Corrosion-resistant member

Patent metadata

Field	Value
Publication number	US-11208359-B2
Application number	US-201816489015-A
Country	US
Kind code	B2
Filing date	Feb 23, 2018
Priority date	Feb 27, 2017
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

A corrosion-resistant member according to the present disclosure includes a substrate that is composed of an aluminum-oxide-based ceramic and a covering layer that is composed of an O—Al—C layer that is located on the substrate.

First claim

The invention claimed is:

1. A corrosion-resistant member, comprising:
a substrate that is composed of an aluminum-oxide-based ceramic; and
a covering layer that is composed of an O—Al—C layer that is located on the substrate,
wherein the aluminum-oxide-based ceramic includes at least 90% by mass of aluminum oxide.

2. The corrosion-resistance member according to claim 1 , wherein an element concentration of carbon on a surface of the covering layer is 25 atomic % or greater and 55 atomic % or less.

3. The corrosion-resistance member according to claim 1 , wherein a thickness of the covering layer is 10 nm or greater and 100 nm or less.

4. The corrosion-resistance member according to claim 1 , wherein a ratio A/B of the covering layer is 5 or greater in a case where A is an element concentration of carbon on a surface of the covering layer and B is an element concentration of carbon at a depth of 6 nm from the surface of the covering layer toward a side of the substrate in a perpendicular direction to the surface of the covering layer.

5. The corrosion-resistance member according to claim 1 , wherein a ratio B/C of the covering layer is 2 or less in a case where B is an element concentration of carbon at a depth of 6 nm from a surface of the covering layer toward a side of the substrate and C is an element concentration of carbon at a depth of 10 nm from the surface of the covering layer toward a side of the substrate in a perpendicular direction to the surface of the covering layer.

Assignees

• Kyocera Corp

Inventors

• Iida Shuichi
• Oota Mizuho
• Toyoda Satoshi
• Takenoshita Hidehiro

Classifications

• C04B41/87 Primary

  Ceramics · CPC title

• C04B41/4556 Primary

  coating or impregnating with a product reacting with the substrate, e.g. generating a metal coating by surface reduction of a ceramic substrate · CPC title

• C04B2235/3206

  Magnesium oxides or oxide-forming salts thereof · CPC title

• C04B35/62655

  Drying, e.g. freeze-drying, spray-drying, microwave or supercritical drying · CPC title

• C04B2235/3418

  Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint · CPC title