| 摘要 |
<p>A hard noble-metal alloy member which is constituted of a gold alloy having a gold content of 37.50 to 98.45 wt.% and containing a hardening additive consisting of either gadolinium alone or a mixture thereof with at least one member selected from the group consisting of rare earth elements excluding gadolinium, alkaline earth elements, silicon, aluminum, and boron, the total amount of all the hardening elements being 50 to 15,000 ppm, excluding 15,000 ppm.</p> |
