Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
SILICON NITRIDE SINTERED COMPACT, AND ROLLING ELEMENT AND BEARING USING THE SAME
To provide a silicon nitride sintered compact excellent in mechanical characteristics, fracture toughness in particular, and providing a long product life when processed into a product; and a rolling element and a bearing using the same.SOLUTION: A silicon nitride sintered compact of this invention includes a rare-earth element and aluminum element, in which the rare-earth element is contained 6 wt.% or more and 13 wt.% or less in terms of an oxide relative to the total weight of the silicon nitride sintered compact, and the aluminum element is contained 6 wt.% or more and 13 wt.% or less in terms of an oxide relative to the total weight of the silicon nitride sintered compact. The silicon nitride sintered compact includes an inclusion (I) in a surface layer part which is a region 2 mm or less from the surface of the silicon nitride sintered compact, in which the ratio of the total cross-sectional area of the inclusion (I) to the total cross-sectional area of the surface layer part is 0.05% or higher.SELECTED DRAWING: Figure 1
【課題】機械的特性、特に破壊靱性が良好であり、製品に加工した場合に良好な製品寿命を有する窒化ケイ素焼結体、それを用いた転動体、および軸受を提供する。【解決手段】窒化ケイ素焼結体は、希土類元素およびアルミニウム元素を含み、希土類元素の含有量は、窒化ケイ素焼結体の総重量に対して、酸化物換算で６重量％以上１３重量％以下であり、アルミニウム元素の含有量は、窒化ケイ素焼結体の総重量に対して、酸化物換算で６重量％以上１３重量％以下であり、窒化ケイ素焼結体の表面から２ｍｍ以内の領域である表層部に介在物（Ｉ）を有し、表層部の総断面積に対する介在物（Ｉ）の総断面積の割合は０．０５％以上である。【選択図】図１
SILICON NITRIDE SINTERED COMPACT, AND ROLLING ELEMENT AND BEARING USING THE SAME
To provide a silicon nitride sintered compact excellent in mechanical characteristics, fracture toughness in particular, and providing a long product life when processed into a product; and a rolling element and a bearing using the same.SOLUTION: A silicon nitride sintered compact of this invention includes a rare-earth element and aluminum element, in which the rare-earth element is contained 6 wt.% or more and 13 wt.% or less in terms of an oxide relative to the total weight of the silicon nitride sintered compact, and the aluminum element is contained 6 wt.% or more and 13 wt.% or less in terms of an oxide relative to the total weight of the silicon nitride sintered compact. The silicon nitride sintered compact includes an inclusion (I) in a surface layer part which is a region 2 mm or less from the surface of the silicon nitride sintered compact, in which the ratio of the total cross-sectional area of the inclusion (I) to the total cross-sectional area of the surface layer part is 0.05% or higher.SELECTED DRAWING: Figure 1
【課題】機械的特性、特に破壊靱性が良好であり、製品に加工した場合に良好な製品寿命を有する窒化ケイ素焼結体、それを用いた転動体、および軸受を提供する。【解決手段】窒化ケイ素焼結体は、希土類元素およびアルミニウム元素を含み、希土類元素の含有量は、窒化ケイ素焼結体の総重量に対して、酸化物換算で６重量％以上１３重量％以下であり、アルミニウム元素の含有量は、窒化ケイ素焼結体の総重量に対して、酸化物換算で６重量％以上１３重量％以下であり、窒化ケイ素焼結体の表面から２ｍｍ以内の領域である表層部に介在物（Ｉ）を有し、表層部の総断面積に対する介在物（Ｉ）の総断面積の割合は０．０５％以上である。【選択図】図１
SILICON NITRIDE SINTERED COMPACT, AND ROLLING ELEMENT AND BEARING USING THE SAME
窒化ケイ素焼結体、それを用いた転動体、および軸受
NAKAMURA FUMIYA (Autor:in) / HAYAKAWA YASUTAKE (Autor:in)
15.03.2022
Patent
Elektronische Ressource
Japanisch
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