Method for producing a ceramic layer on a surface formed from an Ni base alloy
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United States of America Patent
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Mar 20, 2018
Grant Date -
Feb 26, 2015
app pub date -
Jan 14, 2013
filing date -
Jan 16, 2012
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Abstract
A method for producing a ceramic layer on a surface formed from a Ni base alloy, includes the following steps: producing on the surface a ceramic layer containing ZrO2 as a main constituent; producing a gas phase having a temperature in the range from 400 to 900° C., in which a vapor formed from a salt melt with the components alkali chloride, alkali sulphate and ZnCl2 is contained in a carrier gas formed from an inert gas with an addition from 0.5 to 10% by weight HCl; and bringing the ceramic layer into contact with the gas phase for a period of time that is sufficient for an intermediate layer having a thickness of at least 0.1 μm to form between the ceramic layer and the surface.
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