A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CERAMIC SINTERED BODY, BEARING BALL AND BEARING
To provide a technique for a spherical ceramic sintered body that can improve the durability of an apparatus using the ceramic sintered body.SOLUTION: In the ceramic sintered body, in which a radius is regarded as R, three line segments connecting a center and an outer surface and orthogonal to each other are regarded as a first line segment, a second line segment and a third line segment, and points on the three line segments are regarded as a first position, a second position, and a third position, at least one or more line segments of the three line segments on at least one of a first cross section including the first line segment and the second line segment, and a second cross section orthogonal to the first cross section and including the third line segment (a) satisfy 5×(3/5-A/R)≤S≤9×(10/9-A/R), where S(%) is a pore area ratio of a rectangular region at each of the three positions and A is a distance of each position from the center, and (b) in which a slope of an approximate straight line of a relationship between A and S is negative at the three positions on a coordinate plane with the distance from the center as a horizontal axis and the pore area ratio as a vertical axis.SELECTED DRAWING: Figure 5
【課題】 球状のセラミックス焼結体において、セラミックス焼結体を用いた装置の耐久性を向上する技術を提供する。【解決手段】 セラミックス焼結体は、半径をＲとし、中心と外表面とを結び、互いに直交する３つの線分を第１線分、第２線分、第３線分とし、３つの線分上の点を第１位置、第２位置、第３位置とすると、第１線分と第２線分とを含む第１断面、および、第１断面と直交し第３線分を含む第２断面の少なくとも一方において、３つの線分のうちの少なくとも１以上の線分は、（ａ）３つの位置のそれぞれにおける矩形領域の気孔面積率Ｓ（％）と、それぞれの位置の中心からの距離Ａとは、５×（３／５－Ａ／Ｒ）≦Ｓ≦９×（１０／９－Ａ／Ｒ）を満たし、（ｂ）中心からの距離を横軸とし、気孔面積率を縦軸とする座標平面上での３つの位置のＡとＳとの関係の近似直線の傾きは、負となる。【選択図】 図５
CERAMIC SINTERED BODY, BEARING BALL AND BEARING
To provide a technique for a spherical ceramic sintered body that can improve the durability of an apparatus using the ceramic sintered body.SOLUTION: In the ceramic sintered body, in which a radius is regarded as R, three line segments connecting a center and an outer surface and orthogonal to each other are regarded as a first line segment, a second line segment and a third line segment, and points on the three line segments are regarded as a first position, a second position, and a third position, at least one or more line segments of the three line segments on at least one of a first cross section including the first line segment and the second line segment, and a second cross section orthogonal to the first cross section and including the third line segment (a) satisfy 5×(3/5-A/R)≤S≤9×(10/9-A/R), where S(%) is a pore area ratio of a rectangular region at each of the three positions and A is a distance of each position from the center, and (b) in which a slope of an approximate straight line of a relationship between A and S is negative at the three positions on a coordinate plane with the distance from the center as a horizontal axis and the pore area ratio as a vertical axis.SELECTED DRAWING: Figure 5
【課題】 球状のセラミックス焼結体において、セラミックス焼結体を用いた装置の耐久性を向上する技術を提供する。【解決手段】 セラミックス焼結体は、半径をＲとし、中心と外表面とを結び、互いに直交する３つの線分を第１線分、第２線分、第３線分とし、３つの線分上の点を第１位置、第２位置、第３位置とすると、第１線分と第２線分とを含む第１断面、および、第１断面と直交し第３線分を含む第２断面の少なくとも一方において、３つの線分のうちの少なくとも１以上の線分は、（ａ）３つの位置のそれぞれにおける矩形領域の気孔面積率Ｓ（％）と、それぞれの位置の中心からの距離Ａとは、５×（３／５－Ａ／Ｒ）≦Ｓ≦９×（１０／９－Ａ／Ｒ）を満たし、（ｂ）中心からの距離を横軸とし、気孔面積率を縦軸とする座標平面上での３つの位置のＡとＳとの関係の近似直線の傾きは、負となる。【選択図】 図５
CERAMIC SINTERED BODY, BEARING BALL AND BEARING
セラミックス焼結体、ベアリングボール、および、ベアリング
SHIMURA YUKI (author) / FUNAKI KOJI (author) / ITO TSUNEYUKI (author)
2022-03-16
Patent
Electronic Resource
Japanese
SILICON NITRIDE SINTERED COMPACT, BEARING BALL AND BEARING
| European Patent Office | 2021
SILICON NITRIDE SINTERED COMPACT, ABRASION-RESISTANT MEMBER, BEARING BALL, AND BEARING
| European Patent Office | 2024
SILICON NITRIDE SINTERED BODY, MACHINE PART, AND BEARING
| European Patent Office | 2024