Materials Literature
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对3 mum厚的AZ31-O镁合金板和6061-T6铝合金板进行异种材料搅拌摩擦焊.实验中搅拌针的旋转速度为600～1400 r/min,前进速度为20～60 mm/min.结果表明,在旋转速度1000 r/min、前进速度40 mm/min的工艺条件下,可以获得无缺陷的焊接接头.组织观察发现搅拌区的晶粒尺寸要比基材区的明显小很多.在搅拌区形成了复杂的金属流动.显微硬度测试表明搅拌区的硬度分别是不均匀的.拉伸实验结果表明,接头的拉伸强度约为基材AZ31镁合金的76％,或6061铝合金的60％.接头拉伸断口SEM形貌观察表明为脆性断裂.
Perubahan iklim merupakan hal yang penting saat ini. Kenaikan suhu yang merupakan salah satu penyebab perubahan iklim/ global warming, juga disebabkan banyaknya penggunaan beton sebagai material dasar suatu bangunan baik itu jalan, jembatan, maupun gedung, karena beton yang bersifat panas. Dengan hal ini dibutuhkan su…
Reaction pathways for the formation of thiolate-gold nanoparticles are investigated by density functional theory(DFT) and a new mechanism upon solvent polarity and tetraalkylammonium is obtained. In solvents with high polarities, [Au(I)SR]n polymers can be formed as the precursor of metal ions prior to the addition of…
) 阶段没被溶解阻碍的谷物边界打手势它使谷物尺寸没在 homogenization 的过程改变。最佳 homogenization 条件是 545 °C/16 h。张力的力量增加了，收益力量减少了，粘性在 545 °C/16 h homogenization 处理以后显然改善了。
The aim of this work is the synthesis of new Schiff base derived from PVA and Erythro-ascorbic acid derivative (pentulosono-?-lactone-2,3-enedianisoate) and its metal complexes of biological significance. All synthesized compounds were characterized by Thin layer chromatography (TLC) and FTIR spectra and aldehyde was…
采用“烧结-球磨”方法制备Mg0．92 In0．05 Zn0．03三元固溶体合金，减小了Mg的晶格常数.利用粉末X-射线衍射分析合金的相组成、微观结构和吸放氢过程的相转变，通过扫描电镜观察合金的微观形貌及相分布.采用体积法测定合金的等温吸放氢曲线（ PCT）和动力学曲线，确定了合金的吸放氢反应焓变、熵变及氢化反应激活能.结果表明： Mg0．92 In0．05 Zn0．03三元固溶体具有良好的活化性能和动力学性能，脱氢反应焓降低至-68．6 kJ/mol H2.
Künstliche neurale Schnittstellen können verwendet werden, um das zentrale Nervensystem mit der äusseren Welt zu verbinden. Sie bieten deshalb grosses Potential für die Rehabilitierung von Patienten, die unter Lähmung, anderen Formen von motorischer Dysfunktion oder Amputationen leiden. Es wurden verschiedene Arten ne…
2-羟基4正辛氧基二苯甲酮（HOBP）与氯化铁在乙醇中经配位反应合成了一个新型的配合物——2-羟基-4-正辛氧基二苯甲酮合铁（Ⅲ）[Fe（OBP）3 （1）],其结构和光学性能经IR,LDI-TOF-MS,元素分析和UV-Vis表征.HOBP通过羰基氧和羟基氧原子与中心Fe以3∶1的比例形成配合物;1在329 nm有较强吸收,其loge为4.04.
The demands for fuel and the development of the fuel exploitation processes have make it economically possible to produce oil-gas from deeper and more corrosive wells where the parameters such as h ...
