Materials Literature
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The disturbance of flat and V-shaped sandwich reactive armor configurations to shaped-charge jet is studied by a numerical approach. The disturbing and cutting effects of the two reactive armor configurations to the jet are successfully captured. The predicted disturbance characteristics and patterns are in fairly goo…
The J Integral of an elastic-plastic curved crack under quasi-static loads has been mainly worked in the paper,and the J Integral has been calculated as a practical application of a second order perturbation method and theorem of surname KA where the effect of quasi-static applied stresses and normal and shear stresse…
The effects of samarium(Sm) on microstructure and corrosion resistance of AZ92 magnesium alloy were characterized and analyzed by scanning electronic microscopy, X-ray diffraction, mass loss test, electrochemical impedance spectroscopy, X-ray photoelectron spectroscopy and potentio-dynamic polarization test. The resul…
新方向性地团结的基于 Ni 的 superalloy DZ24，没有稀罕、昂贵的元素的增加，是 K24 合金的修正，在这份报纸被学习。微观结构和压力破裂性质通常，演员组和方向性地团结的 superalloys 比较地被分析。K24 合金的微观结构由组成，这被显示，， / eutectics 和 MC 碳化物。与 K24 多晶的合金的微观结构相比， / 最容易溶解完全溶解进矩阵，罚款和常规阶段重新猛抛，并且 MC 碳化物在 DZ24 在热处理以后分解碳化物到 M6C/M23C6 合金。DZ24 合金的破裂生活比 K24 合金的长是 two times。越多同类尺寸猛抛，越 longer 破裂生活。变粗和 rafting 行为猛抛在压…
以十六烷基三甲基溴化铵（CTMAB）为模板剂,制备了改性中孔分子筛Zr-FSM-16、Al-FSM-16和Zr-Al-FSM-16,并用XRD、SEM、IR及BET等技术手段对分子筛进行表征.在无溶剂条件下,考察了它们对2-甲基吲哚与环己烯-2-酮的Michael加成反应合成药物中间体3-（2-甲基-1H-吲哚-3-基）环己酮的催化活性.实验结果表明,Al、Zr掺杂进入分子筛骨架中,导致分子筛孔道变大,而骨架结构没有明显改变;Al、zr掺杂改性的FSM-16分子筛催化剂活性有了较大提高,其中Zr-FSM-16分子筛催化剂表现出较好的活性.在催化剂用量7.5％、2-甲基吲哚与环己烯-2-酮的摩尔比1.0∶1.1、反应温度80℃、反应…
在最近的年里，传播使流体化的床燃烧苍蝇灰(CFA ) 为 geopolymer 被用作原料合成。氢过氧化物作为一个起泡沫的代理人被采用准备基于 CFA 的泡沫 geopolymer。CFA 的粒子分发，矿物质作文，和化学作文第一被检验。Geopolymerization 产品被机械测试描绘，扫描电子显微镜学(SEM ) ， X 光检查衍射(XRD ) ，和 X 光检查荧光(XRF ) 。基于 CFA 的泡沫 geopolymer 成功地与氢过氧化物的不同内容被制作并且与 Si/Al 和 Si/Na 的相对低原子比率展出了 uncompleted 碱反应和合理力量。在这研究的 Type-C CFA 能为 geopolymer 生产作…
A novel mesoporous TiO2 material(m-TiO2) was obtained by a soft chemistry method in the absence of any surfactants or templates. It was shown that the m-TiO2 had an anatase crystalline structure with well-distributed mesopores from XRD, N2 adsorption-desorption isotherms, FESEM and TEM. The FT-IR results indicated tha…
Severe localized corrosion of ZG06Cr13Ni4Mo stainless steel hydraulic turbine blades after years of service is analyzed by means of examinations of macro-morphology, micro-morphology and energy dispersion spectrum(EDS) to identify the causes of corrosion. The results indicated that the initiation of pitting was closel…
A material is said to be fl exoelectric when it polarizes in response to strain gradients. The phenomenon is well known in liquid crystals and biomembranes but has received less attention in hard materials such as ceramics. Here we derive the governing equations for a fl exoelectric solid under small deformation. We a…
Growth kinetics of proeutectoid ferrite,including grain boundary face nucleated ferrite,grain boundary edge nucleated ferrite allotriomorph and intragranular ferrite idiomorph,were experimentally measured in an Fe-0.09C-1.5Mn-0.2Si steel and compared with theoretical calculation in local equilibrium and paraequilibriu…
