High Temperature Materials 21 Project(Phase 2)

In Phase 1 (F.Y.1999-2005) , single crystal (SC) superalloys with temperature capabilities of 1100°C, Si₃N₄ of 1500°C, and Pt Group Metals-base refractory superalloys of 1750°C have been developed. Turbine tests in a 1300°C land base gas turbine and a 1650°C aeroengine (core -engine) on the ground has been conducted with SC superalloys. (Temperature capability =temperature for 1000h creep rupture life at 137MPa)

Phase 2

Materials Developments

1. Ni-base single crystal superalloys with temperature capabilities as high as 1150 °C (1060 °C at present) and coatings.
2. Next generation Ni-Co base turbine disc alloys of temperature capabilities as high as 750°C (700°C at present).
3. Refractory superalloys with temperature capabilities beyond 1200°C up to 1800 °C.
4. Materials design and analysis techniques.
5. Virtual gas turbine/aeroengine for materials evaluation

Applications for CO₂ emission mitigation

1. 1700°C Gas turbines for combined cycle power plants.
   (One 1700°C conbined cycle plant can reduce CO2 by 0.4% of total emission in Japan when substituted for coal firing thermal plant of a same capacity:e.g.,1250MW)
2. Small but efficient gas turbines for cogenerations.
3. Small civil engines for regional jets, eco-engine.
4. Overseas civil aeroengine.