NDLI: A Possible Link Between Macroscopic Wear and Temperature Dependent Friction Behaviors of MoS$

Content Provider	Springer Nature Link
Author	Hamilton, Matthew A. Alvarez, Luis A. Mauntler, Nathan A. Argibay, Nicolas Colbert, Rachel Burris, David L. Muratore, Chris Voevodin, Andrey A. Perry, Scott S. Sawyer, W. Gregory
Copyright Year	2008
Abstract	Studies to explore the nature of friction, and in particular thermally activated friction in macroscopic tribology, have lead to a series of experiments on thin coatings of molybdenum disulfide. Coatings of predominately molybdenum disulfide were selected for these experiments; five different coatings were used: MoS$_{2}$/Ni, MoS$_{2}$/Ti, MoS$_{2}$/Sb$_{2}$O$_{3}$, MoS$_{2}$/C/Sb$_{2}$O$_{3}$, and MoS$_{2}$/Au/Sb$_{2}$O$_{3}$. The temperatures were varied over a range from −80 °C to 180 °C. The friction coefficients tended to increase with decreasing temperature. Activation energies were estimated to be between 2 and 10 kJ/mol from data fitting with an Arrhenius function. Subsequent room temperature wear rate measurements of these films under dry nitrogen conditions at ambient temperature demonstrated that the steady-state wear behavior of these coatings varied dramatically over a range of K = 7 × 10$^{−6}$ to 2 × 10$^{−8}$ mm$^{3}$/(Nm). It was further shown that an inverse relationship between wear rate and the sensitivity of friction coefficient with temperature exists. The highest wear-rate coatings showed nearly athermal friction behavior, while the most wear resistant coatings showed thermally activated behavior. Finally, it is hypothesized that thermally activated behavior in macroscopic tribology is reserved for systems with stable interfaces and ultra-low wear, and athermal behavior is characteristic to systems experiencing gross wear.
Starting Page	91
Ending Page	98
Page Count	8
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	32
Issue Number	2
e-ISSN	15732711
Language	English
Publisher	Springer US
Publisher Date	2008-10-21
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Solid lubrication Molybdenum disulfide Wear Cryotribology Nanotechnology Physical Chemistry Theoretical and Applied Mechanics Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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