Effect of ZrO2 Addition on Densification and Mechanical Properties of MgAl2O4–CaAl4O7–CaAl12O19 Composite

• DOI: 10.1111/jace.13955
• Publication Date: 2015-10-06T05:56:45Z
• Authors: Lei Xu; Min Chen; Liang‐yu Jin; Xue‐liang Yin; Nan Wang; Lei Liu
• Keywords: Equiaxed crystals

Although the platelet structure of calcium hexaluminate (CaAl 12 O 19 , or CA 6 ) grains can strengthen and toughen Al 2 3 –MgO–CaO system materials designed in high‐alumina region, it also results poor densification subsequent accelerated slag penetration for refractory application. Considering this aspect, MgAl 4 –CaAl 7 composite was fabricated by solid‐state reaction sintering work, effect ZrO addition on mechanical properties investigated. The showed that presented a more equiaxed morphology contributing to form highly dense microstructures after heating at 1600°C without evident grain coarsening. compressive strength flexural were greatly enhanced mainly due significant decrease porosity pore sizes. Besides, increased content plays an active role toughening attributed microstructure strong bonding with higher strength, as well considerable t ‐ZrO transformability.