Abstract
Four formulations of magnesia-graphite-aluminum metal (antioxidant) bricks were prepared from the same raw materials, using the standard commercial practices. Chemical analysis and determination of room-temperature modulus of rupture and Young's modulus, as well as a complete microstructural characterization of the as-received materials, were performed. For high-temperature modulus-of-rupture and Young's modulus data, test samples of the four brick compositions were heated to 1000°, 1200°, and 1450 °C in flowing argon (< 1000 ppm oxygen at 1000 °C) and then loaded mechanically in flexure. Modulus-of-elasticity values ranged from 3.7 to 16.2 GPa and reflected strong effects of aluminum-metal concentration and treatment temperature. Young's modulus evolution with temperature was determined by the evolution of the micro-structure in the bulk of the specimens. Modulus-of-rupture values ranged from 6 to 21 MPa, and their evolution with temperature was determined by the evolution of the micro-structure in the bulk of the specimens at the lower testing temperatures (T≤1200 °C) and by phase assemblages in the surface regions of the specimens - essentially by the presence of the dense MgO zone - at 1450 °C.
Recommended Citation
C. Baudín et al., "Influence of Chemical Reactions in Magnesia-graphite Refractories: I, Effects on Texture and High-temperature Mechanical Properties," Journal of the American Ceramic Society, vol. 82, no. 12, pp. 3529 - 3538, Wiley, Jan 1999.
The definitive version is available at https://doi.org/10.1111/j.1151-2916.1999.tb02276.x
Department(s)
Materials Science and Engineering
Publication Status
Full Access
International Standard Serial Number (ISSN)
0002-7820
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Wiley, All rights reserved.
Publication Date
01 Jan 1999
