Environment-resistive coated reinforcement fiber applicable to fiber-reinforced composite

Patent metadata

Field	Value
Publication number	US-11873604-B2
Application number	US-202016877715-A
Country	US
Kind code	B2
Filing date	May 19, 2020
Priority date	Nov 27, 2017
Publication date	Jan 16, 2024
Grant date	Jan 16, 2024

Abstract

A high-temperature-steam-oxidation-resistive coated reinforcement fiber applicable to a fiber reinforced composite, is provided with: a reinforcement fiber; a coating layer covering the reinforcement fiber and including a rare-earth silicate; an exfoliative layer intervening in an interface between the coating layer and the reinforcement fiber; and a supplemental coating layer covering the reinforcement fiber, the exfoliative layer and the coating layer.

First claim

What is claimed is:

1. An environment-resistive coated reinforcement fiber applicable to a fiber reinforced composite, comprising:
a reinforcement fiber;
a coating layer covering the reinforcement fiber and including a rare-earth silicate;
an exfoliative layer intervening in an interface between the coating layer and the reinforcement fiber and in direct contact with the reinforcement fiber; and
a supplemental coating layer covering the reinforcement fiber, the exfoliative layer and the coating layer,
wherein the exfoliative layer is formed by executing first heating on the reinforcement fiber under a first atmosphere including an organic rare-earth compound at a first temperature, the first temperature being 650° C., and
wherein the coating layer is formed by executing second heating on the reinforcement fiber after being exposed to the first heating under a second atmosphere at a second temperature, the second temperature being higher than the first temperature and being 900° C.

2. The coated reinforcement fiber of claim 1 , wherein the supplemental coating layer includes silicon carbide.

3. The coated reinforcement fiber of claim 1 , wherein the exfoliative layer includes a rare-earth silicate.

4. The coated reinforcement fiber of claim 3 , wherein the rare-earth silicate in the coating layer and the exfoliative layer is ytterbium silicate.

5. The coated reinforcement fiber of claim 1 , wherein the reinforcement fiber includes silicon carbide.

6. The coated reinforcement fiber of claim 1 , wherein the second atmosphere includes an organic rare-earth compound identical to the organic rare-earth compound in the first atmosphere.

7. The coated reinforcement fiber of claim 2 , wherein the exfoliative layer includes a rare-earth silicate.

8. The coated reinforcement fiber of claim 7 , wherein the rare-earth silicate in the coating layer and the exfoliative layer is ytterbium silicate.

Assignees

• Ihi Corp
• Nat Univ Corp Yokohama Nat Univ
• Japan Fine Ceramics Ct

Inventors

• Nakamura Takeshi
• Kotani Masahiro
• Goto Ken
• Ito Akihiko
• Kitaoka Satoshi
• Yokoe Daisaku
• Matsuda Tetsushi

Classifications

• C08K2003/343

  Peroxyhydrates, peroxyacids or salts thereof · CPC title

• C08K3/14

  Carbides · CPC title

• C08K9/02

  Ingredients treated with inorganic substances · CPC title

• C08K7/10

  Silicon-containing compounds · CPC title

• D06M11/79 Primary

  with silicon dioxide, silicic acids or their salts · CPC title