0
Research Papers: Friction and Wear

AntiWear Effect of Mo and W Nanoparticles as Additives for Multialkylated Cyclopentanes Oil in Vacuum

[+] Author and Article Information
Songwei Zhang

State Key Laboratory of Solid Lubrication,
Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences,
No. 18, Tianshui Middle Road,
Lanzhou 730000, China;
Qingdao Center of Resource
Chemistry & New Material,
No. 36, Jinshui Road,
Qingdao 266071, China
e-mail: zhangsw@licp.cas.cn

Yi Li

School of Chemistry and Chemical Engineering,
University of Chinese Academy of Sciences,
No. 19A Yuquan Road,
Beijing 100049, China;
State Key Laboratory of Solid Lubrication,
Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences,
No. 18, Tianshui Middle Road,
Lanzhou 730000, China
e-mail: liyi@licp.cas.cn

Litian Hu

State Key Laboratory of Solid Lubrication,
Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences,
No. 18, Tianshui Middle Road,
Lanzhou 730000, China
e-mail: lthu@licp.cas.cn

Dapeng Feng

State Key Laboratory of Solid Lubrication,
Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences,
No. 18, Tianshui Middle Road,
Lanzhou 730000, China
e-mail: dpfeng@licp.cas.cn

Haizhong Wang

State Key Laboratory of Solid Lubrication,
Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences,
No. 18, Tianshui Middle Road,
Lanzhou 730000, China
e-mail: whzhlsl@licp.cas.cn

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received January 12, 2016; final manuscript received May 9, 2016; published online August 11, 2016. Assoc. Editor: Min Zou.

J. Tribol 139(2), 021607 (Aug 11, 2016) (8 pages) Paper No: TRIB-16-1016; doi: 10.1115/1.4033638 History: Received January 12, 2016; Revised May 09, 2016

This work examined friction-reducing and antiwear behaviors of multialkylated cyclopentanes (MACs) oil with Mo and W nanoparticles as additives under vacuum condition (∼10−4 Pa). The tribological evaluation was conducted on a vacuum four-ball tribometer. The results suggested that the MACs oil exhibited the transient high friction in vacuum, resulted into severe adhesive wear to the steel friction pairs. The Mo and W nano-additives could effectively eliminate the severe adhesive wear. When added with Mo nanoparticles, the lubricating life of MACs oil could be prolonged due to the retarded decomposition of MACs, which should be ascribed to the formation of Mo metallic boundary films on steel ball surfaces that was confirmed by the surface analysis. As for W nanoparticle additives, the rolling effect as nano-bearings and the abrasive wear of larger particles due to the aggregation of W nanoparticles are the dual tribological mechanisms.

FIGURES IN THIS ARTICLE
<>
Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Transmission electron microscopy (TEM) micrographs of nanoparticles: (a) Mo and (b) W

Grahic Jump Location
Fig. 2

Maximum nonseizure loads (PB values) of Mo and W nanoparticles

Grahic Jump Location
Fig. 3

WSD values (a) and average friction coefficient and (b) as a function of nanoparticle concentration

Grahic Jump Location
Fig. 4

Friction coefficient as a function of rotating time for MACs with nanoparticles under vacuum condition: (a) Mo and (b) W

Grahic Jump Location
Fig. 5

SEM micrographs of the wear scar surfaces for the different oil samples: (a) base oil, (b) 0.1 wt.% Mo, (c) 0.5 wt.% Mo, (d) 1 wt.% Mo, (e) 0.1 wt.% W, (f) 0.5 wt.% W, and (g) 1 wt.% W

Grahic Jump Location
Fig. 6

SEM micrographs and EDX analysis of the worn surfaces: (a) surface elemental analysis for 0.5 wt.% Mo, (b) high-magnification SEM micrograph for MACs oil, (c) high-magnification SEM micrograph for 0.5 wt.% Mo, (d) Fe elements mapping for 0.5 wt.% Mo, and (e) Mo elements

Grahic Jump Location
Fig. 7

Typical elements mapping of wear scar surfaces under vacuum condition lubricated by: (a) MACs and (b) 0.5 wt.% Mo nanoparticles

Grahic Jump Location
Fig. 8

XPS spectrum of Mo on the worn surface lubricated by MACs + 0.5 wt.% Mo nanoparticles under vacuum condition

Grahic Jump Location
Fig. 9

The schematic of tribological mechanisms of nanoparticle additives

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In