Title:
SILICON NITRIDE SINTERED BODY, WEAR-RESISTANT MEMBER USING SAME, AND METHOD FOR MANUFACTURING SILICON NITRIDE SINTERED BODY
Document Type and Number:
WIPO Patent Application WO/2021/235343
Kind Code:
A1
Abstract:
This silicon nitride sintered body is characterized in that at least one black part having a major diameter of at least 10 μm is present in a visual field having a unit area of 5mm×5mm when any cross section of said silicon nitride sintered body is observed with a metallographic microscope. Moreover, the major diameter of the black part is preferably at most 500 μm. Further, it is preferable that two to ten black parts are present in the visual field having a unit area of 5mm×5mm. Furthermore, it is preferable that a Fe segregation part is present in the black part.
Inventors:
AOKI KATSUYUKI (JP)
FUNAKI KAI (JP)
FUKASAWA TAKAYUKI (JP)
SANO SHOYA (JP)
FUNAKI KAI (JP)
FUKASAWA TAKAYUKI (JP)
SANO SHOYA (JP)
Application Number:
PCT/JP2021/018384
Publication Date:
November 25, 2021
Filing Date:
May 14, 2021
Export Citation:
Assignee:
TOSHIBA KK (JP)
TOSHIBA MATERIALS CO LTD (JP)
TOSHIBA MATERIALS CO LTD (JP)
International Classes:
F16C33/32; C04B35/587
Foreign References:
| JP2001114565A | 2001-04-24 | |||
| JPH06287006A | 1994-10-11 | |||
| JPH0680470A | 1994-03-22 | |||
| JPS62158167A | 1987-07-14 | |||
| JP2017075073A | 2017-04-20 | |||
| JPH10231174A | 1998-09-02 | |||
| JP5944910B2 | 2016-07-05 |
Attorney, Agent or Firm:
TOKYO INTERNATIONAL PATENT FIRM (JP)
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