NIOBIUM SILICIDE-BASED COMPOSITE MATERIAL, HIGH-TEMPERATURE COMPONENT USING SAME, AND HIGH-TEMPERATURE HEAT ENGINE

摘要

To provide a Nb-silicide based composite achieving both mechanical characteristics and toughness at high levels in an ultrahigh temperature region (1200°C or more) as well as a high-temperature component and a high-temperature heat engine which employ the same. The Nb-silicide based composite according to the present invention includes 13 to 23 at% of Si, 2.0 to 10 at% of Cr, 5.0 to 23 at% of Ti, 0.0 to 6.0 at% of Al, 0.10 to 8.0 at% of Zr, 1.0 to 8.0 at% of Hf, 0.0 to 2.0 at% of W, 0.10 to 6.0 at% of Sn, 3.1 to 8.0 at% of Mo, 0.20 to 5.0 at% of B, and the balance being Nb and inevitable impurities.