| 학회 |
한국재료학회 |
| 학술대회 |
2018년 가을 (11/07 ~ 11/09, 여수 디오션리조트) |
| 권호 |
24권 2호 |
| 발표분야 |
9. 한-일 재료공학 심포지엄(KMST 2018)-오거나이저: 권도균 교수(한국항공대) |
| 제목 |
Application of Zinc Oxide Coatings to Ball Bearing System |
| 초록 |
Saving fuel consumption is one of promising solutions for resource depletion and global environmental problem of greenhouse effect. Friction loss should be reduced in the moving parts, bearings, in a turbine system and in or der to save fuel and extend the lifetime of the moving parts. Friction coefficients of solid lubricants increase due to oxidation in air, in oil, especially under harsh condition of high-temperature. Harmless zinc oxide coating is a strong candidate to solve this problem because of the stable crystal structure under harsh condition. Friction coefficient of zinc oxides known so far is usually too large to be used as lubricative coatings. We have therefore tried to develop reduction method of friction of metal oxide coatings with crystal preferred orientation to generate piezoelectric effect by means of a combinatorial sputter deposition process for ball bearing system. Bearing system installed with ZnO surface-coated balls inside was tested as change in friction during rotation under 196N in order to be compared with a bearing system without ZnO coated balls. The bearing system with ZnO coated balls inside shows about half lower friction than the bearing system without ZnO coated balls and will be a good candidate for an advanced ball bearing system in the near future. A small size gas turbine generator system with ball bearing coated with ZnO was tested and it is shown that the system can improve energy efficiency up to more than a percentage. |
| 저자 |
Masahiro TOSA1, Michiko SASAKI2, Masahiro GOTO1, Akira KASAHARA2, Hiroshi SUZUKI1, Hiroshi HONDA2
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| 소속 |
1National Institute for Materials Science, 2Japan |
| 키워드 |
Ball Bearings; Combinatorial Sputter Deposition Process; Small Gas Turbine Generator; Zinc Oxide
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| E-Mail |
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