| 摘要 |
PROBLEM TO BE SOLVED: To provide a crystalline diplophase hydrogen-permeation alloy which has hydrogen permeability and hydrogen embrittlement resistance and is usable at≥473 K. SOLUTION: The crystalline diplophase hydrogen permeation alloy of a diplophase Co-Ti-Nb system consists of the diplophase and the diplophase has a structure surrounding the TiNb phase that the eutectic (CoTi+TiNb) of a CoTi phase solutionizing Nb and a TiNb phase solutionizing Co generates as a primary crystal. The alloy has an alloy composition within the region surrounded by Co<SB>20</SB>Ti<SB>30</SB>Nb<SB>50</SB>, Co<SB>20</SB>Ti<SB>10</SB>Nb<SB>70</SB>, Co<SB>10</SB>Ti<SB>10</SB>Nb<SB>80</SB>, and Co<SB>10</SB>Ti<SB>30</SB>Nb<SB>60</SB>(where alloy compositions are all by atom%) and on the line connecting Co<SB>20</SB>Ti<SB>30</SB>Nb<SB>50</SB>to Co<SB>20</SB>Ti<SB>10</SB>Nb<SB>70</SB>(where alloy compositions are all by atom%) on a Co-Ti-Nb ternary state diagram. COPYRIGHT: (C)2008,JPO&INPIT
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