Properties of Refractories after Exposure to High Pressure Gases III
Effect of percent saturation
The dimensional stability, density, porosity and flexural strength of several cement and phosphatebonded refractories were determined before and after exposure to steam and CO containing atmospheres at ∼0, 13.5, 30.5, 32.5, 85 and 100 pct saturation. The flexural strength and compounds present in a neat, high alumina cement were also determined as a function of the percent saturation of pure steam and steam/CO atmospheres. Chemical reactions occurring in the refractories and the neat cement were determined by XRD, DTA/TGA and SEM and correlated with the above properties. The flexural strength of the cementbonded castables and the hydrated neat cement increased significantly with increasing saturation due to the formation of new compounds, primarily boehmite. A minimum saturation of ∼70 pct was needed to realize the full increase in flexural strength. Phosphatebonded refractories became weaker after exposure to saturated atmospheres.
A. Fakhr and D. E. Day, "Properties of Refractories after Exposure to High Pressure Gases III," Journal of Materials for Energy Systems, Springer Verlag, Dec 1980.
The definitive version is available at http://dx.doi.org/10.1007/BF02833433
Materials Science and Engineering
Keywords and Phrases
Characterization and Evaluation of Materials
Article - Journal
© 1980 Springer Verlag, All rights reserved.