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。
Nano-sized GdPO4:Eu3+ hierarchical hollow spheres were successfully synthesised through chemical conversion using Gd(OH)CO3:Eu3+ nanospheres as templates. The obtained hollow spheres were composed of primary nanowires. Based on the time-dependent experiments, the hollow shells were proposed to be formed through chemic…
Abstract The triple‐resonant (TR) second‐order Raman scattering mechanism in graphene is re‐examined. It is shown that the magnitude of the TR contribution to the photon‐G′ mode coupling function in graphene is one order of magnitude larger than the widely accepted two‐resonant coupling. Enhancement of the order of 10…
Segregation of solute atoms and vacancies to migrating D03–type antiphase boundaries (APBs) in Fe3Al of the stoichirometric and an Al-rich compositions has been investigated in detail by a phase-field method developed in the previous study [Koizumi et al. Acta Mater 2009;57:3039] focusing on the quantitative relations…
Photolysis of metalated (Cu and Ni) and free base 2-diazo-3-oxochlorins within a frozen matrix (λ = 457.9 nm, toluene, 80 K) generates a single photointermediate with a hypsochromically shifted electronic absorption spectrum relative to the starting diazochlorins. The appearance of ketene (~2131 cm(-1)) and azete (~16…
The measurement of the ultrasonic output power emission from transducers is a very important subject because strong ultrasonic power may be harmful to human health during medical diagnosis and therapy. Conventional techniques for measuring ultrasonic power such as radiation force balance method and calorimetry method…
Abstract Review: 55 refs.
The flash point is an important indicator of the flammability of a chemical. The minimum flash point behaviour (MFPB) is exhibited when the flash point of a mixture is below the flash points of the individual components. The identification of this behaviour is critical, because a hazardous situation results from takin…
Introduction Over the past decades, nanoclays have been widely used as additives to improve the strength as well as the fire performance of polymers, as evidenced by applications and a large number of studies reported in the literature. The mechanism of action of nanoclays is now relatively well understood, despite so…
Being an effective sintering enhancer boron is gaining relevance for obtaining high density PM steels. Thermodynamic calculations are an important tool for studying the roll of alloying elements in the formation of a liquid during sintering. In the present work, the system Fe-Cr-B was obtained by combining up to date…
미래 수소경제시대에 가장 효과적이고 안전한 수소공급방안으로 배관이 적용될 것으로 예측되는데, 우선 첫 단계에서는 기존 가스배관의 수소공급배관 적용 가능성을 평가하는 것이 필요하다. 또한 국내 천연가스배관에 수소가 일부 포함된 대체천연가스가 주입되는 기존 가스배관의 건전성에 미치는 영향을 파악해야만 한다. 수소가 포함된 천연가스를 공급하는 배관에서는 수소취성, 피로파괴, 수소누설 등에 대한 검토가 이루어져야 한다. 본 논문에서는 고압천연가스배관 건전성에 미치는 수소의 영향 평가 작업의 하나로서. 배관재료의 기계적 특성 변화에 미치는 수소의 영향을 거시적으로 평가하기…
A phase-field model is described for predicting the diffusional phase transformation process in elastically inhomogeneous polycrystals. The elastic interactions are incorporated by solving the mechanical equilibrium equation using the Fourier-spectral iterative-perturbation scheme taking into account elastic modulus i…
Bainite is an essential constituent in the microstructure of many advanced high strength steels, e.g. ferrite-bainite dual-phase, transformation induced-plasticity (TRIP) and complex phase (CP) steels. A complex thermo-mechanical processing is employed in industry such that following ferrite formation a desired fracti…
In this paper a rigid plastic mesh free method for slightly compressible materials is presented for the simulation of bulk metal forming processes. In this model MLS shape functions are used for the approximation of velocity field. These shape functions are defined in initial coordinates of particles. By using this me…
A uniform chromium-free conversion coating treated with an alkaline phosphate- permanganate solution was formed on the AZ 31 magnesium alloy. The effect of acid pickling on the morphology and on the corrosion resistance of the alkaline phosphate-permanganate conversion coating was investigated. The chemical compositio…
Introduction It has been reported that approximately 12 persons are killed and 120 are severely injured because of fire every day in Europe. Fire has considerable impact on the environment in terms of destruction of substructures and production of toxic and/or corrosive compounds such as CO, dioxins, HCN, and polycycl…
In this work, the complex investigation of structural and optical properties of zinc and cadmium selenide semiconductor films deposited by close-spaced vacuum sublimation method using thermal evaporation on non-oriented substrates was carried out. The structural and phase analyses of the layers condensed at different…
Thermal stress analysis of a thick-walled cylinder reinforced with functionally graded (FG) single-walled carbon nanotubes (SWCNTs) is considered in radial direction. Thick-walled cylinder is subjected to a thermal field. Two layouts of variations in the volume fraction of SWCNTs were considered in the composite cylin…
Abstract Nitrous oxide (N 2 O) is one of six greenhouse gases listed up in the Kyoto Protocol, and it effects a strong global warming because of its much greater global warming potential (GWP), by 310 times over a 100-year time horizon, than CO 2 . Although such N 2 O emissions from both natural and anthropogenic sour…
The orientational behavior of liquid crystals from homologous series of 4-cyanophenyl-4′-n-alkylbenzoate (CnH2n+1PhCOOPhCN) doped with dichroic dyes was investigated by means of optical spectroscopy methods: electronic absorption and fluorescence. The absorption and emission spectra of linearly polarized light were re…
An Fe-1.0C-17Cr (wt.%) stainless steel was subjected to subzero treatment to investigated the structure of martensite midrib. The midrib region appeared in the thin plate and lenticular martensites have been observed detailed by TEM. The TEM result reveals that the transformations of thin plate martensite and lenticul…