Claims
- 1. An article comprising a metal substrate and a thermally sprayed coating having a refractory oxide layer which by x-ray phase analysis comprises ZrO.sub.2 substantially in the cubic and tetragonal phases, at least one oxide selected from the group consisting of CaO, Y.sub.2 O.sub.3, MgO, CeO.sub.2,HfO.sub.2 and a rare earth oxide, and at least one compound selected from the group consisting of SiO.sub.2 and ZrSiO.sub.4.
- 2. The article of claim 1 wherein said metal substrate is a hearth roll for the continuous annealing of steel and wherein said at least one oxide is selected from the group consisting of yttria and calcia.
- 3. The article of claim 2 wherein the ZrO.sub.2 is at least 60 percent in the cubic and tetragonal phases.
Parent Case Info
This application is a Division of prior U.S. application: Ser. No. 07/967,334, filing date Oct. 28, 1992, now U.S. Pat. No. 5,304,519.
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Divisions (1)
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Number |
Date |
Country |
Parent |
967334 |
Oct 1992 |
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