| http://www.w3.org/ns/prov#value | - The results are shown in FIG. 14. [0071] Among various alloys, change of the crystal grain size was scarcely observed in Nd-added Ag-1%Nd even when the retention time was increased, whereas the crystal grain size was increased remarkably as the retention time was increased in the Ag alloy in which the element other than Nd was added.
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