Boron induced abnormal grain growth in alumina

  • In this work, hot-pressing of alumina in contact with hexagonal boron nitride or doped with boron carbide was conducted at 1500 °C for 30 min. After hot-pressing, abnormal grain growth induced by boron diffusion from these substances into alumina was detected, as clearly demonstrated with SEM, EDS, EBSD, and Raman spectroscopy. Grain boundary complexion transformations, solute drag, or another mechanism relating to interface-controlled grain boundary mobility are presumed to be the fundamental mechanism responsible for abnormal grain growth observed in this work.

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Author:Christian BechtelerORCiD, Hannes Kühl, Richard I. Todd
DOI:https://doi.org/10.1016/j.oceram.2024.100636
ISSN:2666-5395
Parent Title (English):Open Ceramics
Publisher:Elsevier BV
Document Type:Article
Language:English
Reviewed:Begutachtet/Reviewed
Release Date:2024/11/07
Tag:Alumina; Boron; Abnormal grain growth; Microstructure Diffusion
Volume:19
Article Number:100636
Pagenumber:7
institutes:Fakultät Werkstofftechnik
Research Themes:Materialien & Produktionstechnik
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International
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