Silicon nitride wear resistant member and method for producing silicon nitride sintered compact
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United States of America Patent
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May 30, 2017
Issued Date -
N/A
app pub date -
Jun 11, 2014
filing date -
Jun 13, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention provides a silicon nitride wear resistant member comprising a silicon nitride sintered compact containing β-Si3N4 crystal grains as a main component, 2 to 4% by mass of a rare earth element in terms of oxide, 2 to 6% by mass of Al in terms of oxide, and 0.1 to 5% by mass of Hf in terms of oxide, wherein the silicon nitride sintered compact has rare earth-Hf—O compound crystals; in an arbitrary section, an area ratio of the rare earth-Hf—O compound crystals in a grain boundary phase per unit area of 30 μm×30 μm is 5 to 50%; and variation of the area ratios of the rare earth-Hf—O compound crystals between the unit areas is 10% or less. Due to above structure, there can be provided a wear resistant member comprising the silicon nitride sintered compact having an excellent wear resistance and processability.
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International Classification(s)
- 2014 Application Filing Year
- C04B Class
- 1184 Applications Filed
- 1032 Patents Issued To-Date
- 87.17 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- C04B Class
- 0 % this patent is cited more than
- 8 Age
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