Materials Literature
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J-R curves under continuous hydrogen charge were obtained to evaluate the effect of absorbed hydrogen on fracture toughness of low alloy steel. The effect of absorbed hydrogen, loading rate and tempering temperature were investigated. J_ under continuous hydrogen charge condition drastically decreased in the case of v…
SANTRAUKA Darbo tikslas. Įvertinti pacientų, kuriems atliekami rentgeno diagnostikos tyrimai, informuotumą apie radiacinę saugą. Metodika. Tyrimo objektas – pacientų, kuriems atliekami rentgeno diagnostikos tyrimai, informuotumas apie radiacinę saugą. Tyrimo metodai: mokslinės literatūros analizė, anoniminė anketinė a…
In the first section, it introduces a methodology to simulate the currents and fields during an air discharge ESD into a product by combining a linear description of the behavior of the DUT with a non-linear arc resistance equation. The most commonly used test standard IEC 61000-4-2 requires using contact mode dischar…
结构的进化和 hydrogenated 硅的光描述( Si : H )频率( RF )血浆提高了的常规无线电获得的薄电影通过 silane 的分解的化学蒸汽免职( PECVD )与氩冲淡了被X光检查 diffractometry ( XRD )学习， Fourier 变换红外线( FTIR )光谱学，拉曼光谱学，传播电子显微镜学( TEM )，并且紫外、可见(紫外力)光谱学分别地。薄电影的光性质上的氩冲淡的影响也被学习。当冲淡气体在 Si 在 nano 水晶谷物和非结晶的网络的生长起一个重要作用，它被发现那氩: H 薄电影。有不同的氩冲淡比率的薄电影的结构的进化被观察，氩血浆在免职过程期间在薄电影导致 nanocrystalliz…
status: Published
表面改質工程係在工具表面披覆上一層另類的材料，以達到提昇其機械性質、抗氧化、抗腐蝕與耐磨耗行為表現的新穎科技。近年來，由於氮化物硬質鍍膜具備了上述幾項優異的特性，已被廣泛使用在各種工業領域，諸如切削刀具保護層與手機、筆記型電腦等3C產品的裝飾鍍層等。本研究先選擇氮化鉻與氮化鎢兩種硬質鍍膜，藉由調變濺鍍擋板開關時間，製備出具不同層狀週期值之氮化鉻/氮化鎢奈米多層硬質薄膜。當層狀週期值控制在8奈米時，此一奈米多層薄膜的硬度可達到29.1 GPa，較原先二元氮化物薄膜有較優異的機械性質表現。由微結構觀察中可發現，氮化鉻/氮化鎢奈米多層膜較二元氮化鉻薄膜具有較緻密的結構，故在抗磨耗的研究中也具有較佳的表現。 然而，二元氮化鉻薄膜之微硬度僅…
epsilon-MnO2 nanoparticles were synthesized through a single step solution combustion process without using any template or surfactants. Plate-like epsilon-MnO2 Materials, 50-150 nm in diameter and 20-25 nm in thickness, were obtained at a higher Mn(NO3)(2):C2H5NO2 molar ratio (i.e., 2:1), whereas spherical epsilon-Mn…
用高温熔融法制备了Tm3+/Ho3+/Yb3+共掺碲酸盐玻璃,在TeO2-ZnO-La2O3玻璃组分的基础上,引入声子能量较低的PbO,研究了PbO对基质样品拉曼光谱以及Tm3+/Ho3+/Yb3+共掺样品上转换发光光谱的影响。结果表明,随着PbO含量的增加,样品的最大声子能量下降比较明显,同时样品的声子态密度也有减小趋势;在975nm波长激光二极管(LD)激励下,随着PbO含量的增加,Tm3+/Ho3+/Yb3+共掺样品上转换蓝光(480nm)、绿光(546nm)和红光(662nm)的发光强度都有明显增强,且PbO的引入对上转换蓝光发光强度的影响要大于其对绿光和红光的影响。
We used the first principles theory to calculate the dielectric properties of the materials. In first principle calculation, we used” density-functional perturbation theory” and “linear response method” to simplify the simulation process. We first used diamond as model materials to test the accuracy of calculation. Af…
In this paper, the fuel that will be irradiated in the IFA-716 experiment of the OECD Halden Reactor Project programme was further characterised by EPMA and XRD. By EPMA, the amount of chromium dissolved in the UO2 matrix was estimated and a value of 964 ppm was found. This value is consitent with literature values. A…
In this paper we report the comparative study of superconductivity by 3d (Co), 4d (Rh), 5d (Ir) element doping in SmFeAsO. X-ray di. raction patterns indicate that the material has formed the ZrCuSiAs-type structure with a space group P4/nmm. It is found that the antiferromagnetic spin-density-wave (SDW) order in the…
We have fabricated an instrument designed to couple both the imaging process in scanning electron microscopy and the precise positioning of scanning probe microscopy. This microscope is comprised of a metallic field emitter that generates an electron beam with a minimal impingement diameter of approximately one nanome…
Рассмотрено современное состояние исследований по разработке гетерогенных катализаторов на основе металлоорганических каркасных структур (metal organic frameworks, MOFs) и их применению в различных процессах. Особое внимание уделяется реакциям, связанным с селективным катализом. Показано, что в этой области металлоорг…
Ag-sheathed SmFeAsO0.7F0.3-delta (Sm-1111) superconducting wires were prepared by a one-step solid state reaction at temperatures as low as 850-900 degrees C, instead of commonly used temperatures of 1150-1250 degrees C. The x-ray diffraction pattern of the as-sintered samples is well indexed on the basis of the tetra…
status: Published
Dielectric barrier discharge (DBD) is proved to be an effective method for surface treatment of polymers over the past 20 years and is now widely used in the fields of surface modification.In this paper, surface treatment of polyethylene terephthalate (PET) films for improving the hydrophilicity using DBD excited by u…
A high-energy density hybrid capacitor has been designed in organic electrolyte using commercial grades of metal oxide and activated carbon for negative and positive electrode, respectively. Different approaches have been explored for assembling the hybrid capacitor in order to achieve an optimum ratio between the ene…
Efficient energy transfer at room temperature from Tm3+ to Pr3+ has been demonstrated in co-doped KPb2Cl5. Because of the low phonon energies in KPb2Cl5, the energy transfer processes result in the conversion of 805 nm laser diode pump energy to a broad band of mid-IR radiation between 3500to5500 nm. Energy transfer p…
edition: Second edition
ABSTRACT Possible avenues for cost reduction of crystalline silicon photovoltaics are reviewed. Driving forces in this process are the use of less grams of Si per Wp and the reduction of the manufacturing cost. A possible crystalline Si PV roadmap as viewed by IMEC is discussed. Two important developments are treated…