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。
In recent years, -conjugated oligomers have emerged as ideal organic semiconductors for various electronic and optoelectronic applications, thanks to the possibility to modulate their electronic and optical properties (charge and exciton transport, light absorption and emission, response to external stimuli), which d…
Tesis Doctoral leida en la Universidad Rey Juan Carlos de Madrid en 2017. Directores de la Tesis: Pilar Rodrigo Herrero y Maria Dolores Escalera Rodriguez
Alloys of transition metals often possess superior catalytic properties than their pure components. Finding new alloy catalysts with predictable and desirable catalytic properties is the major challenge in multicomponent catalyst design due to the need to perform many catalyst preparations, characterizations and react…
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2017.
Lanthanum manganites are perovskite related materials known in particular for their colossal magnetoresistance (CM) properties.Manganite compositions showing CM behavior are mixed cation compounds such as (Ca x La 1-x ) MnO 3, which contain Mn ions in mixed Mn 3+ and Mn 4+ oxidation states.The goal of this project was…
Passive systems are embedded into the nuclear technology safety and design. In relation to safety, accumulators are one example of vital passive systems strictly needed to mitigate consequences of Large Break LOCA. In relation to design, the configurations of both PWR and BWR primary system is based on natural circula…
Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.
Oxide dispersion strengthened steels are candidate materials for structural constituents in IV generation fission nuclear reactors and for fusion nuclear reactors. A reduced activation nano-oxide strengthened ferritic steel is produced by mechanical alloying with an average grain size of 400 nm. The steel is produced…
A scanning transmission x-ray microscopy (STXM) based methodology is introduced for determining the dimensions (shell thickness, core and total diameter) of core-shell nanoparticles which exhibit a strong x-ray absorption contrast and a well-defined interface between core and shell material. A low radiation dosage dur…
Colemanite, CaB3O4(OH)3*H2O, is one of the most important mineral commodities for the extraction of boron. Despite a recent interest on its potential applications in ceramic processes, very few was known on the behavior of the colemanite crystal structure at non-ambient conditions of temperature and pressure. An in si…
Our research team applied surface modification processes to alloy steel to improve its corrosion and wear resistance, especially in seawater. The processes included fine powder intrusion, post processing, carburizing and zinc coating. Two different kinds of powder, Cr and Mo, were used for powder intrusion. After the…
Abstract not provided.
The Urea-SCR system is responsible for reducing the engine-out NOx using NH3, which is injected into the system as Diesel Exhaust Fluid or DEF. An optimum amount of DEF needs to be injected into the system to maximize the NOx reduction and minimize the NH3 slip. Since the amount of NH3 stored into the catalyst is an i…
© 2017 Dr. Simone Calvello
Bonded composite repairs of metallic aircraft structures were evaluated experimentally. Metal surface treatments for structural bonding were tested to assess their performance in aluminium, titanium, and stainless-steel epoxy bonding. Cracked aluminium plates were repaired with composite reinforcements to evaluate the…
In this work, we will focus on the working principle of chemoresistive gas sensors based on nano-crystalline metal-oxides. We addressed the problem of band bending and Schottky barrier formation in metal-oxide sensors and considered the possibility of oxygen in- and out-diffusion in a thermionic-emission conduction mo…
Nationally Recognized Testing Laboratories (NRTLs) are independent third-party organizations recognized by the Occupational Safety & Health Administration (OSHA) to provide evaluation, testing and certification of products. All NRTLs conduct testing and certification are based on safety standards developed by organiza…
3d Transtion metal i.e. Copper (II) Complexes of the general composition [CuL]X2 (where X = NO3−, 1/2SO4−2 and L1=2, 8, 14.20.25, 26, 27, 28] octaaza Pentacyclo [19.3.11, 21.13, 7.19, 13.115, 19] octacosa [1(25), 2, 7, 9(27), 10, 12, 14, 19, 21, 23] decaene, L2 = 2, 6, 12, 16, 21, 22 hexaaza tricyclo [15.3.11, 17.111,…
The mechanical and dynamic behaviors of Epoxy/MWCNTs and Epoxy/Al2O3 nanocomposites were investigated in this study. Tensile and impact properties were measured for the two nanocomposites. Free vibration test was applied to measure frequency responses and damping factors. The results showed a reduction in the mechanic…
摘要： 残余应力是制约物理气相沉积（Physical vapor deposition，PVD）硬质薄膜厚度的关键因素。采用多弧离子镀技术在高速钢基体上制备了厚度从3.7 m到15.5 m的TiN薄膜，结合曲率法和有限元法研究残余应力及结合性能随膜厚的变化规律。结果表明，随着膜厚的增加，基片弯曲程度加剧，而薄膜平均残余应力降低；膜层内残余应力的整体水平决定了界面切应力大小，薄膜结合性能随界面切应力的增加而降低。增加基体偏压、降低工作气压均导致薄膜内部残余应力的升高。当残余压应力较高时，TiN薄膜具有细小、致密的柱状晶结构，并呈现（111）择优取向，薄膜硬度及断裂韧度较高，耐磨性能良好。研究结果提示我们，通过残余应力的调控可提高硬质…