钛铝基合金与4种陶瓷界面反应的研究(英文)

Study of Interfacial Reaction between TiAl Alloys and Four Ceramic Molds

借助SEM和差热分析(DTA),研究了Ti48Al2Cr2Nb合金与Y2O3、ZrO2(Y2O3稳定)、ZrO2(MgO稳定)和锆英砂4种陶瓷耐火材料界面反应后金属侧的显微组织,并测定了Ti48Al2Cr2Nb合金与Y2O3、ZrO2(Y2O3稳定)、ZrO2(MgO稳定)和锆英砂4种陶瓷耐火材料的初始反应温度。结果表明,Ti48Al2Cr2Nb合金与锆英砂反应后的显微组织最粗大,为菊花状,而与Y2O3反应产物最细小均匀,为颗粒状;4种陶瓷材料对Ti48Al2Cr2Nb合金的初始反应温度依次为:1500,1400,1380和820℃。

With the aid of SEM and DTA, the microstructures at metal side of interface between Ti48Al2Cr2Nb alloy and Y2O3, ZrO2 （Y2O3 stabilized）, ZrO2 （MgO stabilized）, and Zircon sand were investigated, respectively. The initial reaction temperatures were measured for Ti48Al2Cr2Nb alloy and Y2O3, ZrO2 （Y203 stabilized）, ZrO2 （MgO stabilized）, 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 Y2O3. The order of the initial reaction temperatures between Ti48Al2Cr2Nb alloy and four oxide ceramic materials is non-reaction at 1500, 1400, 1380, and 820 ℃, respectively.