| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a coating which makes a silicon-comprising material to be used at temperature beyond the melting point of silicon. <P>SOLUTION: The article 10 comprises a substrate 12 formed of a silicon-comprising material, and further comprises an environmental barrier layer 16, e.g., an alkaline earth metal aluminosilicate, and a top coat 18 comprising zirconia or hafnia stabilized with up to about 10 mol% of an oxide of a metal selected from the group consisting of magnesium, calcium, scandium, yttrium, and lanthanide metals, and mixtures thereof. The article 10 further comprise a transition layer 20 between the environmental barrier layer 16 and the top coat 18, the transition layer 20 comprising zirconia or hafnia stabilized with up to about 10 mole% of an oxide of a metal selected from the group consisting of magnesium, calcium, scandium, yttrium, and lanthanide metals; and a low CTE oxide selected from the group consisting of niobia and tantala; and mixtures thereof. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
