Method for forming silica-based multilayer coating on substrate from polysilazane-containing compositions
AssigneeTocalo Co., Ltd.
InventorsTakaomi Tanabe, Seiichiro Kawachi, Kosaku Hiyama
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Abstract
The method for forming a coating of the present invention includes: a first step of applying a first solution containing a polysilazane to a surface of a metal substrate and heating the first solution to form a first coating on the surface of the metal substrate, and a second step of applying a second solution containing a polysilazane to a surface of the first coating and heating the second solution at a temperature lower than a heating temperature in the first step to form a second coating on the surface of the first coating, wherein a density of the first coating is less than 2.00 g/cm3, and a density of the second coating is 2.00 g/cm3 or more.
Claims5
A method for forming a coating comprising:
- a first step of applying a first solution comprising a polysilazane consisting of perhydropolysilazane to a surface of a metal substrate and heating the first solution at a first temperature to form a first coating on the surface of the metal substrate, and
- a second step of applying a second solution comprising a polysilazane consisting of perhydropolysilazane to a surface of the first coating and heating the second solution at a second temperature lower than the first temperature to form a second coating on the surface of the first coating, wherein
- a density of the first coating is less than 2.00 g/cm3, and
- a density of the second coating is 2.00 g/cm3 or more.
Dependencies are inferred from the claim text.