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Low- friction sliding mechanism and uses thereof

a sliding mechanism and low friction technology, applied in mechanical devices, hoisting equipment, machines/engines, etc., can solve the problem that no research has been made on the material combination of ionic liquid and sliding members

Inactive Publication Date: 2008-03-27
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0003]There are attempts to apply the ionic liquids as lubricants to sliding members and thereby benefit from the excellent properties of the ionic liquids as reported in Non-Patent Document 1. In particular, Non-Patent Document 1 suggests that the ionic liquids have the potential for, when the viscosities of the ionic liquids are lowered for use as the lubricants, minimizing viscosity losses and securing high heat resistance and long-term stable properties.[Non-Patent Document 1] Functional Materials, “Application of Ionic Liquids to Tribology”, Hideto Kamimura, Ichiro Minami and Masayuki Mori, No. 11, vol. 24 (2004), 63″

Problems solved by technology

However, no researches have been made on the material combinations of the ionic liquids and the sliding members.

Method used

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  • Low- friction sliding mechanism and uses thereof
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  • Low- friction sliding mechanism and uses thereof

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Embodiment Construction

[0013]The present invention will be described below in detail. In the following description, all percentages (%) are by mass unless otherwise specified.

[0014]A low-friction sliding mechanism according to one exemplary embodiment of the present invention includes a pair of sliding members having sliding surfaces slidable relative to each other and a lubricant applied to the respective sliding surfaces, characterized in that: at least one of the sliding surfaces has a thin coating of either a diamond-like carbon (DLC) material, a diamond material or a combination thereof, and the lubricant is either an ionic liquid consisting of cation and anion components and existing in liquid or gel form at room temperature or an ionic conductive composition thereof.

[0015]Preferably, the DLC material and the diamond material have a sp3 / sp2 carbon ratio of 2 or greater. If the sp3 / sp2 carbon ratio is smaller than 2, the DLC material and the diamond material are too low in hardness to obtain a suffic...

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Abstract

A low-friction sliding mechanism includes a pair of sliding members having respective sliding surfaces slidable relative to each other and an ionic liquid applied to the respective sliding surfaces. At least one of the sliding surfaces has a coating of either a diamond-like carbon material, a diamond material or a combination thereof. The ionic liquid consists of cation and anion components and exists in liquid or gel form at room temperature.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a low-friction sliding mechanism and uses thereof.[0002]In recent years, much attention has been given to “ionic liquids”. The ionic liquids refer to organic salts consisting of cations and anions and existing in liquid form at room temperature and are also called “room-temperature molten salts”, “ion liquids”, “ion fluids”, “ionic oils” etc. It is known that the ionic liquids exhibit different properties from those of ordinary organic solvents. For example, although the ordinary organic solvents show volatility and flammability due to their vapor pressures, the ionic liquids have very low negligible vapor pressures and show nonvolatility and thermal stability. In addition, the ionic liquids are chemically and electrochemically stable.SUMMARY OF THE INVENTION[0003]There are attempts to apply the ionic liquids as lubricants to sliding members and thereby benefit from the excellent properties of the ionic liquids as rep...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M103/02C10M105/00C10M105/70C10N20/06C10N30/06C10N40/02F02F1/00F02F3/10F02F5/00F16C33/24F16H53/02F16H55/06F16J1/01
CPCF16C33/04F16C2206/04F16C33/6688F16C2240/54F16C2240/64Y02T10/86
Inventor NANBU, TOSHIKAZUYASUDA, YOSHITERUUENO, TAKAFUMISAKANE, TOKIOTAKEKAWA, TOSHIHIRO
Owner NISSAN MOTOR CO LTD
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