Materials Literature
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In this work, we investigate the structural properties of Ge quantum dot lattices in amorphous silica matrix, prepared by low-temperature magnetron sputtering deposition of (Ge+SiO2)/SiO2 multilayers. The dependence of quantum dot shape, size, separation, and arrangement type on the Ge-rich (Ge + SiO2) layer thickness…
Rare materials collected by individuals, in the past and in our own time, when given to research libraries become important public assets that, as cultural heritage collections, lend distinction to the institutions that receive them and benefit education and scholarship enormously. What motivates collectors to become…
This paper presents some research results of the application of finite element method and molecular dynamics in the simulation of grinding surface creation. The comparison of these two methods shows that both methods could illustrate the material removal phenomena and provide useful information of grinding mechanics,…
En el presente artculo se estudia el comportamiento de la corrosin de la aleacin de magnesio AZ31-B en ambiente marino simulado, modificada mediante el proceso de friccin-agitacin (PFA), con el fin de determinar el efecto de las variables del proceso, velocidad de rotacin y velocidad de avance. Se llevaron a cabo anli…
The infrared tunable diode laser absorption spectroscopy (IR-TDLAS) experimental technique was employed to study CF radical kinetics in pulsed capacitively coupled CF 4 /H 2 rf plasmas. In particular, the special data acquisition approach (so-called 'burst mode') was adapted and applied to monitor the absolute number…
Basing the foundation on the cutting experiments of 2.25Cr-1Mo-0.25V steel which is the material of hydrogenated cylindrical shell, the dynamic mechanical characteristics of the excessively heavy-duty cutting were analyzed. Then through researching the influence that the dynamic mechanical characteristics had on tools…
The particle size analysis (PSA) by laser diffraction (LD) method can be used for monitor or control of particulate process, because it has the advantages of shorter measurement time and good repeatability, and a variety of commercial instruments is available. However particle size distribution (PSD) measured by LD me…
A reaction of aqueous zinc acetate with 1,10-phenanthroline produces the ionic complex [(Phen) 2 Zn(OOCMe)](OOCMe) · 5H 2 O. A similar reaction of “anhydrous zinc acetate” [Zn 7 (μ 4 -O) 2 (μ-OOCMe) 10 ][η-OC(Me)OHNEt 3 ] 2 in benzene yields a precipitate, which is recrystallized from acetonitrile into trinuclear (Phe…
This study focuses on the cause of deviation of Poisson area scaling trend used for IMD-TDDB reliability of Cu/ULK (k=2.55) process. The effects of test structure, such as the serpent-comb and comb-comb structure, on IMD-TDDB reliability are comprehensively investigated with a simple resistance model to illustrate vol…
Grain growth in nanocrystalline Ni has been simulated by molecular dynamics. The simulations show the creation of a high density of twin boundaries during the growth as well as the formation of vacancies consistent with recent experimental observations. The growth follows parabolic kinetics with the diameter increasin…
The electronic structure of the (Zn, Co)O diluted magnetic semiconductors (DMSs) were investigated theoretically from first principles, using the fully relativistic Dirac linear muffin-tin orbital band structure method. The electronic structure was obtained with the local spin-density approximation. The x-ray absorpti…
In this work, the influence of hydrogen on magnetic properties of R2(Fe,M)17 (R = Ce, Lu, Y; M= Fe, Mn, Si, Cr, Ni) compounds is reported. Special attention is given to the compounds with Ce, because Ce ions might be in a mixed-valence state. Measurements of the temperature dependence of magnetization in weak magnetic…
In this article, a new process was used to make flame resistant polyacrylonitrile (PAN) fibers by surface modification. The effects of the treating conditions during the copper ion treatment, aqueous mixture of hydrazine hydrate treatment and high temperature treatment on the mechanical properties and flammability of…
A method has been developed for processing spectra of multiple small-angle neutron scattering (MSANS) to obtain information about substance heterogeneities, namely, their size and concentration. A method has been proposed for constructing the dependence of the MSANS line width on the sample thickness starting from the…
A study has been made of the evolution of the microstructures and textures in three kinds of low-carbon steel sheets (MAFE, BH and IF) having well developed <111>//ND texture that were rolled by low reductions and annealed at 780 °C in Ar atmosphere. The steel sheets developed different microstructures and textures, e…
Slide gates are installed at the bottom of a ladle or tundish to control the flow of molten steel. It plays an important role in ladle refining process and continuous casting. Al2O3-ZrO2-C refractories are widely used as slide gate materials due to its excellent corrosion and thermal shock resistance. At the start of…
The effect of the shape of filler particles on the mechanical properties of a composite material based on ultrahigh-molecular-weight polyethylene produced by thermal compacting after preliminary mechanical activation of the initial materials is studied. As a filler, Al 2 O 3 in the form of an ultradispersed powder wit…
Phosphate glasses containing fixed concentration of rare-earth with and without metallic nanoparticles (NPs) having compositions (59.5-x) P2O5-MgO-xAgCl-0.5Er2O3, where 0 ≤ x ≤ 1.5 mol% was prepared using melt-quenching technique. Spectral characterizations were made using UV-VIS-IR spectroscopy and photoluminescence…
This paper addresses use of coarse-grained mesoscale model to look at angle dependencies in an epoxy-copper (I) oxide interface in order to understand roughness effects on adhesion. The parameterization of the coarse-grained beads were previously parameterized from the molecular level [1–3] for the same polymer and co…
Silk sericin, a gumming protein from silk cocoons, has been a considerable natural protein-based biopolymer for fabrication of desired constructs for potential tissue engineering applications. This study investigated the formulation of a novel biopolymeric silk sericin/poly (vinyl alcohol) film with genipin as crossli…