Tribocorrosion behavior of new martensitic stainless steels in sodium chloride solution

The tribo-electrochemical behavior of two new martensitic stainless steels in a 3% NaCI solution has been investigated. Different electrochemical and surface analysis techniques (Scanning Electron Microscopy, Focused Ion Beam) were discussed to analyze the influence of the effect of the electrochemical conditions on friction and wear, and to elucidate involved wear mechanisms (plastic deformation, plastic shakedown and low-cycle fatigue). The selected stainless steels degrade through a delamination type of wear mechanism. The effects of the applied potential on wear are related to the formation of a passive film which alters the mechanical behavior of the surface and subsurface of the materials to promote wear. A coefficient of friction below 0.6 promotes nanowear, and a transition was observed when the coefficient of friction exceeded that value. (C) 2016 Elsevier B.V. All rights reserved.The authors would like to thank to BPI, Region Centre and Tours Plus for support of this research. This work is done under the project FUI 11 Mekinox.Dalmau Borrás, A.; Rmili, W.; Richard, C.; Igual Muñoz, AN. (2016). Tribocorrosion behavior of new martensitic stainless steels in sodium chloride solution. Wear. 368:146-155. doi:10.1016/j.wear.2016.09.002S14615536

Wearable smart sensor systems integrated on soft contact lenses for wireless ocular diagnostics

Wearable contact lenses which can monitor physiological parameters have attracted substantial interests due to the capability of direct detection of biomarkers contained in body fluids. However, previously reported contact lens sensors can only monitor a single analyte at a time. Furthermore, such ocular contact lenses generally obstruct the field of vision of the subject. Here, we developed a multifunctional contact lens sensor that alleviates some of these limitations since it was developed on an actual ocular contact lens. It was also designed to monitor glucose within tears, as well as intraocular pressure using the resistance and capacitance of the electronic device. Furthermore, in-vivo and in-vitro tests using a live rabbit and bovine eyeball demonstrated its reliable operation. Our developed contact lens sensor can measure the glucose level in tear fluid and intraocular pressure simultaneously but yet independently based on different electrical responses.ope

Dynamic Mechanical Properties and Thermal Effect of an Epoxy Resin Composite, Encapsulation’s Element of a New Electronic Component

International audienc

Design of Ultra Wideband Vivaldi Nanoantenna for Solar Energy Collection

International audienc

Study of mechanical properties of reverse osmosis membranes under operating conditions

International audienc

Simulated ageing of reverse osmosis (RO) membranes under operating conditions

International audienc

Capacitively Loaded Loop-Based Antennas with Reconfigurable Radiation Patterns

A class of metamaterial-inspired antennas having reconfigurable radiation patterns is proposed. They consist of a driven monopole antenna with one- and two-capacitively loaded loop (CLL), near field resonant parasitic elements. Two configurations are studied by considering the state of these CLL elements as being either open or closed configurations. Simulation results explain the design features and demonstrate that the structure can change its beam direction simply by controlling the switched states. Two prototypes with one- and two-CLL elements were fabricated and tested. The measured impedance mismatch and radiation pattern results are presented and compared to the corresponding simulated values