Materials Literature
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CrAlVN coatings are of good intrinsic mechanical and tribological properties but lack of strength.Silicon can provide nitride coating high strength and excellent oxidation resistance.Logically,the combination of CrAlVN and Si should provide a good candidate for dry machining.The effect of silicon content on CrAlSiVN c…
过去的年与 nanoscale 的可编程的材料建设的一个中央焦点在 nanomaterials 科学见证 DNA 纳米技术的快速的开发。一个有效方法因此是高度合乎需要的(但是挑战性) 为结合 DNA 的 nano 反对和他们的 DNA 集会的分析 / 准备的纯化。在这方面， agarose 胶化电气泳动，为 biomacromolecule 分离被发明了的一种传统的技术，发现了许多创新使用。这象监视一样包括 nanoparticle 积木的形状，尺寸，充电，和 ligand 原子价分离一自己组装向产品鉴定和纯化的过程。
The Effect of NO2-on the early stages of pitting corrosion of Q235 carbon steel in a simulated concrete pore solution(p H=11) was studied by means of polarization curves, Mott-Schottky curves and XPS methods. It was found that, NO2-inhibits both the stable pitting corrosion and the metastable pitting corrosion. The me…
Electrochemical measuring methods have been widely used in the scientific researches on lithium ion batteries for obtaining kinetic properties of electrode. In this paper, the features of electrode,electrochemical polarization and measuring methods are introduced firstly. The application of cyclic voltammetry(CV), ele…
Using the pre treatment of the working photoelectrode and the admixture light scattering layer can ameliorate the performance of TiO2 dye sensitized solar cells (DSSCs). TiCl4 treatments on TiO2 elec trodes improve the adhesion and mechanical strength of the TiO2 layer. The HNO3 treatment significantly enhances the di…
Hybrid organic-inorganic lead halide perovskite solar cells(PSCs) have recently undergone rapid progress and exhibit high photoelectric conversion efficiencies of up to 19.3%. As light-absorber in PSCs, the hybrid organic-inorganic lead halide perovskite cannot be used in large-scale applications because of its high P…
Mn-Zn ferrite powders were produced from low-grade manganese ore (LMO) via the chemical co- precipitation method combined with the ceramic method, after the LMO was leached in sulfuric acid and the obtained solution was purified. The effect of the pH on the magnetic properties of Mn-Zn ferrite was investigated by the…
Using first-principles density functional theory based on the full potential linearized augmented plane wave method and the local spin density approximation(LSDA), the geometric structures of pure Li Mg N, Cu-doped Li Mg N, and Cu-doped Li Mg N with either excess Li or Li deficiency are optimized, and their electronic…
x =2.5wt% 和 5wt% composites。 DTA 结果显示 composites 的团结特征展出了 2 的一个变化?ㄠ?‰???????????搠獩档牡敧'L汩瑩?剈????朠??汣獡????汰獵瀭畬?????????????????吗?????睴?楴敭？？
Adopting a ceramic/polymer multilayer structure design to simulate the structure of nacre is usually believed to be an effective way to increase the toughness of ceramic composites at the expense of the material＇s bending strength. However, in this study, we found that both the bending strength and the toughness could…
