Title:
SILICON CARBIDE SINTERED BODY HAVING OXIDATION RESISTANCE LAYER, AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2019/231045
Kind Code:
A1
Abstract:
The present invention provides a silicon carbide sintered body formed with a plurality of grains made of silicon carbide concentrated close to each other, the silicon carbide sintered body having, on boundary surfaces of the grains forming the sintered body and at a junction at which the boundary surfaces of the grains meet, elements Sc and Y in a rich phase without melting into the grains, thereby allowing sintering at a temperature equal to or less than 1950 ℃, while forming, without EB coating processing, an EB layer comprising on the surface thereon a rare earth-Si oxide comprising elements Sc and Y. In addition, the silicon carbide sintered body reduces the possibility of separation of the EB layer as the EB layer extends into the inner regions of the silicon carbide matrix and forms a strong three-dimensional bond, and, when separation does occur, a new EB layer is formed, thereby greatly increasing the resistance of a silicon carbide material against corrosion due to oxidation, and the use temperature of the silicon carbide material can be increased by preventing oxidation of the silicon carbide material.
Inventors:
LIM KWANG-YOUNG (KR)
LEE SEUNG-JAE (KR)
NA YEON-SOO (KR)
JUNG TAE SIK (KR)
LEE SEUNG-JAE (KR)
NA YEON-SOO (KR)
JUNG TAE SIK (KR)
Application Number:
PCT/KR2018/008638
Publication Date:
December 05, 2019
Filing Date:
July 30, 2018
Export Citation:
Assignee:
KEPCO NUCLEAR FUEL CO LTD (KR)
International Classes:
C04B35/575; C04B35/626; C04B35/63
Foreign References:
| KR101860477B1 | 2018-05-23 | |||
| JP2001261470A | 2001-09-26 | |||
| KR101698378B1 | 2017-01-20 | |||
| KR20140069090A | 2014-06-09 | |||
| KR20160083194A | 2016-07-12 | |||
| KR101174627B1 | 2012-08-17 | |||
| KR20170104894A | 2017-09-18 | |||
| KR101178234B1 | 2012-08-30 | |||
| KR101308907B1 | 2013-09-23 | |||
| KR101698378B1 | 2017-01-20 |
Other References:
See also references of EP 3604256A4
KIM ET AL., JOURNAL OF AMERICAN CERAMIC SOCIETY, vol. 97, no. 3, 2014, pages 923 - 928
KIM ET AL., JOURNAL OF AMERICAN CERAMIC SOCIETY, vol. 97, no. 3, 2014, pages 923 - 928
Attorney, Agent or Firm:
LEE, Un Cheol (KR)
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