Synthesis of CA6/AlON Composites with Enhanced Slag Resistance

Abstract

Aiming to improve the slag resistance of calcium hexaaluminate (CA6), different amounts of AlON have been introduced into CA6 using two approaches, i.e. one-step and two-step methods. The results show that both the two phases of CA6 and AlON are uniformly distributed when sintered at 1650 °C for 2 h in flowing nitrogen using two-step method. The optimized amount of AlON addition is determined to be 10 wt%. In addition, the reaction test method is performed and CA6/AlON composite exhibits much better slag penetration and corrosion resistance compared with pure CA6. The effect of AlON is also discussed.