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Lubricants
Volume 7
Issue 2
10.3390/lubricants7020014
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Technical Note

Friction of Tungsten-Based Coatings of Steel under Sliding Contact †

by
Matthew David Marko
Naval Air Warfare Center Aircraft Division, Joint-Base McGuire-Dix-Lakehurst, Lakehurst, NJ 08733, USA
†
NAVAIR Public Release 2018-609 Distribution Statement A—“Approved for public release; distribution is unlimited”.
Lubricants 2019, 7(2), 14; https://doi.org/10.3390/lubricants7020014
Submission received: 6 December 2018 / Revised: 24 January 2019 / Accepted: 28 January 2019 / Published: 31 January 2019
(This article belongs to the Special Issue Adhesion, Friction and Lubrication of Viscoelastic Materials)
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Abstract

An investigation was made to determine the effects of tungsten surface coating on the coefficient of friction of sliding contact between lubricated steel surfaces. The four-ball test was modified, using a tungsten carbide ball bearing in the spindle to cause sliding contact onto three hard steel ball bearings coated with tungsten disulfide lamellar dry lubricant coating, with a coating of grease lubrication applied to the ball bearings. The coatings, loads, speed, and grease level were varied to best understand the impact of different conditions on the friction coefficient.
Keywords: lubrication; ball bearings; four-ball; tungsten carbide; grease; tungsten disulfide; coatings; surface treatment; friction lubrication; ball bearings; four-ball; tungsten carbide; grease; tungsten disulfide; coatings; surface treatment; friction

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MDPI and ACS Style

Marko, M.D. Friction of Tungsten-Based Coatings of Steel under Sliding Contact. Lubricants 2019, 7, 14. https://doi.org/10.3390/lubricants7020014

AMA Style

Marko MD. Friction of Tungsten-Based Coatings of Steel under Sliding Contact. Lubricants. 2019; 7(2):14. https://doi.org/10.3390/lubricants7020014

Chicago/Turabian Style

Marko, Matthew David. 2019. "Friction of Tungsten-Based Coatings of Steel under Sliding Contact" Lubricants 7, no. 2: 14. https://doi.org/10.3390/lubricants7020014

APA Style

Marko, M. D. (2019). Friction of Tungsten-Based Coatings of Steel under Sliding Contact. Lubricants, 7(2), 14. https://doi.org/10.3390/lubricants7020014

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