Liu Aihui

Study of Interfacial Reaction between TiAl Alloys and Four Ceramic Molds

Abstract With the aid of SEM and DTA, the microstructures of metal side of the interface between Ti48Al2Cr2Nb alloy and Y 2 O 3 , ZrO 2 (Y 2 O 3 stabilized), ZrO 2 (MgO stabilized), and Zircon sand were investigated, respectively. The initial reaction temperatures were measured for Ti48Al2Cr2Nb alloy and Y 2 O 3 , ZrO 2 (Y 2 O 3 stabilized), ZrO 2 (MgO stabilized) and Zircon sand, respectively. The results show that the microstructure is the coarsest with rosettes-like shape after Ti48Al2Cr2Nb alloy reacts with Zircon sand, and even the smallest with granular-like shape after Ti48Al2Cr2Nb alloy reacts with Y 2 O 3 . The order of the initial reaction temperatures between Ti48Al2Cr2Nb alloy and four oxide ceramic materials is non-reaction at 1500, 1400, 1380, and 820 °C, respectively.