Fusion-casting and crystallization of high temperature materials

Acoustic characterization and microstructure of high zirconia electrofused refractories

“…3,4 The study of the variations with temperature of elastic properties and the characterization of damage by acoustic techniques is thus of a great interest to better understand the evolution of microstructure during this step. In this paper, Young's modulus measurements by an ultrasonic pulse echo technique and an acoustic emission technique have been performed during heating cycles up to 1500 • C. The main goal is to link mechanical behaviour and microstructure evolution during heat treatments at intermediate temperatures in order to improve the knowledge of mechanisms of stress development and microcracking in the material.…”

Neutron diffraction measurements of residual stress distribution in large zirconia based refractory bricks produced by electro-fusion and casting

“…Refractory materials containing high amounts of ZrO 2 are widely used as flux blocks for glass-making furnaces owing to the resistance of ZrO 2 to the corrosive effects of molten glass [1,2]. The size of these blocks is several hundreds of millimetres.…”

“…Therefore the tetragonal-monoclinic SPT alone creates large amounts of strain in the material and induces cracking, which finally leads to breaking the pure bulk zirconia to pieces. In the case of refractory blocks containing a large volume fraction of zirconia, an amorphous matrix phase is used between the ZrO 2 crystals and acts as a medium for partial stress relief [1].…”