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Termomechanické vlastnosti hořčíkových slitin AZ91, AZ61 a AS31

A. Hanus、Petr Lichý2009-01-01DSpace VŠB-TUO (VŠB-TUO)

ABSTRAKT: Znalost relaxačních vlastností kovových materiálů za vysokých teplot je nezbytná pro ověřování náchylnosti odlitků na tvorbu defektů během výroby.Pomocí tahových zkoušek za vysokých teplot je možné zjistit teplotní rozsahy zkoušeného materiálu, ve kterých se generují nejvyšší hladiny pnutí.Vzniklá pnutí v od…

Natural Fiber Reinforced CompositesAdditive Manufacturing and 3D Printing Technologies

Самоорганизация и формирование низкоразмерных систем при удалении от равновесия

Олексій Віталійович Хоменко、Алексей Витальевич Хоменко、Oleksii Vitaliiovych Khomenko2009-01-01Electronic Sumy State University Institutional Repository (Sumy State University)

Дисертацію присвячено дослідженню моделей самоорганізації низьковимірних конденсованих систем, що базуються на самоузгоджених диференціальних рівняннях. Запропоновано синергетичну реологічну модель Лоренца, яка описує плавлення ультратонкої плівки мастила. Описано гістерезис, який виникає під час плавлення. З урахуван…

Material Properties and Failure MechanismsPowder Metallurgy Techniques and MaterialsDiverse Industrial Engineering Technologies

Processing of nanoparticle structures and composites : a collection of papers presented at the 2008 Materials Science and Technology Conference (MS&T08), October 5-9, 2008, Pittsburgh, Pennsylvania

Tom Hinklin、Kathy Lu2009-01-01Medical Entomology and Zoology

Introduction Nanoparticle-Based Bulk Material Templating Kathy Lu and Chase Hammond Controlling the Processing Parameters for Consolidation of Nanopowders into Bulk Nanostructured Material 11 A. Sadek and H. G. Salem Large-Scale (>1GM) Synthesis of Single Grain Two-Phase BaTi03-Mno,5Zno,5Fe204 Nano-Composites with Con…

Chemical and Physical Properties of MaterialsZeolite Catalysis and SynthesisCatalysis and Hydrodesulfurization Studies

介孔纳米γ-Al 2 O 3 的制备及其吸附性能

冯青琴、何军志2009-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

采用溶胶-凝胶法合成了介孔纳米γ-Al2O3,以透射电镜(TEM),X射线衍射(XRD)比表面测定(BET)等技术,对所得的介孔纳米γ-Al2O3进行了表征。考察了不同条件下制备的介孔纳米γ-Al2O3在静态吸附条件下对磷酸根离子的吸附性能。实验结果表明,选择1g/L的溴化十六烷基三甲铵作为分散剂,在pH=4.1、陈化48h、煅烧550℃、保温3h的条件下制备的介孔纳米γ-Al2O3的比表面为551.8m2/g,其对磷酸根离子的吸附性能较好。

Surface Modification and SuperhydrophobicityMinerals Flotation and Separation TechniquesNanocomposite Films for Food Packaging

Numerical Simulation on Oxidation Reaction of NO in Exhaust Gas by Pt Catalyst(Thermal Engineering)

Hiroyoshi Yane、Hiroshi Yamashita、Kazuhiro Yamamoto2009-01-01TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B

A high emphasis is placed on disposal of exhaust gas from diesel engines, because of an increasing concern about pollution of the atmosphere. Honeycomb supported catalytic agents is commonly used for NO oxidation into NO_2, which is adopted to develop continuously DPF system. However, the measurement of NO and NO_2 co…

Catalysis and Oxidation ReactionsIndustrial Gas Emission ControlCatalytic Processes in Materials Science

A first principles study of the thermodynamics of phase separating systems -The examples RhPd and AlZn-

Jimmy Johansson2009-01-01KTH Publication Database DiVA (KTH Royal Institute of Technology)

A screened GPM approach in an EMTO-CPA framework was investigated in order to study its ability of describing transition temperatures in phase separating systems, i. e. systems giving either a random or a cluster structure depending on the temperature and the relative concentration of the ingoing atoms of the binary a…

Metallurgical and Alloy Processesnanoparticles nucleation surface interactionsThermodynamic and Structural Properties of Metals and Alloys

Interactions of Functional Groups with Surfaces

Ingeborg-Helene Svenum2009-01-01OpenAlex

The adsorption of atoms and molecules is a key step in a wide range of technologically important areas including catalysis, adhesion, corrosion, electrochemistry and microelectronics. Investigations of well-defined systems can contribute to better understanding of processes within these areas. This thesis presents stu…

