| US 7,560,138 B2 | ||
| Oxidation resistant coatings for ultra high temperature transition metals and transition metal alloys | ||
| John H. Perepezko, Madison, Wis. (US); Joon S. Park, Madison, Wis. (US); and Ridwan N. Sakidja, Madison, Wis. (US) | ||
| Assigned to Wisconsin Alumni Research Foundation, Madison, Wis. (US) | ||
| Filed on Dec. 12, 2005, as Appl. No. 11/299,427. | ||
| Application 11/299427 is a division of application No. 10/428336, filed on May 02, 2003, granted, now 7,005,191. | ||
| Claims priority of provisional application 60/467076, filed on May 01, 2003. | ||
| Prior Publication US 2006/0228475 A1, Oct. 12, 2006 | ||
| Int. Cl. C23C 16/00 (2006.01); B05D 3/02 (2006.01) | ||
| U.S. Cl. 427—248.1 [427/372.2; 427/255.17; 427/255.18; 427/252; 148/279; 148/281] | 20 Claims |
| 1. A method for producing an oxidation resistant multi-layered structure, the method comprising:
(a) exposing a Mo—Si—B alloy substrate or a substrate having a Mo—Si—B alloy surface character to a vapor comprising silicon
and annealing the substrate to form a layer of MoSi2 on the substrate; and
(b) annealing the MoSi2 layer to produce an outer borosilicate layer, an intermediate layer comprising molybdenum disilicides, molybdenum silicides,
or combinations thereof, and an inner borosilicide layer, wherein the inner borosilicide layer is integrated with the substrate.
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