The transition from vortex glass to a liquid phase is studied in Ba Ni0.1Fe1.9As2 single crystal with Tc = 19.4 K by magneto-resistance measurements. The resistivity curves are measured in magnetic fields in a range of 0 T–13 T for H c and H⊥c. Good scalings for all values of resistivity ρ(H, T) and the effective pinn…
We observed the linear-to-zigzag structural phase transition of a40Ca+crystal in a homemade linear Paul trap. The values of the total temperature of the ion crystals during the phase transition are derived using the molecular-dynamics(MD) simulation method. A series of simulations revealed that the ratio of the radial…
采用氨基酸钠游离的氨基引发e-己内酯单体开环得到酯肽齐聚物,并以六亚甲基二异氰酸酯为扩链剂,将这些齐聚物扩链合成4种聚酯酰胺.将4种天然氨基酸（L-丙氨酸、L-亮氨酸、L-谷氨酸、L-赖氨酸）引入到聚（e-己内酯）（poly（e-caprolactone）,PCL）中,合成和表征了4种含有氨基酸残基的聚合物.通过1H-NMR、FT-IR、水接触角、水吸收率和降解实验对该聚酯酰胺进行了表征.实验结果表明：经氨基酸改性PCL的亲水性和降解性得到了改善,其中含有L-赖氨酸残基的聚酯酰胺因亲水性最高,降解速率最快.
X-ray powder diffraction is as a powerful tool for structural analysis of crystalline compounds which do not grow as single crystals, but a polycrystalline bulk. When applied under non-ambient conditions, or when data are collected at consecutive time intervals, X-ray powder diffraction can be readily turned into a va…
Magnesium hidroksida mempunyai prospek dan manfaat sebagai bahan baku penyimpan gas hidrogen, bahan baku pembuatan magnesium oksida (MgO), dan obat maag. Magnesium dipisahkan berdasarkan metode elektrolisis. Hasilnya berupa magnesium hidroksida. Penelitian ini bertujuan untuk mengendapkan magnesium hidroksida melalui…
叙述了热塑性弹性体（TPE）的结构特点、品种和性能,并对其中的主要品种TPS、TPO、TPV、TPU、TPEE、TPVC、TCPE以及TPA等进行了分别介绍.简述了TPE的不足与今后的发展方向.指出,TPE作为一种节能环保的橡胶新型原料,发展前景十分看好.
The world’s increased energy storage demand, as well as the environmental concerns related to the combustion of fossil fuels, has triggered a transition to intermittent renewable energy sources as well as to electrical and hybrid vehicles. Current day rechargeable batteries are, due to the invention and development of…
Wa nym aspektem technologicznym w produkcji generatorow pr dotworczych jest dobor odpowiednich materia ow konstrukcyjnych, bowiem od nich zale y wysoka sprawno energetyczna i niezawodno dzia ania tych urz dze . Interkonektor stanowi podstawowy element sk adowy ogniwa paliwowego, poniewa doprowadza on poprzez system ka…
以对氨基苯磺酸（PAS）、三聚氰胺（M）和甲醛（F）为原料,采用三步合成反应工艺合成了对氨基苯磺酸-三聚氰胺-甲醛树脂（PASMF）。研究结果表明：按照n（M）∶n（PAS）∶n（F）=1∶1.4∶5配比,设置羟甲基化阶段的反应温度为70℃、反应时间为1.5 h和pH为8.5,酸性缩聚阶段的反应温度为80℃、反应时间为1 h和pH为6,碱性重整阶段的反应温度为75℃、反应时间为1 h和pH为8.5,合成的PASMF综合性能良好;当w（PASMF）=1.0%（相对于水泥质量而言）时,水泥具有较好的分散性,水泥净浆初始流动度达240 mm。
Recently, there has been considerable interest in forming Filler as a means to improve several properties of Elastomers. For this purpose layered (CaCO3 and Stiric Acid "S.A" ) are now widely being used. These layered are a class of inorganic materials that are naturally layered in structure , 8 different rubber compo…
Increasing demand for light and durable materials in home and office furniture requires optimizing the properties of the products used. In this research the effect of skin type and core on mechanical properties of light weight sandwich panel was investigated. The skins were made of MDF with 3, 6 and 8 mm thickness, pa…