Results 51 to 60 of about 2,206 (227)

On the Friction and Wear Mechanisms of Electrified Steel Contacts in CO2: Unveiling the Role of Carbon‐Rich Tribofilms Under Dry Sliding Conditions

Advanced Materials Interfaces, EarlyView.
This study investigates friction and wear of AISI 52100 steel under dry sliding in CO2, air, and N2 atmospheres, with and without contact electrification. CO2 forms a stable carbon‐rich tribofilm that reduces friction by ∼30% and wear by ∼85%. High‐resolution TEM, EELS, and molecular dynamics reveal pressure‐dependent lubrication mechanisms, showing ...
Julio A. Cao‐Romero‐Gallegos, Seungjoo Lee, Cagatay Yelkarasi, Leonardo I. Farfan‐Cabrera, Ryuichi Okamoto, Hitoshi Washizu, Ali Erdemir   +6 more
wiley   +1 more source

Polymer spur gears behaviors under different loading conditions: A review

, 2017
The significance of polymer gears to transmit power and motion is increasing continuously due to their inherent characteristics. Polymer gears have established themselves as attractive alternatives to traditional metal gears in plethora applications ...
Prashant Kumar Singh, Akant Kumar Singh, null Siddhartha   +2 more
core   +1 more source

High cycle fatigue and wear behavior of ta-C and a-C:H coated PEEK polymer spur gears under dry contact conditions

Polymer Testing
Diamond-like carbon (DLC) coatings are under investigation as a potential solution for extending the service life of polymer gears. This study examines the fatigue and wear behavior of polyetheretherketone (PEEK) polymer gears coated with tetrahedral ...
Bor Mojškerc, Tanja Stiller, Aleš Durjava, Nikola Vukašinović   +3 more
doaj   +1 more source

TRIBOLOGICAL AND MECHANICAL PROPERTIES OF POLYMERIC COMPOSITES REINFORCED BY METALLIC FILLERS [PDF]

Journal of the Egyptian Society of Tribology, 2014
Polymer matrix composites (PMCs) filled with metals are widely studied to be used in industrial applications, such as gears, self-lubricated materials, sliding materials, flooring materials and brake lining materials.
R. A. Ibrahim, A. M. Samy
doaj   +1 more source

Study on Liquid Crystal-Polymer Gears.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 1995
Attention has been paid to liquid-crystal polymers (hereinafter called LCP) as plastics of the next generation since these have features of high rigidity and small thermal expansion coefficient in addition to excellent heat resistance. Accordingly, in industry, application of LCP to gear materials has been attempted, but at present, data for ...
Tsukamoto, Naohisa, Maruyama, Hiroki, Matsumoto, Toru   +2 more
openaire   +2 more sources

Fully 3D‐Printed Wave‐Wound Electromagnetic Motors

Advanced Materials Technologies, EarlyView.
This work presents the first fully 3D‐printed wave‐wound electromagnetic motors, which are created using conductive nanoparticle inks, carbon‐filled nylon polymers, and surface mount components. These motors can achieve a stall torque of 7.62N·mmA−1$7.62 \nobreakspace N{\cdot }mm A^{-1}$ and efficiency of 28.2 %, which approaches the performance of ...
Joseph Schwalbe, Sebastian Mettes, Eduardo Francke, Kenneth W. Allen, Yi Chen Mazumdar   +4 more
wiley   +1 more source

Upcycling Compact Discs Into Ultra‐Stable, Flexible, and Stretchable Nanoporous Gold Electrodes for Enhanced Biosensing Performance

Advanced Materials Technologies, EarlyView.
This article highlights the development of robust and high‐performance flexible and stretchable biosensors that maintain long‐term functionality and optimal electrical conductivity under mechanical deformation, utilizing sustainable and cost‐effective manufacturing principles.
Mousa H. Aldosari, Ahyeon Koh
wiley   +1 more source

Magnet-Sleeve-Sealed Mini Trochoidal-Gear Pump Prototype with Polymer Composite Gear [PDF]

Energies, 2017
The trochoidal-gear technology has been growing in groundbreaking fields. Forthcoming applications are demanding to this technology a step forward in the conceiving stage of positive displacement machines. The compendium of the qualities and the inherent characteristics of trochoidal-gear technology, especially towards the gerotor pump, together with ...
Gámez Montero, Pedro Javier, Antoniak, Piotr, Castilla López, Roberto, Freire Venegas, Francisco Javier, Krawczyk, Justyna, Stryczek, Jaroslaw, Codina Macià, Esteban   +6 more
openaire   +4 more sources

Effect of recycled powder and gear profile into the functionality of additive manufacturing polymer gears

Rapid Prototyping Journal, 2023
Purpose Polymer laser powder bed fusion (PBF-LB/P) is an additive manufacturing technology that is sustainable due to the possibility of recycling the powder multiple times and allowing the fabrication of gears without the aid of support structures and subsequent assembly.
Calignano, Flaviana, Bove, Alessandro, Mercurio, Vincenza, Marchiandi, Giovanni   +3 more
openaire   +2 more sources

Elastohydrodynamic Lubrication of Compliant Circular Contacts near Glass-Transition Temperature

Lubricants, 2022
Lubrication of polymer materials nowadays represents a subject of interest in many engineering applications, such as bearings or gears, to utilize them in the areas where conventional metal materials have so far dominated. However, material properties of
Jiri Krupka, Krystof Dockal, Ivan Krupka, Martin Hartl   +3 more
doaj   +1 more source