Materials Literature
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通过SEM中静载动态拉伸，原位观察和研究了搅拌铸造法制备的YAl2P／Mg-Li-Al基复合材料裂纹的萌生及扩展机制。结果表明，微裂纹萌生位置主要为复合材料的铸造缺陷处、复合材料的基体中以及颗粒／基体界面处，并以在复合材料基体中萌生为主。微裂纹的扩展主要在基体和YAl2颗粒／基体界面处进行。主裂纹的长大方向具有选择性，裂纹主要沿颗粒贫化区与颗粒富集区的交界处开裂，主裂纹扩展到一定程度后，试样全面失稳而迅速断裂。基体的断裂失效在YAl2P／Mg-Li-Al复合材料拉伸断裂过程中起很大作用。
在Thermecmastor-Z热模拟试验机上对0．045％Ti-0．003％C的Ti-IF钢进行700～950℃、应变0～0．7、应变速率1～70s^-1条件下的热模拟实验，以分析温度、应变速率和应变量对变形抗力的影响。用BP（back propagation）网络神经算法给出了Ti-IF钢在800～875℃变形抗力预报模型。通过对模型预报值和实验数据实测值的比较得出，变形抗力相对误差在4．0％以内。
The object of this thesis was devoted to study the crystal structure and electrical transport properties of Bismuth Selenid thin film. For this purpose, high purity Bi2Se3 is thermally evaporated from molybdenum boat in a vacum of 10-5 Torr, on to glass substitutes for structure and electrical transport measurements.…
采用溶胶-凝胶法合成Y（BO3，PO4）：Ce，Tb绿色荧光粉，利用热分析（TG—DTA）、X射线衍射仪（XRD）、扫描电子显微镜（SEM）、荧光分光光度计等手段探讨了（BO3，PO4）：Ce，Tb荧光粉的烧结条件、结构及荧光性能的关系．实验结果表明，烧结温度对产物的结构和荧光性能具有一定影响，在1050℃下、高温烧结2h的样品的荧光强度最好．与高温固相法相比，此法合成的（BO3，PO4）：Ce，Tb荧光粉具有较完善的晶体结构，较高的纯度，较小的颗粒尺寸，粒度分布均匀，且相对荧光强度更高．
Results of research of influence of heat treatment of ochre the thermal and physical characteristics of PKM on the basis of PEVD are resulted. It is shown, that introduction of filling agent renders essential change of thermal and physical properties of PKM. Heat treatment of ochre practically does not influence the g…
Polycrystalline sulfides of the PbXSn1-XS (0 ≤ X ≤ 0.25) alloys were synthesized by the direct fusion technique. The thin films of these materials were prepared by a hot wall deposition method on glass substrates at Tsub. = 240 - 300 oC and vacuum of about 10-5 Torr. The microstructures of the films were characterized…
以Mn（CH3COO）2·4H2O和Na2CO3为原料，通过sol-gel技术合成前驱体，在600℃焙烧前驱体得到一种新的无水层状α-Na0.67MnO2.26材料。用等离子体光谱、X射线衍射仪、扫描电镜、恒流充放电和循环伏安（CV）等对产物的结构、组成、形貌及电化学性能进行研究。结果表明：得到的样品为稳定的六方层状P2结构，且颗粒细小；该样品在充放电电流密度为25mA／g和电压为2．0～4．3V时，首次充电比容量为188mA·h／g，第2次放电比容量为176mA·h／g，充放电库仑效率高达94％；在电压为2.0～4.3V，电流密度为25，50，125和250mA／g充放电条件下，其第2次放电比容量分别为176，168，139和1…
A series of polydimethylsiloxane (PDMS) with varied molecular weights (M_w=3×10~6,1×10~6 and 0.5×10~6) were melt blended with PP to investigate the effect of PDMS molecular weight (MW) on the morphology and mechanical properties of PP/PDMS blends.Scanning electron microscopic (SEM) examination showed that the size of…
Interfacial chemistry and particle interactions of polydispersed chlorite clay dispersions as a function of pH and solution speciation have been investigated in the pH range 2-9 at 25 C. Particle zeta potential, reflecting interfacial chemistry indicates a strong pH history dependency. The electrokinetic zeta potentia…
This chapter contains sections titled: Ferromagnetic Thin Films Permanent-Magnet Materials Induced Magnetic Anisotropy Stress Anisotropy and Magnetostriction Stoner-Wohlfarth Theory Anisotropic Magnetoresistance Effect Giant Magnetoresistance Effect Exchange Coupling with Antiferromagnetic Films The Basic Spin Valve E…
Electrodeposition of copper are studied both in presence and absence of ultrasound at low temperatures (25°C, −2.5°C and −4°C). The deposits are analyzed and characterized by cyclic voltammetry (CV), chronoamperometry (CA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM).…
Phoenix
The temperature dependence of the thermal elastic of water solution NaCl for differences frequencies has been analyzed.
通过熔融共混法制备出不同硅烷偶联剂（KH550，KH560）改性的nano-ZnO/HDPE复合材料，并考察了偶联剂及ZnO含量对复合材料性能的影响。结果表明：改性nano-ZnO对HDPE基体起到了明显的增强增韧的效果。当改性nano-ZnO含量为0．2％～0．5％时，复合材料的力学性能量好。此外，nano-ZnO在HDPE中起异相成核剂的作用。从而使体系的熔融温度，结晶温度和结日度升高。经KH560处理的nano-ZnO／HDPE复合材料的力学性能和结晶性能均优于经KH550处理的nano-ZnO／HDPE复合材料的性能。
En emboutissage, le flan subit une expansion \n sous le poinçon et un rétreint sous le serre-flan. Du fait des variations d’épaisseur, \n le contact se concentre près de la périphérie du flan. Ce phénomène est analysé en \n emboutissage profond avec un modèle analytique (métal RPP avec anisotropie normale, \n frotteme…
采用高效液相色谱法，以KromasilC18（200mill×4．6ml／l，5um）为固定相，以甲醇＋水混合液（V（甲醇）：V（水）=700：300）为流动相，流速为0．6mL／min，柱温为35℃，检测波长为254nm，测得2-羟基-6-氯喹喔啉的变异系数为0．23％，平均回收率为99．69％。
Thesis (Master)--İzmir Institute of Technology, Chemistry, İzmir, 2009
Along with thinning of silicon substrate, the bowing of substrate and the reduction of short-circuit current density (Jsc) become serious for solar cell with Al paste printed rear side structure. To overcome these deficits, we applied silicon nitride rear side passivation structure and fine front electrode to thin mul…
Availability of secure, sustainable and competitive sources of energy is essential to economic growth, prosperity and quality of life in Europe. In view of the expected growth in demand for energy, of the increasing evidence of the climate change and the aim to ensure the security of energy supply in Europe further re…
Block copolymers have attracted extensive research activity in contemporary macromolecular science. This is attributable to a range of fascinating fundamental issues associated with understanding self-assembly processes in both solution and in bulk. One of the main issues on block copolymers requires further explorati…