Materials Literature
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The delayed fracture characteristics of V-bearing steel were evaluated using the CSRT method, and the hydrogen trapping and de-trapping behavior was studied with the specimens hydrogen-charged and then held in air for up to 2.5 months.The CSRT tests were carried out at two test sites and nearly the same delayed fractu…
The random matrix theory has been used for analyzing vibrational spectra of amorphous solids. The random dynamical matrix M = AA T with nonnegative eigenvalues ɛ = ω2 has been investigated. The matrix A is an arbitrary square (N-by-N) real sparse random matrix with n nonzero elements in each row, mean values 〈A ij 〉 =…
Despite the large use of differential scanning calorimetry (DSC) technique in advanced polymer materials characterization, the new methodology called DSC in high heating rates was developed. The heating rate during conventional DSC experiments varying from 10 to 20°C.min-1, sample mass from 10 to 15mg and standard alu…
Hybrid inorganic–organic WOx–EDA nanobelts were prepared in a large scale by a mild solvothermal process. The nanobelts are ∼50 nm wide with lengths up to several tens of micrometres. A photoconduction device made of the resulting hybrid WOx–EDA nanobelts may have potential application as a photoswitch.
The microscopic dynamics and aging of a soft thermosensitive suspension were investigated by looking at the thermal fluctuations of tracers in the suspension. Below and above the glass transition the dense microgel particle suspension was found to develop heterogeneous dynamics, characterized by a non Gaussian Probabi…
Bispyridinium-phenylene-based conjugated donor–acceptor copolymers were synthesized by a Stille cross-coupling and cyclization sequence. These polyelectrolytes are freely soluble in organic solvents and display broad optical absorption bands that extend into the near-infrared region. They show ambipolar redox properti…
A particle reinforced composite material consisting of unsaturated polyester (UP) resin and fine dispersion of alumina trihydrate (ATH) has good mechanical properties. It performs well as laboratory or culinary bench top, in bathrooms as vanity top or sanitary ware, in maritime and agricultural applications. The goal…
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Growing attention has been devoted in the recent years to a class of metallamacrocycles known as metallacrowns (MCs). They are structural analogues of crown ethers where the methylene bridges have been substituted by coordinative bonds formed by a transition metal ion ("ring" metal) and a nitrogen atom. The cavity of…
A tensile strength of a coke picked from different distance away from coke oven wall was experimentally measured to investigate the effect of carbonization process by using the diametral-compression test. Changes of the microscopic structure of the coke picked from different distance away from coke oven wall were also…
A detailed electronic and microstructural characterization is reported for the LiBH4–MgH2 reactive hydride composite system with and without titanium isopropoxide as additive. Surface characterization by x-ray photoelectron spectroscopy combined to a morphological study by scanning electron microscopy as well as eleme…
Bio-inspired micro/nano-surfaces with novel anisotropic functionalities were obtained by utilizing the outward wings of grasshopper as a natural stamp. The two-step replica exhibited anisotropic high hydrophobicity and light reflection.
We report the synthesis of tetragonal β-In2S3 nanoparticles (NPs). The present approach is intended to produce volatile side products to achieve organic molecule-free NPs for better optoelectronic applications. The obtained NPs possess a bulk tetragonal structure with an average size of 8.08 ± 3.76 nm. The expected qu…
To study the thickness dependence of methanol diffusion into poly(methyl methacrylate) (PMMA) films, an experimental method based on optical reflectivity was proposed. The method can cover a thickness range from the micrometre down to the nanometre scale using a single set-up. Methanol molecules diffuse into PMMA foll…
We manipulate the interaction of Co’s 3d and Eu’s 4f electrons to design and fabricate ZnO:Co+Eu, which possesses intrinsic ferromagnetism at ambient temperature. The results show that the Eu ions tend to neighboring Co ions in order to eliminate the lattice distortion caused by the larger Eu ions via strain coupling.…
The selective oxidation of cyclohexene to 2-cyclohexene-1-ol and 2-cyclohexene-1-one has been investi-gated over Au/HNTs (HNTs: halloysite nanotubes) catalysts with molecular oxygen in a solvent-free system. The catalysts were prepared by deposition precipitation method and characterized by ICP-AES, TEM and XRD. The r…
Galvanic corrosion of a model Zn/steel couple was investigated in aqueous NaCl solutions by measuring open circuit potentials (OCPs), potential and current distributions, and galvanic currents. The OCP transient of the Zn/steel couple was divided into two stages. The first stage consisted of sacrificial dissolution of…
Porous mullite-bonded silicon carbide (SiC) ceramics were prepared from SiC and aluminum hydroxide [Al(OH)3] powders. The Al(OH)3 content was varied from 14.5 to 47.3 wt %, and porous SiC ceramics were fabricated via reaction sintering at 1450–1550°C for 2 h. The microstructure showed large SiC grains embedded in a ma…
The dimension and size of the building blocks as well as the preferential orientation, geometry and regularity of their assemblies are the most important key factors for fabricating thermoelectric materials with a high figure-of-merit (ZT) which is governed by the efficiencies in transporting electrical and thermal en…
In this paper, the structural and zeta potential properties of 10-hydroxycamptothecin (HCPT) were investigated by FT-IR and zeta potential analyzer under different pH. The anticancer drug HCPT as a model drug was used to prepare a high-performance and relatively easy-to-fabricate system on Fe(3)O(4) magnetite nanopart…