NDLI: On Stress-Induced Tribochemical Reaction Rates

Content Provider	Springer Nature Link
Author	Tysoe, Wilfred
Copyright Year	2017
Abstract	A number of recent experiments have demonstrated that normal and shear stresses are able to accelerate the rates of chemical reactions of adsorbates on surfaces, yielding an approximately exponential increase in reaction rate with force. It seems that such mechanochemical reactions play a central role in tribochemistry and the consequent formation of anti-wear or friction-reducing films from lubricant additives. It is thus appropriate to summarize the theories that can be used to analyse such tribochemical data. The models have a strong parallel with those used to analyse sliding friction, the Prandtl/Tomlinson model. It is found that the force-dependent activation barrier for chemical reactions varies as $$E_{\text{act}} (F) = E_{\text{act}} + AF + BF^{2}$$ . The linear variation in activation barrier with force, the so-called Bell equation, and the quadratic dependence, the so-called Hammond effect, are analysed using model reaction energy profiles, which reveal a dependence of the parameters A and B on the shape of the energy profile. The influence of contact pressure and sliding velocity is also discussed. The above models assume that the normal and shear stresses are coplanar with the thermal reaction coordinate for the tribochemical processes, and the effects of this not being the case are also discussed. Finally, the existing results of tribochemical reactions of oxygen-functionalized graphene and zinc dialkyl dithiophosphates are also analysed using these models.
Starting Page	1
Ending Page	16
Page Count	16
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	65
Issue Number	2
e-ISSN	15732711
Language	English
Publisher	Springer US
Publisher Date	2017-03-09
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Tribochemistry Bell model Extended-Bell model Hammond effect Oxygen-functionalized graphene Zinc dialkyl dithiophosphates (ZDDP) Tribology, Corrosion and Coatings Surfaces and Interfaces, Thin Films Theoretical and Applied Mechanics Physical Chemistry Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Topography and nanomechanical properties of tribochemical films derived from zinc dialkyl and diaryl dithiophosphates

On the Mechanism of ZDDP Antiwear Film Formation

A Semi-deterministic Wear Model Considering the Effect of Zinc Dialkyl Dithiophosphate Tribofilm

A dual‐analysis approach in tribochemistry: application to ZDDP/calcium borate additive interactions

ZDDP and MoDTC interactions and their effect on tribological performance – tribofilm characteristics and its evolution

Antiwear Chemistry of ZDDP: Coupling Classical MD and Tight-Binding Quantum Chemical MD Methods (TB-QCMD)

Film thickness and roughness of ZDDP antiwear films

Zinc Dialkyl Phosphate (ZP) as an Anti-Wear Additive: Comparison with ZDDP

Structural Changes in Tribo-Stressed Zinc Polyphosphates

On Stress-Induced Tribochemical Reaction Rates

Similar Documents

Topography and nanomechanical properties of tribochemical films derived from zinc dialkyl and diaryl dithiophosphates

On the Mechanism of ZDDP Antiwear Film Formation

A Semi-deterministic Wear Model Considering the Effect of Zinc Dialkyl Dithiophosphate Tribofilm

A dual‐analysis approach in tribochemistry: application to ZDDP/calcium borate additive interactions

ZDDP and MoDTC interactions and their effect on tribological performance – tribofilm characteristics and its evolution

Antiwear Chemistry of ZDDP: Coupling Classical MD and Tight-Binding Quantum Chemical MD Methods (TB-QCMD)

Film thickness and roughness of ZDDP antiwear films

Zinc Dialkyl Phosphate (ZP) as an Anti-Wear Additive: Comparison with ZDDP

Structural Changes in Tribo-Stressed Zinc Polyphosphates

On Stress-Induced Tribochemical Reaction Rates