Effects of Molecular Structure of Zinc Dialkyldithiophosphates on Tribological Properties of a Hydrogenated Amorphous Carbon Film under Boundary Lubrication

• Okubo Hikaru

  Graduate School, Tokyo University of Science

• Watanabe Seiya

  Graduate School, Tokyo University of Science

• Tadokoro Chiharu

  Saitama University

• Hirata Yuki

  Tokyo University of Science

• Sasaki Shinya

  Tokyo University of Science

Abstract

The effects of the molecular structure of zinc dialkyldithiophosphates (ZDDPs) on the tribological properties of a hydrogenated amorphous carbon (a-C:H) film under boundary lubrication were investigated. Friction tests were performed at a-C:H/a-C:H and steel/steel contacts under lubrication with poly-alpha olefin (PAO) and PAO containing five types of ZDDPs with different alkyl groups (primary-C4 ZDDP, secondary-C4 ZDDP, primary-C6 ZDDP, primary-C8 ZDDP and primary-C12 ZDDP). All our results suggest that the structure of the alkyl chain of ZDDPs strongly influence the tribological properties of the a-C:H/a-C:H and steel/steel tribopairs lubricated with ZDDP solutions.

Journal

• Tribology Online

  Tribology Online 12 (5), 221-228, 2017

  Japanese Society of Tribologists

Keywords

• DLC
• a-C:H
• ZDDP
• alkyl groups
• neutral-ZDDP
• basic-ZDDP

Details

• CRID: 1390001205271916928
• NII Article ID: 130006898639
• DOI: 10.2474/trol.12.221
• ISSN: 18812198
• ISSN: 1881218X
• Web Site: https://www.jstage.jst.go.jp/article/trol/12/5/12_221/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed