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Now showing items 11-20 of 28
Undercut tolerances in industry from a fracture mechanic perspective
(EDP Sciences, 2018-05)
Fatigue is an important damage mechanism that particularly affects welded components, since they are likely to present residual stresses, inhomogeneities and stress raisers. Assessment of cyclic load effects on welds has ...
Au nanoparticles embedded in mesoporous ZrO2 films: Multifunctional materials for electrochemical detection
(Elsevier Science SA, 2018-01)
Multifunctional electrodes that combine the adsorption capacity of mesoporous oxides and the electrocatalytic activity of metallic nanoparticles (NPs) were designed, synthesized and tested for As (III) determination in ...
Mesoporous Nitrogen-Rich Carbon Materials as Catalysts for the Oxygen Reduction Reaction in Alkaline Solution
(Wiley VCH Verlag, 2012-04-16)
ORR MNC, FTW! Mesoporous nitrogen‐rich carbon (MNC) materials are synthesized by using polymer‐loaded SBA‐15 pyrolyzed at different temperatures. The activity and stability of the catalysts in the oxygen reduction reaction ...
Estimation of the plain high-cycle fatigue propagation resistance in steels
(Universidade Federal de São Carlos, 2002-12)
In this work a method to estimate the high cyclic fatigue propagation life of steel specimens under constant loading is presented. This method is based in experimental evidence that the fatigue limit represents the threshold ...
Ultrasonic crack evaluation by phase coherence processing and TFM and its application to online monitoring in fatigue tests
(Elsevier, 2017-10)
This work proposes a new ultrasonic imaging method for crack evaluation with arrays, and investigates its application to online monitoring of crack propagation in fatigue tests. The Total Focusing Method (TFM) is used to ...
Lithium dual uptake anode materials: crystalline Fe3O4 nanoparticles supported over graphite for lithium-ion batteries
(Pergamon-Elsevier Science Ltd, 2017-12)
Graphite, the usual anode material for current technology of lithium ion batteries (LIB), has great advantages and its processing is widely known and industrially feasible. For improving the anode's capacity, recent research ...
Damaging micromechanisms in an as cast ferritic and a ferritized ductile cast iron
(Elsevier Science, 2017-03-15)
Mechanical behavior and damaging micromechanisms in Ductile Cast Irons (DCIs) are strongly effected by matrix microstructure (e.g., phases volume fraction, grains size and grain distribution) and graphite nodules morphology ...
Development and characterisation of self-assembled graphene hydrogel-based anodes for bioelectrochemical systems
(Royal Society of Chemistry, 2018-08)
In this work, we report a simple and scalable method to produce high efficiency 3D graphene-based electrodes (GH) for bioelectrochemical systems. GH were obtained by self-assembly of graphene oxide, through slow reduction ...
Electrochemical performance of Mo doped high voltage spinel cathode material for lithium-ion battery
(Elsevier, 2018-02)
This article deals with the properties of high-voltage cathode material LiNi0.5Mn1.5O4 synthesized by a solid-state reaction method and the influence of doping this material by molybdenum. The samples – LiMox+ yNi0.5 - ...
Electroanalysis using modified hierarchical nanoporous carbon materials
(Royal Society of Chemistry, 2013)
The role of the electrode nanoporosity in electroanalytical processes is discussed and specific phenomena (slow double layer charging, local pH effects) which can be present in porous electrode are described. Hierarchical ...