Chemical and Physical Properties of Materialsnanoparticles nucleation surface interactionsAdvanced Chemical Physics Studies

Technologies for producing microcapsules with added value

S.N. Rodrigues、Isabel M. Martins、Vera G. Mata 等 5 位作者2009-01-01Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT)

Two technologies were studied to produce microcapsules for different application. Interfacial polymerization was applied to produce polyurethane urea (PUU) microcapsules with limonene oil for textile application and coacervation was applied to produce polylactide (PLA) microcapsules with thyme oil for cosmetics applic…

Polymer composites and self-healingEssential Oils and Antimicrobial ActivityOlfactory and Sensory Function Studies

The effect of rework on brittle fractures in lead free solder joints : The growth of intermetallic compounds during rework and its effects

Elin Dornerus2009-01-01KTH Publication Database DiVA (KTH Royal Institute of Technology)

Saab Microwave Systems, SMW is a supplier of radar systems. The circuit boards that are operating in their radars have components which solder joints contains lead. However, the EU directive RoHs and WEEE are causing SMW to prepare for a transition to lead free solder joints. The objective of this thesis is to gain de…

Aluminum Alloys Composites PropertiesMetallurgical and Alloy ProcessesElectronic Packaging and Soldering Technologies

Properties of Polystyrene/Organoclay Composites Prepared by Melt Compounding Using a Twin-screw Extruder; Poly (styrene-co-vinyloxazoline)-based Masterbatch Approach

Terumasa Koyama、Shuichi Tanoue、Shinji Minami 等 5 位作者2009-01-01Seikei-Kakou

二軸押出機を用いた溶融混練法によりポリスチレン/有機変性クレー系複合体の作製を試みた．本研究では，作製した複合体の特性に及ぼすオキサゾリン変性ポリスチレンを主成分としたマスターバッチを用いたマスターバッチプロセスの効果について，引張試験，X線回折測定，TEM観察及びDSC測定から検討した．その結果，マスターバッチ作製における有機変性クレーの含有率が20wt％において，初期弾性率とガラス転移温度が最大を示した．このことから，ポリスチレン/有機変性クレーを作製する際，マスターバッチ内における最適なクレーの含有量が存在すると考えられる．加えて，複合体の初期弾性率とガラス転移温度は，粘度の高いポリスチレンを用いたとき，より高い値を示した．

Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesPolymer Nanocomposites and Properties

PA1212-b-PEG嵌段共聚物的合成与表征

霍丽、赵清香、王玉东 等 6 位作者2009-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

以双端羧基尼龙1212和双端氨基聚乙二醇制备了尼龙1212（PA1212）-b-聚乙二醇（PEG）嵌段共聚物，用红外分析（FT-IR）和核磁共振（1H-NMR）确定了PA1212-b-PEG的结构，用1H-NMR确定了产物的分子量，并测试了材料的力学性能。结果表明，PA1212-b-PEG的断裂伸长率比尼龙1212有了明显提高。与以羟基封端的聚醚作为软段制备的嵌段共聚物相比，聚合反应可以在较低的真空度下进行，聚合温度和时间有所降低和缩短，聚合过程无需使用催化剂，得到的嵌段共聚物分子量有所提高，且具有较高的拉伸强度和弯曲强度。

Covalent Organic Framework ApplicationsHydrogels: synthesis, properties, applicationsConducting polymers and applications

四环素-Ca^2＋-CTMAB三元配合物体系荧光光谱的研究与应用

张红漫、顾铭燕、黄金恋 等 4 位作者2009-01-01分析试验室

研究了Ca^2＋和阳离子表面活性剂㈣B对四环素（TC）的荧光增敏作用，提出了一种利用Ca^2＋-TC—CTMAB三元配合物协同增敏体系来测定TC含量的新方法。在Ca^2＋、CTMAB及1℃共存体系中，由于三元配合物的生成使，I℃的荧光强度急剧增加，其荧光强度与rI℃浓度在8．0×10^-9-1．0×10^-5mol／L范围内具有良好的线性关系，方法检出限为5．97×10^-9mol／L。该法用于TC片剂、尿液及牛奶中残留TC的测定，加标回收率为82．4％～98．3％。同时对TC在不同介质中的荧光增敏作用机理进行了初步探讨。

Photochemistry and Electron Transfer StudiesForensic Fingerprint Detection MethodsLuminescence and Fluorescent Materials

FEATURES OF FREQUENCY CHARACTERISTICS OF NORMAL WAVES IN HYDROACOUSTIC WAVEGUIDE

O. R. Lastovenko、V. A. Lisyutin、A. A. Yaroshenko2009-01-01Electronic Sumy State University Institutional Repository (Sumy State University)

We consider the isovelocity hydroacoustic waveguide with a bottom composed of a liquid intermediate layer and a half-space. Damping in a layer and a half-space is taken into account. Critical modes frequencies subject to the layer depth are determined. Frequency characteristics of the wave numbers, the modulus and the…

Advanced Materials and Semiconductor TechnologiesHeat Transfer and Numerical MethodsRocket and propulsion systems research

Preparation of the calcium malate with shells.

