Study of damage of high zirconia fused-cast refractories by measurement of Young's modulus

Young's modulus evolutions versus temperature have been studied for two high zirconia fused-cast refractories undergoing thermal solicitations up to 1700 °C. As well as the step of cooling from very high temperature of the manufacturing process, the first heating up can lead to the formation of...

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Published inMaterials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 521; pp. 221 - 223
Main Authors Sibil, A., Erauw, J.P., Cambier, F., R’Mili, M., Godin, N., Fantozzi, G.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Kidlington Elsevier B.V 15.09.2009
Elsevier
Subjects
Condensed matter: structure, mechanical and thermal properties
Engineering Sciences
Exact sciences and technology
Fatigue, brittleness, fracture, and cracks
IET
Materials
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
Refractories
Young's modulus
ZrO 2
ZrO 2
Young's modulus
IET
Refractories
Inorganic compounds
Heat resistant materials
Cooling
Transition element compounds
High temperature
Heat treatments
Allotropic transformation
Young modulus
Thermal expansion
Microcracking
Manufacturing processes
Zirconium oxide
Internal stresses
ZrO
Damage
Electrocast refractory
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Summary:Young's modulus evolutions versus temperature have been studied for two high zirconia fused-cast refractories undergoing thermal solicitations up to 1700 °C. As well as the step of cooling from very high temperature of the manufacturing process, the first heating up can lead to the formation of internal stresses that are released by microcracking. Young's modulus has been assessed by using the impulse excitation technique at room and high temperature. Damage and healing phenomena for different temperatures are compared and discussed taking into account the physico-chemical evolutions. The effect of the allotropic transformation of zirconia, through its associated change of volume, is in particular emphasized. Furthermore, the behaviour of the glassy phase, responsible for healing at high temperature and damage at lower temperature by thermal expansion mismatch, is discussed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2008.09.135