Resources / Publications
Eric Parmentier (1), Erica Marucco Fuentes (2), Morgane Millot (1), Xavier Raick (1), Arc Thiry (2)
Journal of Materials Research and Technology, 8, Issue 1, November 2018: 1319-1327. DOI: 10.1016/j.jmrt.2018.10.003
High-temperature diffusion, High alumina-silicate refractory, Mechanical properties, X-ray microtomography, Image analysis
Diffusion tests were performed with solid diffusants of Iron oxides in contact with porous silico-aluminous refractory castables in high-temperature conditions. A non-destructive X-ray computer microtomography technique with digital 3D reconstruction (3DμCT) was used for spatial monitoring the diffusion into the media. A particle tracking (PT) method was applied to evaluate diffusion through porous materials and to quantify its diffusive properties based on 3D images over time. The influence of temperature was examined in the range from 1100 °C to 1300 °C. Each sample was heat treated for 100 h in the investigated temperature. The normalized concentration of diffusants as a function of the penetration was obtained by 3DμCT images and compared with the concentration profile determined by elementary microanalysis with energy dispersive spectroscopy and surface chemical mapping (MAP/EDS). Thus, the diffusivity of the porous media was quantified from the experimental data. It was observed a variation less than 3.52% between the MAP/EDS and 3DμCT, i.e., between the destructive and non-destructive methods, suggesting that the 3DμCT method may be extended to other media and diffusants.
Dragonfly was used for the digital processing and analysis of 3DCT images.
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