Introduction: Parkinson's disease (PD) is a neurodegenerative disorder characterized by progressive destruction of the nigrostriatal dopaminergic neurons. The origin of this neuronal degeneration is unknown and probably involves many events including oxidative stress, inflammation, excitotoxicity and apoptosis. Curren…
Various conditions were investigated in detail for the novel organic template-free static hydrothermal synthesis of SUZ-4 zeolite in the presence of seeds. The obtained samples were characterized by XRD(X-ray diffraction), SEM(scanning electron microscope), TG(thermal gravimetric analysis), ICP(inductively coupling pl…
Sterile seedlings of Potamogeton crispus L. were cultured by tissue culture technique,and were used as experimental materials. In this study,the effects of exogenous calcium( Ca) application on mercury( Hg) accumulation,mineral nutrition, photosynthetic pigments,superoxide anion,hydrogen peroxide,malondialdehyde( MDA)…
三氟化 1,8-napthalimides 被综合从古老。他们的结构被 NMR 和 EIMS 分析描绘。混合物 1b 和 1c 的结构被 X 光检查衍射分析也证实，它证明他们拥有了不同收拾行李的模型。他们的 optoelectronic 性质被调查。结果显示所有 naphthalimides 拥有好溶解度和低 LUMO 精力水平，它在 n 类型半导体使他们成为好答案处理候选人。
The effects of chloride donor and aging temperature of neodymium isopropoxide /diisobutylaluminum hydride / chloride donor( Nd( OiPr)3/ Al( iBu)2H / RCl) catalyst on isoprene polymerization were investigated. The resulting polymer was fully assessed by NMR,IR and GPC. Chloride donors greatly influenced the relative mo…
为忍受各种大小的盾通道机器的戒指的 42CrMo 钢的热处理性质被光显微镜(OM ) 调查，扫描电子显微镜(SEM ) ，传播电子显微镜(TEM ) ，和影响测试。进 42CrMo 钢的 0.03 wt% C 的增加能增加坚硬。但是因为更粗糙的碳化物的外观，它沿着奥氏体谷物边界在矩阵和碳化物由 46 J 减少冲击能。进 42CrMo 钢的 0.40 wt% Mn 的增加能改进 hardenability。然而，主要因为碳化物并且加强矩阵变粗，钢的坚韧被 26 J 也减少。42CrMo 钢的 hardenability 和坚韧能被增加 1.49 wt% Ni 并且减少 0.32 wt% Cr 改进。变硬的层的深度能在 20 点被提起…
The eutectic carbide and nitride could precipitate the end of solidification during electroslag remelting process.Because of the high precipitation temperature and thermal stability they would finally remain in the product even through heat treatment,resulting in severe effects on mechanical performance for H13hot wor…
包含减少的组的新奇 hyperbranced 聚合物成功地被准备并且描绘了使用 redox/reversible 增加破碎链转移(木排)/self-condensing 乙烯基聚合(SCVP ) 方法。开始象 /-CONH2 ， Ce ( IV ) /-CONH2 和 Ce ( IV ) /-OH 被选择增加产生率的自由的基的 Cu ( III )那样的化学药品的几个氧化还原作用，和链转移代理人( CTA )被用来减少宣传率的分子的链，以便与分叉的高度获得聚合物。基于分子的重量详细说明了分析，价值和聚合物( DB )分叉的度从 1H-NMR 获得了系列，多，察觉者尺寸排除层析( MDSEC )建议了与 Cu ( III ) /-C…
In order to control the grain size of forged turbine disk of wrought superalloy like GH4738 more effectively, constitutive equations and grain structure evolution models of GH4738 alloy are used in Deform 3DTM for achieving integrated simulation of whole forging process of GH4738 alloy turbine disk(from preheating bil…
0.7 wt% 磅 + 0.3 wt% Rh/Ce0.6Zr0.4O2 催化剂经由不同方法，包括的超声帮助膜减小(UAMR ) 一起沉淀， UAMR 分离降水，合作受精，和顺序的受精被制作。催化剂被 N2 吸附， XRD， TEM，和 H2-TPR 技术 physico 化学上描绘，并且评估了因为有模仿的汽车的三路的催化活动用尽。准备降水的催化剂展出了的 UAMR co-precipitation- 和 UAMR 分离为在瘦条件下面的 NOx 减小的高表面区域和金属分散，宽窗户和优秀变换。从 UAMR 降水的新鲜、年老的催化剂显示出 ca 的高表面区域。6067 m2/g 和 1822 m2/g，分别地 41%55% 的高金属分散…