Metal injection molding (MIM), which is suitable for mass production of complex shapes, is a promising method for manufacturing turbine blades using TiAl alloys, which are lightweight and heat resistant but difficult to cast and forge. Therefore, it is important to design alloy composition that have excellent sintering properties and achieve high sintering density.

In this study, we focused on Ni, which has the effect of lowering the melting point of Ti, and investigated the sintering behavior of TiAl alloy powders containing various amounts of Ni powder by differential thermal analysis and microstructural observation to clarify the effect of Ni on the sintering properties.