A study on self-lubrication film with tribo-chemical reaction for repairing process of surface damage in hybrid polymer bearing

• Project/Area Number: 19K04150
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18040:Machine elements and tribology-related
• Research Institution: University of Miyazaki
• Principal Investigator: KOIKE HITONOBU 宮崎大学, 工学部, 助教 (40603329)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000); Fiscal Year 2021: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: 樹脂軸受 / 樹脂機械要素 / ＰＥＥＫ構造・物性 / 自己潤滑膜 / 摩擦化学 / 高機能樹脂 / 長寿命化 / グラファイト / 転がり滑り / マイクログルーヴ / 転がり疲労 / 機械要素 / 摩擦化学反応 / トライボロジー

Outline of Research at the Start

プラスチックおよびセラミックス部品で構成されるハイブリッド軸受の稼働中に生じる自己潤滑膜の解明を通じて，損傷を生き物の様に修復する機能をそなえた自己修復軸受の開発に挑む．摩擦化学反応を利用した損傷修復挙動を疲労テストおよび高分子分析から明らかにし，低摩擦化や高強度化など最適なトライボロジー設計に活かす．特殊環境下でのハイブリッド高分子機械要素の寿命リスクを低減できるので，海洋資源開発分野やバイオエネルギー機器，医療機器材料分野などに適用域を拡げ応用が期待できる．

Outline of Final Research Achievements

The objective of this study was to clarify the effect of the self-lubrication film and formation of the PEEK composite film. Rolling contact test was carried out by using Hybrid radial PEEK bearing with surface defects. It was found that the size of the surface defects was decreased by accumulation of the PEEK composite film.
This result shows the possibility of suitable tribological contact surface and knowledge to control the self-lubrication film of PEEK composite for long life of polymer mechanical element.

Academic Significance and Societal Importance of the Research Achievements

本研究成果では，PEEK樹脂機械要素の自己潤滑膜の制御と長寿命化に影響を及ぼす表面キズを無害化できる可能性を示した．微細溝を有する軸受軌道面にグラファイトのナノ粒子を含んだ自己潤滑膜が生成したことを発見した．自己修復機能を持つ樹脂機械要素として低摩擦と長寿命化が期待でき，材料損失や故障リスクが減り省資源化にも貢献できる．今後，気液潤滑下など特殊環境用としてハイブリッド樹脂機械要素の長寿命化技術に発展させ，エネルギー機器材料分野などに適用域を拡げ応用が期待される．

Research Products

• [Journal Article] PEEK/graphite film formation on microgrooves of PEEK- hybrid radial Al2O3 ball bearings under rolling contact in dry condition (2022)
  • Author(s): Koike Hitonobu、Kida Katsuyuki、Mizobe Koshiro、Matsumura Toshihiko、Inagaki Masahiro
  • Journal Title: Tribology International Volume: 172 Pages: 107583-107583
  • DOI: 10.1016/j.triboint.2022.107583
  • Peer Reviewed
• [Journal Article] Influence on Tribological Behavior of PEEK Composite Film Layer on PEEK-PTFE Bearings with Artificial Defect in Dry Condition (2021)
  • Author(s): Koike Hitonobu、Mizobe Koshiro、Kida Katsuyuki
  • Journal Title: Key Engineering Materials Volume: 904 Pages: 243-249
  • DOI: 10.4028/www.scientific.net/kem.904.243
  • Peer Reviewed
• [Journal Article] Observation of Tribological Wear on PEEK Shaft with Artificial Defect under Radial Rolling Sliding Point Contact (2020)
  • Author(s): Koike Hitonobu、Haruta Junki、Deng Gang、Mizobe Koshiro、Kida Katsuyuki
  • Journal Title: Key Engineering Materials Volume: 858 Pages: 95-100
  • DOI: 10.4028/www.scientific.net/kem.858.95
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Observation of Tribological Fatigue Fracture on PEEK Shaft with Artificial Defect under One-Point Rolling Contact by Using 2.5D Layer Method (2019)
  • Author(s): Koike Hitonobu、Yamada Shuta、Deng Gang、Mizobe Koshiro、Yamada Takuto、Kida Katsuyuki
  • Journal Title: Key Engineering Materials Volume: 814 Pages: 314-319
  • DOI: 10.4028/www.scientific.net/kem.814.314
  • Peer Reviewed
• [Presentation] Observation of PEEK/graphite film on raceway surface of PEEK-hybrid ball bearing with microgrooves (2023)
  • Author(s): Hitonobu KOIKE,Wataru NAKAIKE,Koshiro MIZOBE, Katuyuki KIDA
  • Organizer: ITC Fukuoka 2023
  • Int'l Joint Research
• [Presentation] Influence on tribological behavior of PEEK composite film layer on PEEK-PTFE bearings with artificial defect in dry condition (2021)
  • Author(s): Hitonobu KOIKE
  • Organizer: 10th International Conference on Advanced Materials and Engineering Materials
  • Int'l Joint Research
• [Presentation] Observation of Tribological Wear on PEEK Shaft with Artificial Defect under Radial Rolling Sliding Point Contact (2019)
  • Author(s): Hitonobu KOIKE, Junki HARUTA, Gang DENG, Koshiro MIZOBE, Katsuyuki KIDA
  • Organizer: CMPSE2019
  • Int'l Joint Research
• [Presentation] Observation of tribological fatigue fracture on PEEK shaft with artificial defect under one-point rolling contact by using 2.5D layer method (2019)
  • Author(s): Hitonobu KOIKE, Shuta YAMADA, Gang DENG, Koshiro MIZOBE, Takuto YAMADA, and Katsuyuki KIDA
  • Organizer: ICAMEM2019
  • Int'l Joint Research