Improvement in fatigue resistance performance of corundum castables with addition of different size calcium hexaluminate particles

Fabrication of CaAl12O19–CaTiO3 composites and their potential usage for TiAl alloy smelting

“…Moreover, they have high refractoriness and corrosion resistance and thermal shock stability. [21][22][23][24][25][26][27][28][29] Therefore, in this study, CaAl 12 O 19 -CaTiO 3 composite materials were fabricated using a solid sintering method. The effects of the calcium source and TiO 2 content on the phase composition, properties, and microstructure of the CA 6 -CT materials were investigated in detail.…”

“…In the CaO–Al 2 O 3 –TiO 2 (CA 6 –CT) system, CaAl 12 O 19 and CaTiO 3 have the highest stability. Moreover, they have high refractoriness and corrosion resistance and thermal shock stability 21–29 . Therefore, in this study, CaAl 12 O 19 –CaTiO 3 composite materials were fabricated using a solid sintering method.…”

Preparation of Al2O3@CaCO3 aggregates and its effects on the thermal shock resistance of Al2O3‐MgO castables

“…However, according to the report of Liu et al 19 there are three crack propagation paths in castables: within the aggregate (trans‐granular crack), between the interface of aggregate and matrix (interface crack) and within the matrix (matrix crack). In addition, the majority of the crack in castables is aggregate‐matrix interface crack, and then is the matrix crack.…”

“…However, in‐situ formed CA 6 particles in these researches were randomly distributed in the matrix and the matrix‐aggregates interface is neglected. Meanwhile, it is found that the addition of water‐soluble calcium chloride can also improve the TSR of castables, but the value of CCS and cold modulus of rupture (CMOR) of castables are reduced due to the formation of more pores, 23 In addition, substituting the plate‐shaped corundum aggregates (3‐1 mm) with CA 6 particles in same size can improve the fatigue resistance of castables, but the fatigue resistance of castables containing 5‐3 mm CA 6 particles is poor 19 . Most of these researches have focused on adding the powders to the matrix or substituting the corundum aggregates with other particles, and very little is known about the effects of the in situ formation of CA 6 interface layer between the aggregates and matrix on the improvement of matrix‐aggregates interfacial bond strength.…”