Materials Literature
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采用熔盐电沉积法在W、Mo、Re基体表面分别制备了Ir涂层,通过扫描电镜和能谱分析了涂层的形貌和成分,对比研究了W、Mo、Re在熔盐电沉积Ir涂层过程中的性质。结果表明：W和Mo在氯化物熔盐体系中腐蚀严重,电沉积后在基体和涂层之间形成了含有腐蚀产物的夹盐层,大大降低了涂层和基体之间的结合力,在热应力和外力的作用下涂层易产生裂纹和剥落。Re在氯化物熔盐体系中稳定性好,在氯化物熔盐体系中不发生腐蚀,电沉积后在基体和涂层之间无夹盐层形成,基体和涂层结合良好,电沉积所得Ir涂层致密、完整,没有裂纹和孔洞等缺陷。
In this paper is examined effect of stress corrosion on mechanical properties of material of used catalytic tube of reformer (reforming furnace) of fire-resistant austenitic carbide alloy HK 40. Results of laboratory mechanical tests showed that micro-structural condition of material of the tube with austenitic base i…
采用磁控溅射方法分别在聚酰亚胺基体以及单晶硅基体上制备恒定调制比（η）以及恒定调制周期（λ）的Cu-Cr纳米金属多层膜;通过单轴拉伸试验以及纳米压痕试验系统研究Cu-Cr多层膜屈服强度及硬度的尺度依赖性。微观分析结果表明：基体对多层膜的微观结构无影响,Cu-Cr多层膜在生长方向上均呈现Kurdjumov-Sachs取向关系,即{111}Cu//{110}Cr和-110-Cu//-111-Cr。力学测试结果表明：调制比恒定的Cu-Cr多层膜的屈服强度及硬度随调制周期的缩短而增加;调制周期恒定的Cu-Cr多层膜的屈服强度/硬度随调制比的增加而增加。Cu-Cr多层膜变形机制在临界调制周期（λc≈25 nm）和临界调制比（ηc≈1）由Cu…
ZnSe•0.5(N¬2H4) nanocrystals with various morphologies including nanowires, nanobelts and nanosheets were successfully prepared with a hydrothermal synthetic approach. It was found that the ratio of N2H4 to H2O employed in synthesis played an important role in nanocrystal growth, affecting the resultant composition an…
Time resolved in situ UV-vis absorption spectroscopy on growing ZnO quantum dots: Correlation to steady state fluorescence and x-ray diffraction measurements
The characteristics of NOx reduction in O2/CO2 combustion were investigated experimentally and numerically. Experiments showed that the exhaust CO concentration in O2/CO2 combustion was almost twice as much as that in air combustion. This was because high CO2 concentration enhanced the reaction (CO2 + H → CO + OH). A…
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biological Engineering, 2011.
利用分离式霍普金森压杆（SHPB）装置在3900s-1应变率条件下对Ti-6Al-4V合金进行动态加载,获得完全分离的断裂试样。使用扫描电子显微镜对试样的断裂特征进行观察。结果表明：试样中出现绝热剪切断裂,试样断口上交替分布着两个不同特征的典型区域（韧窝区及平滑区）。其中,韧窝区由微孔洞形核、长大并最终连接形成,表现出韧性断裂特征。在平滑区观察到超细晶粒（UFGs）,且晶粒间可观察到微裂纹,说明平滑区由微裂纹沿晶界扩展形成,表现出脆性断裂特征。由此可知,Ti-6Al-4V合金在动态加载过程中沿绝热剪切带发生的断裂失效过程不均匀,韧性及脆性两种断裂模式的共同作用导致该合金样品的最终断裂。
In the article the authors present results of calculations methods and experimental investigation of formation of microstructure and properties of ultra high molecular weight polyethylene (UHMWE), which is modified with ceramics А12О3 stock of different dispersivity and method of obtaining.
