On the effect of sintering temperature on the fracture energy of an Alumina-Mullite-Zirconia castable at 600 °C. Issue 7 (July 2021)

• Record Type: Journal Article
• Authors: Vargas, R.; Pinelli, X.; Smaniotto, B.; Hild, F.; Canto, R.B.
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 7(2021)
• Page Start: 4406
• Page End: 4418
• Publication Date: 2021-07
• Subjects: High-temperature -- Digital Image correlation (DIC) -- Wedge Splitting Test (WST) -- Crack propagation -- Fracture energy; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2021.01.023
• Languages: English
• ISSNs: 0955-2219

Abstract

Highlights: Fracture energy of an Alumina-Mullite-Zirconia castable was assessed at 600 ° C. Sintering temperature significantly influenced the measured fracture energy. Tomographies were compared to DIC results to analyze bulk post-mortem cracks. Heat-haze effects were quantified in uncertainty analyses. Simple simulations provided proper extrapolation from NOD to CMOD. Abstract: Refractory castables are utilized in hazardous environments and thus their reliability should be accurately evaluated to avoid incidents. This work aims to measure the fracture energy of a high-alumina refractory with mullite-zirconia aggregates at 600 ° C. Wedge Splitting Tests were performed on 5 samples with different sintering temperatures. Images were acquired and analyzed via Digital Image Correlation (DIC). Notch Opening Displacements were used to evaluate the fracture energy at room and high temperatures. For the studied material, a 50 ° C increase in the sintering temperature increased about 30% the fracture energy of the material, which is also higher at 600 ° C when compared to room temperature measurements.