Hydrogenation reactor suffers from a combination of high temperature, high pressure and cyclic load in the process of service, and the effects of creep and fatigue must be taken into account in design. ASME code case 2605 provides a creep fatigue life design method for hydrogenation equipment made of 2.25Cr1MoV steel.…
A graphite foam / eutectic salt composite was prepared by the infiltration of the foam by a molten binary eutectic nitrate( KNO3/ Na NO3) to improve its thermal conductivity as a phase change energy storage material. The thermal properties and stability of the composite and the eutectic salt were investigated by diffe…
在这研究，被动行为上的 ARB 过程的效果极端有细密纹理在一个硼酸盐缓冲区答案的 1050 铝合金(pH 6.0 ) 被调查了。microhardness 测试的结果表明 microhardness 与越来越多的 ARB 周期珍视增加。potentiodynamic 极化阴谋表明为标本的周期的更高的数字继续 ARB 进程而非退火的产量降低腐蚀和被动当前的密度和更多的高贵腐蚀潜力值。而且，电气化学的阻抗光谱学大小证明增加 ARB 周期的数字为形成被动电影提供更好的条件。
在微生物和矿物质之间的相互作用有潜力显著地作出贡献到各种各样的过程的全球周期并且用作在 geosphere 和生活之间的一个连接。泥土和泥土矿物质在农业上通常发生利用土壤，自然地秘密地被种(土壤和岩石) 并且在构造材料被使用。克莱矿物质在 geotechnics 和环境 geotechnics 用作自然、地质、技术的障碍。细菌接着在自然土壤，心土和岩石是无所不在的并且在与泥土矿物质的永久接触。有细菌能与泥土矿物质在交往并且改变他们的众多的方法：溶解，精炼和转变，从这些矿物质在泥土矿物质和踪迹元素的举起合并的踪迹元素的减小，例如，由泥土矿物质上的踪迹元素的 adsorbance 的 siderophores 和 chelators…
Sol-gel derived alumina coating was developed on 9Cr-1Mo ferritic steel and their oxidation behaviour was studied at 750-900 C in air atmosphere. The ele- mental composition of the coating was analyzed through energy dispersive X-ray analysis (EDX) while mi- crostructure of the oxidized substrates was examined through…
A newly designed hot-stamping steel alloyed by chromium(Cr)and manganese(Mn)without boron(B)addition was developed for automobile mass reduction.The experimental results showed the Cr-Mn alloyed steel could be quenched to full martensite microstructure when the cooling rate was higher than 14 ℃/s.Yield strength,tensil…
Dendrocalamus farinosus 和 Phyllostachys heterocycla 竹子日志为竹子纤维地席(BFM ) 的准备受到新奇处理进程，并且获得的 BFM 被用来制作增强的竹子纤维合成(BFRC ) 。我们学习了有或没有竹子节点从地席生产的 BFRC 的机械性质。在 BFM 的节点的存在极大地减少了张力的力量，压缩力量，弹性的模量，和 BFRC 的破裂的模量，当与节点从 BFM 制作的 BFRC 拥有了时更高水平砍力量。因此，在竹子灰煤杆的节点是在机械性质的一致分发的一个重要因素，并且 BFM 应该同类地被安排在 BFRC 的机械力量上减少节点的影响。
Mg-6%Zn-10%β-Ca3(PO4)2 composite was prepared through powder metallurgy methods with different chitosan coatings on its surface. The properties of the chitosan coatings on the surface of Mg-6%Zn-10%β-Ca3(PO4)2 composite, such as the adhesion ability, the corrosion behavior and the cytotoxicity properties, were investi…
在这研究，完成摆动在机械性质和线性低密度聚乙烯(LLDPE ) 的水晶的形态学上与不同频率(02.5 Hz ) 和振幅(020 公里) 砍被调查。LLDPE 什么时候结晶在下面，被发现因为更完美的水晶的结构， LLDPE 的机械性质被改进低频率、小振幅(0.2 Hz/4 公里) 摆动砍。机械性质能被增加频率或振幅进一步改进摆动砍。分别地，当频率被增加到 2.5 Hz，振幅在 4 公里被维持时，幼仔模量和 LLDPE 的张力的力量被 27% 和 20% 改进；当幼仔模量和张力的力量被 49% 和 47% 改进时，分别地，当振幅被增加到 20 时，公里和频率作为 0.2 Hz 被仍然是。LLDPE 在下面的 crystallinity…
被带进与对方的接触并且允许经由热地加速的散开反应。产生 perovskite 电影显示好光吸收和光滑的形态学。基于这些，电影显示出的太阳能电池 8.7% 的平均效率和 10% 的最大的效率。固态有机金属的 perovskite 的合成能也在灵活塑料底层上被执行。与 3.2% 的效率用 PET/ITO 底层上的这个方法生产设备。不同于为有机金属的 perovskite 电影的存在合成方法，固态反应方法不要求直角的溶剂或反应条件的小心的调整的使用，并且以后因此为大量生产显示出好潜力。