The market for gas turbine combined cycle (GTCC) power generation is expected to grow on
a long-term basis as the cleanest and most economic thermal power generating system that can
coexist with renewable energy. To further achieve further efficiency, it is essential to improve the
properties of turbine component materials and develop manufacturing technologies for building
the complicated structures required by advanced blade design. This report presents the
development of technologies including alloy design and casting, coating, welding repair, and
cooling-hole drilling processes, as material and manufacturing technologies for the
higher-temperature application of gas turbines.