Living organisms produce crystalline structures called biogenic crystals or biominerals, of various shapes and properties. Among them, mechanical properties, such as resistance to stress or elasticity, are often far from those of the corresponding species typically crystallized in the laboratory. For example, the fabr…
Proyek Akhir ini bertujuan untuk mengetahui kualitas paving block dengan bahan serbuk alumunium sebagai bahan tambah, ditinjau dari kuat tekan, penyerapan air, dan pengujian tampak luar, serta penentuan komposisi terbaik dari keempat komposisi. Proyek Akhir ini menggunakan metode eksperimen dengan teknik uji laborator…
制备了Ziegler—Natta／茂金属（Z—M）复合催化剂，用Z—M复合催化剂采用一段丙烯本体均聚合、二段乙烯-丙烯气相共聚合制备了聚丙烯（PP）釜内合金PPc—A。与采用传统Ziegler—Natta催化剂ZN118制备的抗冲聚丙烯釜内合金SP179对比，两合金具有相近的熔体流动速率及乙烯含量，但冲击强度相差较大。对两合金试样进行了选择性溶解及扫描电子显微镜观察，结果表明：PPc—A的乙丙无规共聚物质量分数较SP179多2％左右，同时，PPc—A的橡胶相颗粒（刻蚀后孔数量）比SP179多，橡胶相的平均尺寸约为1μm，远低于SP179试样的2μm。
Бекетов Дмитрий Аскольдович. Кандидат технических наук, доцент кафедры электрохимических производств, Уральский федеральный университет имени первого Президента России Б.Н. Ельцина. Область научных интересов – композиционные материалы и покрытия высокотемпературного назначения. 620002, г. Екатеринбург, ул. Мира, 19, У…
抗菌性，生物忌避性，さらには難燃性を付与したシリカナノ粒子の調製について検討した。抗菌性シリカは粒子表面へホスホニウム塩基含有ポリマーをグラフトすることにより行った。抗菌性シリカを添加した樹脂や塗料は黄色ブドウ球菌や大腸菌に対して強力な抗菌性を示した。得られた複合体は，固定化しない抗菌性ポリマーを添加した樹脂とは異なり，24時間煮沸した後でも抗菌性を保持していた。さらに，生物忌避性のカプサイシン（Cap）を固定化したシリカは粘膜に対する刺激性を保持していたが，生物忌避性は小さかった。そこで，Capの層状複水酸化物（LDH）へのインターカレートについて検討した。その結果，CapをインターカレートしたLDHを添加したシリコーンゴムはフ…
Mathematical models of controlled object by control action and generating filter of disturbances for a control system of a nonrigid shafts form with lathing designed in the article.
Tese de doutoramento. Engenharia Electrotecnica e de Computadores. Universidade do Porto. Faculdade de Engenharia. 2011
For determining of limitary deformations for planar constructions reinforced with curvelinear trajectories the resolving equations are obtained for orthotropic non-homogeneous linear elasticity problem. A variety of orthogonal systems oriented reinforcement structures is obtained by isogonal trajectories designing for…
介绍了对由丙烯酸酯橡胶（ACM）和丁腈橡胶（NBR）组成的并用胶硫化特性和力学性能的研究。将单一橡胶的硫化体系组合起来对并用胶进行硫化。与单一橡胶成分相比,并用胶具有更优异的拉伸性能,表明了硫化体系的协同效应。并用胶的动态力学性能分析（DMA）显示tanδ波峰加宽,这表明在大多数所研究的体系中NBR相玻璃化转变时ACM相玻璃化温度有所变化,贮能模量增加（贮能模量也能表示协同效应）。SEM（扫描式电子显微镜）显微图显示出橡胶相很少,这也证实了它们具有良好的相容性。
The prospect of using transition metals as primary dopants in ABO3-type perovskite high-temperature protonic conductors has not been extensively studied in literature so far. This work represents a pioneering effort in that direction, with a systematic investigation of homogeneous Co-doped Ba(Ce,Zr)O3 (BCZC). The goal…
This talk will summarize the methods of testing and quality control that DRIFT IIe dark matter detectors underwent through the construction process. It will focus on the first series of steps to construct a detector; placing thousands of 50 'm diameter and 20 'm diameter wire 1 mm apart with minimal margin of error. I…