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SILICON NITRIDE SINTERED BODY, MACHINE PART, AND BEARING
To provide a silicon nitride sintered body, a machine part and a bearing that have superior mechanical properties and sliding properties. A rolling element 4 is a silicon nitride sintered body including a silicon nitride particle, a rare earth element and an aluminum element. In a range in which the sum of the area of the upper-size crystal grain diameter within a range where the crystal grain diameter of a β-type Si3N4 particle in the silicon nitride sintered body has the crystal orientation of 15-180 degrees, is 30% relative to an area of the total crystal grain diameter, the crystal grain diameter of the β-type Si3N4 particle is 1-4 μm by circle equivalent diameter and/or the aspect ratio of the β-type Si3N4 particle is 3-6.
SILICON NITRIDE SINTERED BODY, MACHINE PART, AND BEARING
To provide a silicon nitride sintered body, a machine part and a bearing that have superior mechanical properties and sliding properties. A rolling element 4 is a silicon nitride sintered body including a silicon nitride particle, a rare earth element and an aluminum element. In a range in which the sum of the area of the upper-size crystal grain diameter within a range where the crystal grain diameter of a β-type Si3N4 particle in the silicon nitride sintered body has the crystal orientation of 15-180 degrees, is 30% relative to an area of the total crystal grain diameter, the crystal grain diameter of the β-type Si3N4 particle is 1-4 μm by circle equivalent diameter and/or the aspect ratio of the β-type Si3N4 particle is 3-6.
SILICON NITRIDE SINTERED BODY, MACHINE PART, AND BEARING
ITO YUTA (author) / HAYAKAWA YASUTAKE (author)
2024-12-26
Patent
Electronic Resource
English
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