Employing miniaturized test methods to determine high-temperature strength of carbon-bonded alumina

The Brazilian disc test (BDT) and the ball-on-three-ball (B3B) test, both adapted for utilizing miniaturized specimens, are used to characterize the strength of ceramic filter materials made from carbon-bonded alumina (Al2O3-C) at temperatures up to 1500 °C. Conventionally manufactured Al2O3-C and e...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the European Ceramic Society 2025-03, Vol.45 (3), p.117035, Article 117035
Main Authors: Firouzeh, Shahin Takht, Abendroth, Martin, Wetzig, Tony, Aneziris, Christos G., Kiefer, Bjoern
Format: Article
Language:English
Subjects:
Ball-on-three-ball test
Brazilian disc test
Ceramic filter materials
Weibull distribution
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Brazilian disc test (BDT) and the ball-on-three-ball (B3B) test, both adapted for utilizing miniaturized specimens, are used to characterize the strength of ceramic filter materials made from carbon-bonded alumina (Al2O3-C) at temperatures up to 1500 °C. Conventionally manufactured Al2O3-C and environmentally friendly coal tar pitch-free variations of filter materials are investigated. To determine the fracture stresses and the Weibull distribution of the material’s strength, finite element models and the maximum likelihood method are used. Scanning electron microscopy of fracture surfaces gives insight into the microstructure of tested samples. The material strength of the pitch-free Al2O3-C was found to be inferior to the conventional alternative. The volume-related Weibull stress distributions revealed that the uniaxial strength of the conventional filter materials exhibited an increasing trend as temperature increased, which was contrary to the biaxial strength.
ISSN:0955-2219
DOI:10.1016/j.jeurceramsoc.2024.117035