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Title:
SILICON CARBIDE MATRIX COMPOSITE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2021/205820
Kind Code:
A1
Abstract:
The present invention significantly improves mechanical properties such as strength and fracture toughness in a silicon carbide matrix composite material in which heat-resistant long fibers such as carbon fibers function as a reinforcing material and silicon carbide functions as a matrix. This silicon carbide matrix composite material contains a silicon carbide matrix and heat-resistant long fibers. The silicon carbide matrix contains both α-silicon carbide and β-silicon carbide. The α-silicon carbide and β-silicon carbide are detected by micro X-ray diffraction using an X-ray beam diameter no greater than 300μm in essentially the entire region of essentially the entire cross-section of the silicon carbide matrix. The average crystallite diameter of the β-silicon carbide is no greater than 500nm, and is larger than the average crystallite diameter of the α-silicon carbide. The porosity thereof is no greater than 20 vol%.

Inventors:
MURAKAWA NORIHITO (JP)
TAKEDA SOTARO (JP)
SATO SHIN (JP)
SASAKI KAZUTO (JP)
Application Number:
PCT/JP2021/010446
Publication Date:
October 14, 2021
Filing Date:
March 15, 2021
Export Citation:
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Assignee:
JAPAN FINE CERAM CO LTD (JP)
International Classes:
C04B35/80; D01F9/08
Domestic Patent References:
WO2017217378A12017-12-21
Foreign References:
JP2019081684A2019-05-30
JPH06287061A1994-10-11
Attorney, Agent or Firm:
SATO & ASSOCIATES (JP)
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