Effect of ZnDTP triboflim's morphology on friction behaviors of DLC coatings: Tribofilm characterization by 3D scanning electron microscope observation

Kouami Auxence Melardot Aboua*, Noritsugu Umehara, Hiroyuki Kousaka, Takayuki Tokoroyama, Motoyuki Murashima, Haci Abdullah Tasdemir, Yutaka Mabuchi, Tsuyoshi Higuchi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

ZnDTP antiwear additive for lubricating oil is known to absorb strongly on sliding surfaces in boundary lubricated tribosystems, forming a tribofilm, which is able to reduce the wear of involved surfaces. It is also known to increase the friction coefficient in most DLC/DLC contacts, with the exception of ta-C DLC / ta-C DLC contact, for which the difference in friction behaviors between a base oil + ZnDTP additive lubricated tribosystem and a base oil lubricated tribosystem is not very significant. In this study we investigate a characterization method of the shape of the tribofilm formed on different types of DLC coatings and on the relation between the shape of the tribofilm and the friction behavior of the related DLC coating. Results show that compared to other investigated DLC types, the tribofilm formed on ta-C DLC has some unique characteristic topography features that promote lower friction coefficient.

Original languageEnglish
JournalJournal of Advanced Mechanical Design, Systems and Manufacturing
Volume12
Issue number7
DOIs
Publication statusPublished - 2018

Bibliographical note

Publisher Copyright:
© 2018 The Japan Society of Mechanical Engineers.

Keywords

  • Bearing area curve
  • DLC coating
  • Friction
  • ZnDTP tribofilm

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