Study on the characterisation of the PTFE transfer film and the dimensional designing of surface texturing in a dry-lubricated bearing system

Research output: Contribution to journalArticlepeer-review

Standard

Study on the characterisation of the PTFE transfer film and the dimensional designing of surface texturing in a dry-lubricated bearing system. / Ding, Liang; Axinte, Dragos; Butler-Smith, Paul; Abdelhafeez Hassan, Ali.

In: Wear, Vol. 448-449, 203238, 15.05.2020.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Vancouver

Author

Bibtex

@article{f714a06f85fe45d183f22d32b9e2db45,
title = "Study on the characterisation of the PTFE transfer film and the dimensional designing of surface texturing in a dry-lubricated bearing system",
abstract = "The ability of polytetrafluoroethylene (PTFE) to form tribo-film in dry sliding condition makes it a popular liner material for self-maintenance bearings, such as those in the helicopter main and tail rotors. Nowadays, hard fillers or reinforcing-fibres are added to form the PTFE composite with enhanced strength and wear resistance; however, this also leads to increasing possibility of wear tracks on counter-surface and therefore more difficulty in observing and characterising the transfer film. In this paper, a surface analysis method based on using SEM analysis, supplemented with a Time-of-flight Secondary-ion mass spectrometry (Tof-SIMS) techniques for calibration was developed to give a comprehensive view of the transfer film formation on bearing steel surfaces. Previous challenges in transfer film identification and characterisation were also pinpointed. A series of laser surface textures (dimples), designed for improving the tribological performance of the bearing were tested, and the effects on transfer film formation have been evaluated by the surface analysis method. It is found that the depth of the dimples should match with the thickness of the transfer film to achieve a benefiting effect of the film formation, while the diameter and the coverage of the textures needs to be relatively small to avoid a high level of abrasion.",
keywords = "PTFE composite, Surface analysis, Surface texturing, Transfer film",
author = "Liang Ding and Dragos Axinte and Paul Butler-Smith and {Abdelhafeez Hassan}, Ali",
note = "Funding Information: Funding: This work was supported by SKF UK. Ltd and Marie Sk{\l}odowska-Curie actions (The Integration of Novel Aerospace Technologies “INNOVATIVE”, Grant No: 665468 ). The authors are grateful to the support provided, and particularly the technical advice from Mr. Michael Colton and Dr. Johnpaul Woodhead in SKF UK. Ltd. Publisher Copyright: {\textcopyright} 2020",
year = "2020",
month = may,
day = "15",
doi = "10.1016/j.wear.2020.203238",
language = "English",
volume = "448-449",
journal = "Wear",
issn = "0043-1648",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Study on the characterisation of the PTFE transfer film and the dimensional designing of surface texturing in a dry-lubricated bearing system

AU - Ding, Liang

AU - Axinte, Dragos

AU - Butler-Smith, Paul

AU - Abdelhafeez Hassan, Ali

N1 - Funding Information: Funding: This work was supported by SKF UK. Ltd and Marie Skłodowska-Curie actions (The Integration of Novel Aerospace Technologies “INNOVATIVE”, Grant No: 665468 ). The authors are grateful to the support provided, and particularly the technical advice from Mr. Michael Colton and Dr. Johnpaul Woodhead in SKF UK. Ltd. Publisher Copyright: © 2020

PY - 2020/5/15

Y1 - 2020/5/15

N2 - The ability of polytetrafluoroethylene (PTFE) to form tribo-film in dry sliding condition makes it a popular liner material for self-maintenance bearings, such as those in the helicopter main and tail rotors. Nowadays, hard fillers or reinforcing-fibres are added to form the PTFE composite with enhanced strength and wear resistance; however, this also leads to increasing possibility of wear tracks on counter-surface and therefore more difficulty in observing and characterising the transfer film. In this paper, a surface analysis method based on using SEM analysis, supplemented with a Time-of-flight Secondary-ion mass spectrometry (Tof-SIMS) techniques for calibration was developed to give a comprehensive view of the transfer film formation on bearing steel surfaces. Previous challenges in transfer film identification and characterisation were also pinpointed. A series of laser surface textures (dimples), designed for improving the tribological performance of the bearing were tested, and the effects on transfer film formation have been evaluated by the surface analysis method. It is found that the depth of the dimples should match with the thickness of the transfer film to achieve a benefiting effect of the film formation, while the diameter and the coverage of the textures needs to be relatively small to avoid a high level of abrasion.

AB - The ability of polytetrafluoroethylene (PTFE) to form tribo-film in dry sliding condition makes it a popular liner material for self-maintenance bearings, such as those in the helicopter main and tail rotors. Nowadays, hard fillers or reinforcing-fibres are added to form the PTFE composite with enhanced strength and wear resistance; however, this also leads to increasing possibility of wear tracks on counter-surface and therefore more difficulty in observing and characterising the transfer film. In this paper, a surface analysis method based on using SEM analysis, supplemented with a Time-of-flight Secondary-ion mass spectrometry (Tof-SIMS) techniques for calibration was developed to give a comprehensive view of the transfer film formation on bearing steel surfaces. Previous challenges in transfer film identification and characterisation were also pinpointed. A series of laser surface textures (dimples), designed for improving the tribological performance of the bearing were tested, and the effects on transfer film formation have been evaluated by the surface analysis method. It is found that the depth of the dimples should match with the thickness of the transfer film to achieve a benefiting effect of the film formation, while the diameter and the coverage of the textures needs to be relatively small to avoid a high level of abrasion.

KW - PTFE composite

KW - Surface analysis

KW - Surface texturing

KW - Transfer film

UR - http://www.scopus.com/inward/record.url?scp=85079610504&partnerID=8YFLogxK

U2 - 10.1016/j.wear.2020.203238

DO - 10.1016/j.wear.2020.203238

M3 - Article

AN - SCOPUS:85079610504

VL - 448-449

JO - Wear

JF - Wear

SN - 0043-1648

M1 - 203238

ER -