Sialon sintered body and cutting insert
AssigneeNgk Spark Plug Co., Ltd.
InventorsHiroko Nakayama, Ryoji Toyoda
Life of this patent
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Abstract
The present invention provides a technique of improving wear resistance of a Sialon sintered body. The Sialon sintered body has a Sialon phase including at least a β-Sialon and a 12H-Sialon among an α-Sialon, the β-Sialon and the 12H-Sialon. A ratio of a second Sialon total content, which is a sum of the contents of the α-Sialon and the 12H-Sialon, to a first Sialon total content, which is a sum of contents of the α-Sialon, the β-Sialon and the 12H-Sialon, is greater than 20% and not greater than 55%, and a ratio of the content of the 12H-Sialon to the first Sialon total content is not less than 2% and not greater than 55%.
Claims7
A Sialon sintered body having a Sialon phase comprising at least a β-Sialon and a 12H-Sialon among an α-Sialon, the β-Sialon and the 12H-Sialon,
- wherein a ratio of a second Sialon total content to a first Sialon total content is greater than 20% and not greater than 55%, and a ratio of the content of the 12H-Sialon to the first Sialon total content is not less than 2% and not greater than 55% (excluding not greater than 5%), wherein the first Sialon total content is a sum of contents of the α-Sialon, the β-Sialon and the 12H-Sialon and the second Sialon total content is a sum of the contents of the α-Sialon and the 12H-Sialon.
Dependencies are inferred from the claim text.