Pan RongKai、Wen Jian、Lin Lili 等 4 位作者2009-01-01Xiandai shipin keji

Using one-step calcinations methods, the process conditions of calcium malate preparation with shells were studied. Single factor test and orthogonal test showed that the result showed that the best process conditions were as follows: adding1.4g shell ash into 20mL 0.10 g/mL DL-malic acid at the reaction temperature 6…

Industrial Technology and Control SystemsCrystallization and Solubility Studies

B216 COMBUSTION CHARACTERISTICS OF A SINGLE AQUEOUS GLYCERIN SOLUTION DROPLET(Combustion-8)

Tomohiko Furuhata、Takashi Saito、Masahiro Saito 等 4 位作者2009-01-01The Proceedings of the International Conference on Power Engineering (ICOPE)

Evaporation and combustion characteristics of a single aqueous glycerin solution droplet suspended in an electric furnace were investigated as a fundamental study for spray combustion of glycerin. The furnace temperature was changed between 280℃ to 900℃. Diameter of suspended droplet was around 2.6mm. Effects of furna…

Rocket and propulsion systems researchAdvanced Combustion Engine TechnologiesCatalytic Processes in Materials Science

Synthesis and characterization of nano-structured CoSb3 thermoelectric material

Abdullah Khan2009-01-01KTH Publication Database DiVA (KTH Royal Institute of Technology)

In this project, nano powder of CoSb3 thermoelectric material was synthesized using chemical alloying novel co-precipitation method. This method involved co-precipitation of TE precursor compounds in controlled pH aqueous solutions followed by thermo-chemical treatments including calcination and reduction to produce n…

Thermodynamic and Structural Properties of Metals and AlloysAdvanced Thermoelectric Materials and Devices

Sondes luminescentes à base de lanthanides solubles dans l'eau

Pascal Kadjane2009-01-01Serveur des thèses de l'Université de Strasbourg (University of Strasbourg)

La tres forte sensibilite des methodes analytiques basees sur la fluorescence a conduit au developpement de nouveaux marqueurs fluorescents pour l’analyse et l’imagerie biologique. Cependant, l’utilisation de ces marqueurs est limitee par des problemes d’autofluorescence des milieux biologiques et de diffraction de lu…

Radioactive element chemistry and processingLanthanide and Transition Metal ComplexesPolyoxometalates: Synthesis and Applications

OS0204 Evaluation of Viscoelastic Characteristics of Polymeric Materials by using Indentation Technique

Kenichi SAKAUE、Shimpei Okazaki、Takeshi OGAWA2009-01-01The Proceedings of the Materials and Mechanics Conference

Indentation technique was applied to evaluate the viscoelastic characteristic of a polymeric material. In the present study, load controlled indentation test with a Berkovich indenter was performed on Polypropylene (PP). The results showed that the measured penetration depth exhibits typical creep behavior of viscoela…

Polymer crystallization and propertiesSynthesis and properties of polymersTribology and Wear Analysis

（0．96Bi0．5Na0．5TiO3—0.04BaTiO3）-（0．98K0．5Na0.5NbO3—0．02LiTaO3）无铅压电陶瓷的结构分析与性能研究

戴叶婧、张孝文2009-01-01稀有金属材料与工程

研究了（1-x）（0．96Bi0．5Na0．5TiO3-0.04BaTiO3）-x（0．98K0．5Na0.5NbO3-0．02LiTaO3）（BNTBT-KNNLT）体系在0≤x≤0．07这一组分区域的结构和性能。X射线衍射谱发现，这一系列组分在室温下形成纯钙钛矿型固溶体，没有其他杂相产生。（111）峰的峰位和峰形随组分的变化有规律的变化。随着KNNLT组分的加入，压电及介电等性能有比较明显的改变。压电性能随KNNLT的加入出现最大值。当x=0．02时，压电常数d33=125pC／N。介电常数在室温下随组分的增加而增加。电滞回线的结果显示，尽管在BNTBT中掺杂了KNNLT，这一系列的压电陶瓷仍然具有较大的矫顽场。当x=0．02…

Multiferroics and related materialsFerroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics Synthesis