Browsing Faculty of Engineering by Author "Gyimah, G. K."

Now showing items 1-9 of 9

Analysis of electrochemical machining-textured surfaces under point contacts in rolling tribo-test.

Gyimah, G. K.; Oman, E. K.; Nyanor, P.; Acakpovi, A.; Jiang, S.; Guo, Z.; Barber, G. C. (Springer, Cham., 2021)

Purpose: The need for the right textured surface and selecting the right material in tribology is critical to friction reduction and energy savings in machine elements under full film lubrication rolling point contacts. ...
Application of powder metallurgy methods for production of a novel Cu-based composite frictional train brake material.

Gyimah, G. K.; Guo, Z.; Huang, P.; Chen, D. (Powder metallurgy-fundamentals and case studies, 2017)

A novel Cu-based composite frictional train brake material composed of several elements such as Al, SiO2, Fe, graphite, Sn, Mn and SiO2 re-enforced with other elements was treated under Powder Metallurgy (P/M) route. The ...
Improvers of pressure-viscosity coefficients of two-phase liquid-solid lubricants.

Gyimah, G. K.; Guo, Z. N.; Huang, P.; Jiang, S. Z.; Barber, G. C.; Liu, G. X.; Liu, J. W. (2016)

The prediction of the pressure-viscosity coefficient, α, is one of the most important properties for Elastohydrodynamic lubrication (EHL) condition; thereby, the need for improvers to aid its measurement and performance ...
Influence of MoS2 and PTFE in oil film characteristics and tribological performance in EHL point contacts.

Gyimah, G. K.; Guo, Z.; Huang, P.; Jiang, S.; Barber, G. C.; Liu, J. (Tribology-Materials, Surfaces & Interfaces, 2019)

The use of improvers of viscosity index mixed with engine oil to enhance film thickness of lubricant, have been tribologically studied by the optical interferometry technique. The viscosity index improvers (PTFE and MoS2) ...
Investigation of pulse electrochemical sawing machining of micro-inner annular groove on metallic tube

Liu, G. X.; Zhang, Y. J.; Jiang, S. Z.; Liu, J. W.; Gyimah, G. K.; Luo, H. P. (International Journal of Machine Tools and Manufacture, 2016)

Pulse electrochemical sawing micro-machining (PECSM) is a non-conventional process. Having features of no tool wear, no cutting force, and good surface quality, this process is suitable for machining micro-grooves on the ...
Oil film characterization of PTFE during EHL point contact and pure rolling tribology tests.

Gyimah, G. K.; Jiang, S.; Acakpovi, A.; Oman, E. K.; Nyanor, P.; Barber, G. C. (IEEE, 2021)

A polymer additive blended with commercial engine oil to have enhanced film-forming ability has been developed and studied using optical interferometry. An experimental study was carried out on the impact of polymer additives ...
Preparation of biomimetic superhydrophobic surface by a facile one-step pulse electrodeposition.

Jiang, S.; Guo, Z.; Gyimah, G. K.; Zhang, C.; Liu, G. (Procedia Cirp, 2018)

Superhydrophobic surfaces in natural world, such as lotus leaves, are commonly attributed to a combination of hierarchical micro/nano structures and low surface energy materials, giving inspiration for the preparation of ...
PTFE and MoS2 Additives for Mineral Oil Film Formation in EHL Point Contacts.

Gyimah, G. K.; Guo, Z.; Huang, P.; Jiang, S.; Barber, G. C. (ASME, 2016)

Lubricant film-forming viscosity index improvers blended with commercial engine oil have been developed and studied by using optical interferometry. The influence of the viscosity index improvers (PTFE and MoS2) mixed with ...
A rapid one-step process for fabrication of biomimetic superhydrophobic surfaces by pulse electrodeposition.

Jiang, S.; Guo, Z.; Liu, G.; Gyimah, G. K.; Li, X.; Dong, H (Materials, 2017)

Inspired by some typical plants such as lotus leaves, superhydrophobic surfaces are commonly prepared by a combination of low surface energy materials and hierarchical micro/nano structures. In this work, superhydrophobic ...

Browsing Faculty of Engineering by Author "Gyimah, G. K."

Browsing Faculty of Engineering by Author "Gyimah, G. K."

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