Patent ID: 11873604
Assignee: IHI CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  D  Y | IPC C  D

Claim 0:
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.