SUS440C軸受における酸化クロム皮膜の評価

Material type: 文書・図像類

Author: 高田, 仁志ほか

Publisher: 宇宙航空研究開発機構

Publication date: 2006-01-20

Material Format: Digital

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Note (General)：: In order to realize Liquid Oxygen (LO2)/Liquid Hydrogen (LH2) pump-fed rocket engines characterized by high durability, the cryogenic high-speed beari...

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Material Type: 文書・図像類
Title: SUS440C軸受における酸化クロム皮膜の評価
Author/Editor: 高田, 仁志
渡辺, 義明
吉田, 誠
Takada, Satoshi
Watanabe, Yoshiaki
Yoshida, Makoto
Author Heading: 高田, 仁志
渡辺, 義明
吉田, 誠
Takada, Satoshi
Watanabe, Yoshiaki
Yoshida, Makoto
Publication, Distribution, etc.: 宇宙航空研究開発機構
Publication Date: 2006-01-20
Publication Date (W3CDTF): 2006-01-20
Alternative Title: Evaluation of chromic oxide layer for SUS440C bearing
Periodical title: 宇宙航空研究開発機構特別資料: 平成16年度総合技術研究本部宇宙領域宇宙科学研究本部合同研究成果報告書:宇宙輸送系基盤技術 = JAXA Special Publication: FY2004 Report of Joint Research Achievements of the Space Division of Institute of Aerospace Technology and Institute of Space and Astronautical Science: Basic Technologies of Space Transportation Systems
No. or year of volume/issue: JAXA-SP-05-010
Volume: JAXA-SP-05-010
Pages: 49-52
ISSN (Periodical Title): ISSN : 1349-113X
Text Language Code: jpn
Subject Heading: 耐磨耗性
液体燃料ロケットエンジン
SUS440C
液体水素
液体酸素
高速軸受
潤滑膜
極低温
トライボロジー
wear resistance
liquid propellant rocket engine
liquid hydrogen
liquid oxygen
high-speed bearing
lubricant film
cryogenic temperature
tribology
Target Audience: 一般
Note (General): In order to realize Liquid Oxygen (LO2)/Liquid Hydrogen (LH2) pump-fed rocket engines characterized by high durability, the cryogenic high-speed bearings used in the turbopumps must have high wear-resistance. These bearings made of SUS440C were self-lubricated with a glass cloth-reinforced PTFE retainer. In a previous study, the bearing exhibited excellent durability in at a speed of 50,000 rpm. XPS analysis indicated the intense formation of a chromic oxide (Cr2O3) layer (thickness, about 15 nm) beneath an extremely thin transferred lubricant-film. To reduce the bearing wear, the pre-formation of a thick Cr2O3 layer, which restrained metal-to-metal adhesion, seemed to be effective, because the untreated bearing had an extremely thin native Cr2O3 layer (about 2.5 nm). The purpose of this study is to evaluate the Cr2O3 layer chemically formed on the SUS440C ball. These results showed that a considerably thick Cr2O3 layer on a SUS440C surface was successfully formed by heat treatment at a low concentration of oxygen. Friction and wear of the Cr2O3 layer chemically formed was found to be better than that of the untreated ball in LN2.
資料番号: AA0049056010
レポート番号: JAXA-SP-05-010
Access Restrictions: 限定公開
Periodical Title (NCID): AA11984031
https://ci.nii.ac.jp/ncid/AA11984031
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