Synthesis of Bulk FeAl nanostructured materials by HVOF spray forming and Spark Plasma Sintering

The ANTARES optical module

The ANTARES collaboration is building a deep sea neutrino telescope in the Mediterranean Sea. This detector will cover a sensitive area of typically 0.1 km-squared and will be equipped with about 1000 optical modules. Each of these optical modules consists of a large area photomultiplier and its associated electronics housed in a pressure resistant glass sphere. The design of the ANTARES optical module, which is a key element of the detector, has been finalized following extensive R & D studies and is reviewed here in detail.

"Spark plasma synthesis from mechanically activated powders: a versatile route for producing dense nanostructured iron aluminides

Background light in potential sites for the ANTARES undersea neutrino telescope

The ANTARES collaboration has performed a series of {\em in situ} measurements to study the background light for a planned undersea neutrino telescope. Such background can be caused by $^{40}$K decays or by biological activity. We report on measurements at two sites in the Mediterranean Sea at depths of 2400~m and 2700~m, respectively. Three photomultiplier tubes were used to measure single counting rates and coincidence rates for pairs of tubes at various distances. The background rate is seen to consist of three components: a constant rate due to $^{40}$K decays, a continuum rate that varies on a time scale of several hours simultaneously over distances up to at least 40~m, and random bur…

Nano-SiC/CNT composites sintered by SPS: CNT amount effect on mechanical, thermal and electrical properties.

International audience

Mechanical alloying in the SHS research

Investigation of MAFAPAS processing parameters for producing dense nanostructured FeAl

"Mechanically activated process studied by XRD investigations in the Fe - Al binary system"

Influence of the microstructure on the durability of hard coatings obtained from metal powders

Study of the mechanism of the NbAl3 formation by MASHS reaction using synchrotron time-resolved XRD analyses coupled with IR observations

Bulk Nanostructured Materials Obtained by Powder Sintering

"In - situ resolved diffraction using synchrotron radiation : application to the study of the mechanically activated SHS reacton in the Fe - AL binary system"

Simultaneous synthesis and consolidation of nanostructured MoSi2

Mechanically activated powder Metallurgy Processing : a versatile way towards nanomaterials synthesis

Effect of energy parameters of ball milling on microstructure of Cu nanostructured powder

International audience; The microstructure evolution of Cu nanostructured powders at different conditions of the ball milling is investigated by the x-ray diffraction analysis. The characteristics of as-milled Cu-powder microstructure in terms of crystallite sizes, type, and density of dislocations as well as twin-faults' density are determined by the whole peak-profiles' modelling of powder x-ray diffraction pattern. By comparing of both microstructure characteristics of Cu powder and the ball milling parameters, the dominant factors of ball milling, which affect on the concentration of twin faults, type, and density of dislocations as well as the size of crystallites, are revealed.

"Study of Niobium Aluminide synthesis using MASHS and M2AP processes"

Comparison of European ICU patients in 2012 (ICON) versus 2002 (SOAP)

Purpose: To evaluate differences in the characteristics and outcomes of intensive care unit (ICU) patients over time. Methods: We reviewed all epidemiological data, including comorbidities, types and severity of organ failure, interventions, lengths of stay and outcome, for patients from the Sepsis Occurrence in Acutely ill Patients (SOAP) study, an observational study conducted in European intensive care units in 2002, and the Intensive Care Over Nations (ICON) audit, a survey of intensive care unit patients conducted in 2012. Results: We compared the 3147 patients from the SOAP study with the 4852 patients from the ICON audit admitted to intensive care units in the same countries as those…

The mechanically activated combustion reaction in the Fe-Si system : in situ time-resolved synchrotron investigation

Microstructure and electric properties of low-pressure plasma sprayed β-FeSi 2 based coatings

Abstract Thermoelectric material β-FeSi 2 based coating was fabricated by the technique low-pressure plasma spray (LPPS) on the Al 2 O 3 substrate from different alloy powders. During the process LPPS, the phase transformation had occurred through the peritectoid, eutectoid reaction and their inverse reaction. The grain size of the as-sprayed β-FeSi 2 doped Co coatings was reduced comparing with the original feedstock powders, which implied the thermal conductivity could effectively decreased by the LPPS process. The room temperature electrical conductivity showed metal and semiconductor properties on the as-sprayed and annealed coatings. This method and the results could solve the problems…

"In situ synchrotron charcterization of mechanically activated self - propagating high temperature synthesis applied in Mo - Si system

'Enhancement of self - sustaining reaction by mechanical activation : case of Fe - Si systeme"

Assessment of the worldwide burden of critical illness: The Intensive Care Over Nations (ICON) audit

Item does not contain fulltext BACKGROUND: Global epidemiological data regarding outcomes for patients in intensive care units (ICUs) are scarce, but are important in understanding the worldwide burden of critical illness. We, therefore, did an international audit of ICU patients worldwide and assessed variations between hospitals and countries in terms of ICU mortality. METHODS: 730 participating centres in 84 countries prospectively collected data on all adult (>16 years) patients admitted to their ICU between May 8 and May 18, 2012, except those admitted for fewer than 24 h for routine postoperative monitoring. Participation was voluntary. Data were collected daily for a maximum of 28 da…