A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
ROLLING BEARING
PROBLEM TO BE SOLVED: To extend the life of a ceramic-made rolling bearing further and improve the corrosion resistance.SOLUTION: In a rolling bearing, at least one of an inner ring, an outer ring and rolling elements is formed by sintering a first constituent phase based on ZrOof a purity of 90% or higher and an oxide sintering auxiliary selected from YO, SiO, CeO, TiO, CaO and MgO and a second constituent phase composed of AlOof a purity of 95% or higher in a ratio of the first constituent phase:the second constituent phase of 50:50 to 95:5, and the total number of solid zirconia lumps and solid alumina lumps of particle sizes of 10-30 μm is 15 particles per 300 mmof the sintered body cross section.
【課題】セラミックス製転がり軸受の更なる長寿命化及び耐食性の向上を図る。【解決手段】内輪、外輪及び転動体の少なくとも一つが、純度９０％以上のＺｒＯ２と、Ｙ２Ｏ３、ＳｉＯ２、ＣｅＯ２、ＴｉＯ２、ＣａＯまたはＭｇＯから選ばれる酸化物焼結助剤とを主成分とする第１構成相と、純度９５％以上のＡｌ２Ｏ３からなる第２構成相とを、質量比で、第１構成相：第２構成相＝５０：５０〜９５：５の割合で焼結してなり、かつ、粒径１０〜３０μｍである中実のジルコニア塊及びアルミナ塊の合計個数が焼結体断面３００ｍｍ２当たり１５個以下であることを特徴とする転がり軸受。【選択図】図１
ROLLING BEARING
PROBLEM TO BE SOLVED: To extend the life of a ceramic-made rolling bearing further and improve the corrosion resistance.SOLUTION: In a rolling bearing, at least one of an inner ring, an outer ring and rolling elements is formed by sintering a first constituent phase based on ZrOof a purity of 90% or higher and an oxide sintering auxiliary selected from YO, SiO, CeO, TiO, CaO and MgO and a second constituent phase composed of AlOof a purity of 95% or higher in a ratio of the first constituent phase:the second constituent phase of 50:50 to 95:5, and the total number of solid zirconia lumps and solid alumina lumps of particle sizes of 10-30 μm is 15 particles per 300 mmof the sintered body cross section.
【課題】セラミックス製転がり軸受の更なる長寿命化及び耐食性の向上を図る。【解決手段】内輪、外輪及び転動体の少なくとも一つが、純度９０％以上のＺｒＯ２と、Ｙ２Ｏ３、ＳｉＯ２、ＣｅＯ２、ＴｉＯ２、ＣａＯまたはＭｇＯから選ばれる酸化物焼結助剤とを主成分とする第１構成相と、純度９５％以上のＡｌ２Ｏ３からなる第２構成相とを、質量比で、第１構成相：第２構成相＝５０：５０〜９５：５の割合で焼結してなり、かつ、粒径１０〜３０μｍである中実のジルコニア塊及びアルミナ塊の合計個数が焼結体断面３００ｍｍ２当たり１５個以下であることを特徴とする転がり軸受。【選択図】図１
ROLLING BEARING
転がり軸受
SAKAI YUTA (author) / ENDO YUICHI (author) / SHIMIZU YASUYUKI (author)
2016-01-12
Patent
Electronic Resource
Japanese
SILICON NITRIDE BALL, ROLLING ELEMENT, AND ROLLING BEARING
| European Patent Office | 2023