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 the study of mechanical properties of short random oil palm fibre reinforced epoxy (OPF/epoxy) composites. Empty fruit bunch (EFB) was selected as the fibre and epoxy as the matrix. Composite plate with four different volume fractions of oil palm fibre was fabricated, (5 vol%, 10 vol%, 15 vol% and…
The problem of acoustic microstreaming that develops around a gas bubble in an ultrasound field is considered. It is shown that the solutions obtained previously by Wu and Du [(1997). J. Acoust. Soc. Am. 101, 1899-1907], which are based on the assumption that viscous effects are essential only within a thin boundary l…
We study jammed configurations of polydisperse colloidal hard spheres with a well-defined temperature (constant kinetic energy) as a function of compression speed and size polydispersity. To this end, we employ event-driven molecular-dynamics simulations at fixed temperature, using an algorithm that strictly prohibits…
The crystal and magnetic structure of BiFeO 3 have been studied with the use of high resolution neutron diffraction between 5 K and 300 K. The atomic coordinates in BiFeO 3 are almost unchanged between 5 K and 300 K.
A reactive interatomic bond-order potential for bcc tungsten is presented. Special attention in the potential development was given for obtaining accurate formation and migration energies for point defects, making the potential useful in atomic scale simulations of point and extended defects. The potential was used to…
Condition analysis of overhead power distribution system insulators using combined support vector machine (SVM) and wavelet multi-resolution analysis (MRA) seems to be promising for distribution system monitoring (DSM) automation to cope with the increasing system complexity. Though system well-being analysis for engi…
We present a lithography-free technique for fabrication of clean, high quality graphene devices. This technique is based on evaporation through hard Si shadow masks, and eliminates contaminants introduced by lithographical processes. We demonstrate that devices fabricated by this technique have significantly higher mo…
Reducing the thermal conductivity of nanowires may enhance their already exciting efficiency of thermoelectric energy conversion. Using molecular dynamics simulations, we demonstrate that the thermal conductivity of silicon nanowires could be significantly decreased by patterning (or etching) induced roughness of the…
We present a comprehensive study of the structural and electronic properties of ultrathin films containing graphene layers synthesized by chemical vapor deposition based surface segregation on polycrystalline Ni foils then transferred onto insulating SiO2/Si substrates. Films of size up to several mm's have been synth…
Treatment of diseases of the posterior segment of the eye, such as age-related macular degeneration, cytomegalovirus retinitis, diabetic retinopathy, posterior uveitis and retinitis pigmentosa, requires novel drug delivery systems that can overcome the many barriers for efficacious delivery of therapeutic drug concent…
The last decade has witnessed an unprecedented explosion in nanotechnology to take advantage of the unique physicochemical properties that emerge at the nanoscale including quantum effects. However, the excitement generated by new applications of nanotechnology in products has not been matched by a parallel appreciati…
Abstract Charoite, ideally (K,Sr,Ba,Mn) 15–16 (Ca,Na) 32 [(Si 70 (O,OH) 180 )](OH,F) 4.0 · n H 2 O, a rare mineral from the Murun massif in Yakutiya, Russia, was studied using high-resolution transmission electron microscopy, selected-area electron diffraction, X-ray spectroscopy, precession electron diffraction and t…
The role of osmolytes, and especially trehalose, in stabilizing proteins under stress conditions is now a widely accepted fact. The physical and chemical properties of trehalose, i.e., low chemical reactivity, nonreducing nature, high glass transition temperature, high affinity for water molecules, existence of a numb…
We perform a quantitative investigation of the energetics of thermally induced sp3→sp2 conversion of carbon-carbon bonds in tetrahedral amorphous carbon (ta-C) films by using near-edge x-ray absorption fine structure (NEXAFS) and Raman spectroscopy. We investigate the evolution of the bonding configuration in ta-C thi…
We present Raman spectra of numerous icosahedral boron-rich solids having the structure of α-rhombohedral, β-rhombohedral, α-tetragonal, β-tetragonal, YB66, orthorhombic or amorphous boron. The spectra were newly measured and, in some cases, compared with reported data and discussed. We emphasize the importance of a h…
In this work, we consider model fluids which are dispersions of clay particles in aqueous solutions of carboxymethyl cellulose. Their rheological properties are measured in both steady and oscillatory shear flows. We present the experimental results obtained for different polymer concentrations and for three different…
A review of rheological in situ measurement techniques applied to liquids and soft solids at high pressures of more than 100 MPa is presented. The instruments reported in the literature fall into four groups: concentric cylinder rheometers, falling body and rolling ball viscometers, capillary viscometers and oscillato…
دستیابی به مکانیزم تجزیه حرارتی پودر هیدراید تیتانیم، نقش مهمی در مراحل مختلف ساخت فومهای فلزی آلومینیمی، به ویژه تعیین مناسبترین شرایط عملیات حرارتی اولیه پودر، دارد. در این تحقیق نمودارهای STA پودر هیدراید تیتانیم، با سرعت حرارتدهی 10 درجه بر دقیقه در حضور گاز آرگون با خلوص 99/99%، و همچنین نمودارهای STA برای پود…
MTDATA، بسته نرم افزاری قدرتمندی برای محاسبۀ شرایط تعادلی و دیاگرامهای فازی است. این نرم افزار برای بررسی استحالههای فازی یا شبیه سازی فرآیندها قابل استفاده است که بستگی به نوع پایگاه دادههایی دارد که در اتصال با آنها می باشد. در این تحقیق نمودارهای فازی سیستم آهن- کربن- آلومینیوم- سیلیسیم (Fe-C-Al-Si) با به کار…
در این تحقیق فلز منیزیم برای اولین بار در کشور به روش احیای سیلیکوترمیک تحت خلأ از دولومیت تکلیس شده (دولومی) استخراج شده است. در این روش، مواد اولیه بعد از مخلوط شدن به صورت بریکت تبدیل شده و سیلیسیم موجود در فروسیلیس باعث احیای دولومی میشود. محصول واکنش احیا، منیزیم فلزی است که به صورت فاز گازی در کندانسور جمعآوری…