI:10.1016/j.ceramint.2025.05.063