Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
This paper presents a vector model of magnetization based on the three-dimensional (3-D) Stoner-Wohlfarth elemental operator. To account for the magnetic interactions between particles, a phenomenological mean-field approximation is employed. The paper also illustrates the numerical simulation results of the magnetiza…
The magnetic absorption of electromagnetic waves by a small metallic particle of ellipsoidal form is investigated in frequency regions both higher and lower than the characteristic frequency of the free passage of an electron between walls of the particle. The boundary conditions chosen are diffuse reflection of the e…
In this paper we propose a fractal theory for the prediction of the time-effects on the damage evolution in cracking solids. By means of the Acoustic Emission (AE) technique, we have analysed the evolution of damage in several structures by an extensive experimental analysis in time. This technique permits to estimate…
Mixed sodium thio/oxo orthovanadates(V), dark red Na 3 [VS 3 O] and orange red Na 3 [VS 2 O 2 ], were synthesized via reactions in the melt starting from V, Na, Na 2 S, Na 2 O and sulfur. The structure of the low temperature phase of Na 3 [VS 3 O] (space group Pnma, a = 589.5(3), b = 962.8(5), c = 1186.6(6) pm, Z = 4,…
The description of algorithm to design in-pipe experimental ampoule devices (IPAD) is presented here, including description of IPAD design for irradiation tests of highly enriched lithium ceramics at WWR-K reactor. The description of the system for registration of tritium release from ceramics during irradiation is pr…
The formation and stability of the quasicrystalline icosahedral (i) phase in melt-spun Al93– x Fe3Cr2Ti2Si x (x = 0–5) ribbons are reported. Samples were characterized by X-ray diffraction, differential scanning calorimetry and transmission electron microscopy. Primitive (P-type) ordered i phase particles were found t…
Reactive synthesis by mechanical alloying and subsequent hot consolidation is an appropriate way to produce an Al‐Al 3 Ti‐Al 2 O 3 nanocomposite from readily available and inexpensive aluminium powder and nanosized TiO 2 . This processing route provides a fine grained and thermally stable microstructure with a control…
Despite the favourable strength and thermal stability, a disadvantage of the Mg-based alloys consists in a low ductility. Recently it has been demonstrated that ultra fine grained metals with grain size around 100 nm can be produced by high pressure torsion. A number of ultra fine grained metals exhibit favourable mec…
The system of magnesium and magnesium iodide can reduce some aromatic aldehydes and ketones to the corresponding pinacols in good yields within 10–60 min at room temperature under ultrasound irradiation.
In-plane orientation and annealing behavior of Rutile TiO 2 films grown on MgO (100) substrates by means of inductively coupled plasma-assisted sputtering were investigated. We deposited TiO 2 films on relatively low temperature (≦400°C) MgO substrates in Ar–O 2 mixture gases. Several films were annealed in atmospheri…
The dynamic behavior of transient gratings (TGs) formed in a planar-aligned azo-dye-doped liquid crystal film is investigated. The temporal profile of the diffraction efficiency of TGs reveals two components corresponding to the fast photoinduced isomerization of azo dye molecules and the slow dye-induced reorientatio…
The dependence of ductile-brittle transition temperature (DBTT) on tempering time and temperature was examined for a martensitic steel F82H irradiated at 150 and 250°C to a neutron dose of 1.9 dpa in the JMTR. The heat treatment was performed at 750 and 780°C for 0.5 h after the normalizing at 1040°C for 0.5 h. The te…
Blends of polyaniline (PAni) and poly(methyl methacrylate) (PMMA) have been produced using core‐shell particle synthesis, which is advantageous because it allows changing surface‐related properties of PMMA with relatively small amounts of PAni and without the use of organic solvents. Scanning electron microscopy (SEM)…
N-(2,4-Dichloro)-salicylaldimine was synthesized, characterized by elemental analysis, FT-IR, and UV-visible spectroscopy, and its crystal structure was determined. The title compound is almost planar and contains short intramolecular O-H. . .N hydrogen bonds [O1-N1 2.601(1) A° ]. It remains transparent in the visible…
The amorphous polymer surfaces of polystyrene (PS, M n=200 kg/mol, M w/M n=1.05) and poly(methyl methacrylate) (PMMA, M n=51.9 kg/mol, M w/M n≤1.07) were brought into contact at 21°C to form PS‐PS (for 54 days) and PMMA‐PMMA auto‐adhesive joints (for 11 days). After contact at that temperature corresponding to T g‐bul…
The effect of heat treatments at 1100°C on an ion-beam synthesis of Si nanocrystals in SiO 2 layers is studied. The ion-implanted samples are subjected either to a single heat treatment after the total ion dose (10 17 cm −2 has been implanted, two heat treatments (a heat treatment after the ion implantation of each ha…
Abstract This work is aimed at improving our knowledge of the Nb and Fe precipitation in the low α-temperature range as a function of Fe and Sn contents in ZrNb based alloys. Several experimental variants, with Nb contents ranging from 0.3–0.8 wt%, Fe from 0.01–0.5 wt% (and also Sn additions), have been studied, with…
Mg-wrought alloys recently became an engineer material of constantly increasing interest. The mechanical properties of extruded Mg-feedstock of the alloys AZ80 and AZ31 indicate their suitability for automotive applications in form of high-quality forgings. Therefore a detailed knowledge about the forming behaviour is…
The photochromic performance of polymer-dye conjugates was successfully tailored using the living radical polymerization technique ATRP. ATRP allowed the synthesis of photochromic dye-polymer conjugates consisting of polymer of defined chain length and polydispersity with a single photochromic dye attached at one end.…
Molecular modelling has been successfully used to interpret the effect of two molecules on the crystal growth of barium sulfate. The replacement energy was found to correlate with the degree of inhibition as determined from conductivity experiments. It was also able to predict the preferred barium sulfate face for add…