Awarded Research Theme List

Note: "Affiliation" in the table is based on the day of grant.
Click onto find the e-mail address of principal investigator. 

Grant Year Research Theme Principal Investigator,
Co-Investigator
(Country)
Research Content
Summary / Related Publication / Main Report
2015
First
Micro-scale Tribological Properties of Tribofilms Formed in Boundary Lubrication Assoc. Prof. Renguo Lu (Japan)

15A10
Ⅰ. Summary
Zinc dialkyl dithiophosphate (ZnDTP) and molybdenum dialkyl dithiocarbonate (MoDTC) form tribofilms at sliding interfaces and widely used as additives in automotive lubricants. The tribofilms are crucial for the management of wear and control of friction. In this research, the tribological failure of the tribofilms was studied by replacing the additive-containing oils with an additive-free oil during friction. The tribofilm generated from ZnDTP showed long duration while that from MoDTC was easily removed by friction. Friction coefficient distribution of a tribofilm was measured using a self-developed ball-on-disk friction tester. The friction distribution agreed well with the chemical images of the tribofilm, indicating that the friction depended on its chemical nature much more than the physical nature. By an in situ observation of tribofilm growth using a lateral force microscope (LFM), the formation of nano-stripped Mo-containing composites contributed to the low friction of the tribofilm while Zn-containing composites offered anti-wear properties when used with ZnDTP.
Ⅱ. Related Publication
(Researcher doesn't agree to disclose main report.)
15A10 Related Publication (HP).pdf
Affiliation of Principal Investigator:
Kansai University
Direct Measurement of Voltage-Controlled Friction between Graphene Sheets Prof. SUSAN PERKIN (UK)

14B02
Ⅰ. Summary
The direct control of friction and lubrication, using external parameters such as applied voltage, is highly desirable but not yet realized or well studied. With this project we implemented a technique, based on the Surface Force Balance, to measure surface forces including friction between two voltage-controlled surfaces across liquid films. The surfaces are graphene sheets, necessarily optically transparent to facilitate the interferometric measurement of liquid thickness down to nm resolution. The process for creating and transferring large area and smooth graphene sheets was improved and direct measurements of adhesion forces are reported. Electrical connections are set up and the voltage controlled experimnets are underway.

Ⅱ. Main Report
(including Related Publication)
14B02 Related Publication (HP).pdf
Affiliation of Principal Investigator:
University of Oxford
Effects of wear on superhydrophobic surfaces: experimental and theoretical investigation Prof. Michael Khonsari (USA)

14B09
Ⅰ. Summary
Recent years have witnessed an explosion of interest in a class of surfaces with superhydrophobic properties that enable the fluid droplets to roll off the surface, thereby exhibiting a self-cleaning property with remarkable industrial potential. One of the most important factors that influences this magnificent property is the surface roughness, a tribological parameter that is strongly affected by during the running-in period—an extremely complex process wherein the surface roughness changes drastically with time. In this research, we developed a fundamental analysis for determining the evolution of roughness and contact angle. The results involved extensive analysis of plastic deformation of asperities to realistically characterize the variation of surface finish during the transient and steady wear. The results were used in the Cellular Potts model (CPM) simulation to predict how the contact angle changes with time. The results were experimentally verified using a disk-on-disk tribometer and a contact angle measurement device.
Ⅱ. Related Publication
(Researcher doesn't agree to disclose main report.)
14B09 Related Publication (HP).pdf
Affiliation of Principal Investigator:
Louisiana State University
2015
Second
Verifications of EHD lubricant rheological models with in-situ local flow measurements Dr. Janet Wong (UK)

15B06
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Affiliation of Principal Investigator:
Imperial College London
Effect of lubricants on hydrogen embrittlement of steel Prof. Joichi Sugimura (Japan),
Dr. Monica Ratoi (UK)

15B10
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Affiliation of Principal Investigator:
Kyushu University