| 摘要 |
PROBLEM TO BE SOLVED: To provide a niobium silicide based niobium based composite material which has improved creep properties at ultrahigh temperature in addition to high temperature strength and cold toughness. SOLUTION: The niobium based composite material comprises, by atom, 5 to 30% Mo, 5 to 30% W, 5 to 18.7% Si, 2 to 20% C and 2 to 20% Hf, and the balance Nb. Alternatively, the niobium based composite material comprises 5 to 30% Mo, 18.7 to 26% Si, 2 to 20% C, 2 to 20% Hf, and the balance Nb. COPYRIGHT: (C)2004,JPO&NCIPI
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