| 摘要 |
<p>A heat-resistant material for a niobium base alloy which comprises a substrate of a niobium base alloy, a first alloy coating film comprising Re and at least two other metal elements formed on the surface of the substrate and, formed on the surface of the first alloy coating film, a second alloy coating film comprising one element of Al and Si and at least one metal element except these elements. The above combination of coating films exhibits excellement performance in the interception of oxygen and is less susceptible to deterioration owing to diffusion of an element. Suitable compositions of the first alloy coating film and the second alloy coating film are disclosed for each case wherein the second alloy coating film comprises Al or Si, and preferred compositions of alloy coating films for some compositions of the niobium base alloy of the substrate are also disclosed.</p> |
