Protective layer for a refractory product
AssigneeSaint-Gobain Centre De Recherches Et D'Etudes Europeen
InventorsIsabelle Cabodi, Frédéric Hoffmann, Pierrick Fabien Vespa
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Abstract
A process for treating a fused refractory product including more than 10% by mass of ZrO2, or “base product.” The process includes heating at least a portion of the surface of the product, so as to melt ZrO2 crystals in a superficial region extending to a depth of less than 2000 μm. The process includes cooling the molten superficial region obtained in the preceding step so as to obtain a protective layer.
Claims13
A process for treating a fused refractory product including more than 10% by mass of ZrO2, or “base product”, said process including the following steps:
- a) heating at least a portion of the surface of said product, or “surface to be treated”, so as to melt ZrO2 crystals in a superficial region extending to a depth of less than 2000 μm, or “remelting”;
- and
- b) cooling the molten superficial region obtained in the preceding step so as to obtain a protective layer;
- c) optionally at least partially recrystallizing the zirconia present in the amorphous phase of the protective layer;
- in which process, in step a), the surface to be treated is irradiated using an incident laser or plasma radiation beam, the power per unit area of the incident beam being greater than 5000 W/mm2.
Dependencies are inferred from the claim text.