Materials Literature
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ABSTRACT Fracture behaviour of metastable austenitic stainless steels (Cr‐Ni grade 301 and low‐Ni high‐Mn grades 201 and 204Cu) that suffer of delayed cracking after deep drawing was examined. The phenomenon of delayed cracking is known to be related to the coexistence of internal hydrogen, strain‐induced α′‐martensit…
We report Raman scattering measurement of charge nematic fluctuations in the tetragonal phase of BaFe 2 As 2 and Sr(Fe 1-x Co x ) 2 As 2 (x=0.04) single crystals. In both systems, the observed nematic fluctuations are found to exhibit divergent Curie-Weiss like behavior with very similar characteristic temperature sca…
Abstract Double emulsions are valuable for the formation of multi‐compartmental structures. A variety of pathways to prepare double emulsions have been developed, but high‐throughput routes to droplets of controlled size and architecture remain scarce. A new single‐step process is introduced for preparation of water‐i…
Deep UV Raman spectroscopy is expected as a technique to evaluate diamond like carbon (DLC) because it observes sp3 bonds peak, called T-peak, and sp2 bonds, called G-peak, directly. To use the advantage of deep UV Raman spectroscopy, we show the evaluation of sp2 bonds rich DLC, called a-C:H, and several type of sp3…
Increase in continuous wave laser excitation (6 W/cm2 to 120 W/cm2) of colloidal PbS quantum dots in the strongly quantized regime (diameters 2.0 nm and 4.7 nm) deposited on semi-insulating GaAs and glass causes a clear blue shift (0.019 eV and 0.080 eV) of the emission spectra. Proof of the applicability of a dynamic…
We explore the transport properties of mixed ionic-electronic conductors made of carbon nanotube/RbAg4I5 film composite nanostructures in the presence of optical fields. The formation of ion-electron bound states (IEBSs) due to Coulomb interactions results in significant conductance decrease. The wavelength-dependent…
Staged combustion is a promising technology for gas turbines to achieve load flexibility and low NOx emission levels at the same time. Therefore, a large scale atmospheric test rig has been set up at the Institute of Thermodynamics, Technical University of Munich to study NOx emission characteristics of a reacting jet…
A new fossil diatom with a well-developed raphe-bearing keel and continuous junction line in the strongly bilobate wings is described as Entomoneis calixasini Paillès, Blanc-Valleron & Poulin sp. nov. This species was found at numerous levels within a 4.6-m-long core recovered from the north-western slope of the Centr…
ABSTRACT In order to reduce the environmental impact of the accumulation of synthetic polymer waste, especially in the case of products with a short shelf life, such as disposable diapers and sanitary napkins, this study evaluated the biodegradation of samples of polypropylene (PP) modified with an organic additive fr…
Nanoindentation is used to assess mechanical properties of ordered mesoporous titania thin films with pore sizes in the range of 8–16 nm. Estimates of strut properties are obtained under the standard scaling assumptions widely used in porous media. The inferred hardness and fracture toughness of individual struts are…
Honeycomb‐patterned porous films of poly(ether sulfone) (PES) are prepared via breath figures (BF), in which dichloromethane (DCM) is used as the solvent, although the solubility of PES in DCM is relatively low. It is found that the use of a DCM suspension of PES as the casting solution and the addition of an amphiphi…
An experimental campaign was carried out to study the passivity of steel embedded in Ordinary Portland mortar. Mockup samples made of steel coupons (roughly polished or pre-corroded) embedded in mortar were tested under a relative humidity of 80, 90 and 95% or in a solution simulating the ground water of the French si…
Excellent piezoelectric properties can be obtained near the polymorphic phase transition (PPT) region in (K, Na)NbO3 based piezoceramics. The enhanced piezoelectric properties resulted from the 18-fold spontaneous polarization directions caused by the coexistence of orthorhombic and tetragonal phases. In this study, t…
In this study, localised corrosion properties of the biomedical grade Ti–Nb–Cu alloy and AISI 316 austenitic stainless steel specimens were investigated. Ti–Nb–Cu alloy specimens were produced by powder metallurgy method. Nb was used for beta-phase Ti stabiliser. Beta-Ti phase has low Young’s modulus close to bone, hi…
The damping characteristics of Ti50Ni50−xCux (x = 0~30 at.%) shape memory alloys (SMAs) at a low frequency have been studied using a dynamic mechanical analyzer. The magnitude of the tan δ value and the values of the storage modulus (E0) softening/hardening and the strain variation exhibited in B2↔B19 transformation a…
A metalens, i.e., a dense array of identical resonators, allows to image an object pattern at subwavelength scale from far field radiation field. Here, we show that the efficiency can be improved when the resonant frequencies of the cell are distributed over a given frequency range. Because in such systems each eigen…
Radioactive Waste Management Limited (RWM), formerly the Radioactive Waste Management Directorate of the UK Nuclear Decommissioning Authority (NDA RWMD), has a continuing programme of research and development to support the safe disposal of radioactive wastes in a geological disposal facility (GDF). This paper describ…
Epitaxial (Ba1-xSrx)(Zr0.1Ti0.9)O3 (BSZT, x = 0 – 0.45) thin films were deposited on (LaAlO3)0.3(Sr2AlTaO6)0.35 (LSAT) substrates by pulsed laser deposition. The experimental results demonstrate that the structural, dielectric, and ferroelectric properties of the BSZT thin films were greatly dependent on the strontium…
Magnetic properties of graphite modified at the edges by KCl and exfoliated graphite in the form of twisted multilayered graphene (<4 layers) are analyzed to understand the evolution of magnetic behavior in the absence of any magnetic impurities. The mixed magnetism in multilayer graphene is deconvoluted using Low fie…
Deoxyribonucleic acid (DNA), an intrinsic intumescent flame retardant system, able to behave as a char-former, has been melt-blended with an ethylene vinyl acetate copolymer (EVA) at different concentrations (namely, 10, 15 and 20wt.-%). The thermal and fire stability of the obtained compounds has been thoroughly inve…