Materials Literature
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How layer-segregated distribution of SiC affects the ablation of C/C-SiC composites was studied in the present work.A certain amount of SiC particles was deposited at the non-woven（C/C—SiC-1） and web（C/C-SiC-2） layer of 2D needle-punched carbon fibre fabric reinforced pyrocarbon composites,respectively.Ablation under…
The adsorption of cesium (Cs) onto Prussian blue (PB) with different crystallite sizes is investigated to examine the limitations of the adsorptive penetration of Cs ? into PB crystallite. The adsorption of Cs ? onto soluble PB occurs via ion exchange with a charge-compensation cation like K ? , which originally resid…
通过预辐射接枝方法将光敏性单体甲基丙烯酸-4,5-二甲氧基-2-硝基苯甲酯(DMNBMA)以共价键方式接枝到聚乙烯(PE)表面。系统地研究了辐射接枝动力学,考察了吸收剂量、反应温度、反应时间、单体浓度等因素对接枝率的影响。通过红外光谱(FT-IR)对接枝后材料的化学结构进行了表征,结果表明DMNBMA成功接枝到PE上。用紫外光对接枝后样品PE-g-PDMNBMA进行照射,使接枝链上的光敏基团4,5-二甲氧基-2-硝基苯甲酯发生光解反应而转化为羧基,红外表征证明了光解反应成功进行,同时接触角测试证明材料经紫外光照后由疏水变成了亲水。辐射接枝DMNBMA可以成功实现对材料表面的光敏化修饰。
To make recycling utilization of organic materials produced in various agricultural systems, five kinds of organic materials were applied in a field test, including crop straw(CS), biogas residue(BR), mushroom residue(MR), wine residue(WR), pig manure(PM), with a mineral fertilizer(CF) and a no-fertilizer(CK) treatmen…
The water-borne side aminopolysiloxane modified polyurethanes(WSSPU) were prepared by polyaddition reaction using poly(tetramethylene oxide)glycol, polyethylene glycol, and side aminopolysiloxane as soft segments, dimethylolpropionic acid as hydrophilic chain extender, 1,4-butanediol as hard segment regulator and isop…
The tube rotation method(TRM) refers to the rotational movement of steel tube about its axis as well as translation in rolling direction in stretch reducing rolling process.The influence of the TRM on transverse wall thickness precision of seamless steel tube was studied.Thickness distribution of the TRM was obtained…
Different proportions of PCL / PLLA random copolymers made from e-caprolactone( e-CL) and Llactide( L-LA) were synthesized by ring-opening polymerization. Copolymers were added to PLA by melt blending to afford PLA / P( CL / LLA) blends. The compatibility,thermal and mechanical properties of the blends were studied. T…
改进 flame-retardant 效率和铵 polyphosphate (应用软件) 的水抵抗，紫外可医好的 pentaerythritol triacrylate (PETA ) 经由紫外治好聚合方法习惯于 microencapsulate 应用软件。准备 PETA-microencapsulated 应用软件(PETA 应用软件) 被 Fourier 变换描绘红外线的光谱学(FTIR ) ，扫描电子显微镜学(SEM ) ，和 thermogravimetric (TG ) 分析。PETA 应用软件独自被用作膨胀火焰 retardant (IFR ) 到火焰延迟聚丙烯(PP ) 。PP/PETA-APP composites…
结晶化和聚乙烯 terephthalate (宠物)的热老化行为上的 2 )用微分扫描被学习了热量测定( DSC )和极化的光显微镜学( POM )， viscometry ，张力的严峻、扫描的电子显微镜学( SEM )。为非等温、等温的结晶化，宠物的结晶化率与增加 SiO 的内容更加增加 提供很多成核地点的 2 ，而是 nanocomposites 的相对 crystallinity 与整洁的宠物的有小差别。根据 POM 观察，宠物的成核变得更快，成核密度与增加 SiO 显著地增加 2 内容。热地在 190 点为宠物和它的 nanocomposites 变老????瀠牡楴畣慬整????????????????????????…
In this study, it was reported a novel approach for joining Cf/Al composites and TiAl intermetallic by selfpropagating high-temperature synthesis(SHS). Mixed powders of 14Al–2Ni–3CuO were used as the SHS interlayer, and differential thermal analysis test of Al–Ni–CuO interlayer was conducted to analyze the exothermic…
Calcium sulfate hemihydrate（CSH） whiskers were synthesized by phase transition in CaCl2 solution under atmospheric pressure.Analytical-grade calcium sulfate dihydrate（AR CSD） was used as the raw material for the synthesis of CSH whiskers,according to orthogonal experiments.The effects of reaction temperature,AR CSD co…
The effects of different surface pretreatment methods on the nucleation and growth of ultra-nanocrystalline diamond(UNCD) films grown from focused microwave Ar/CH_4/H_2(argonrich) plasma were systematically studied.The surface roughness,nucleation density,microstructure,and crystallinity of the obtained UNCD films wer…
Effects of strain rate and water-to-cement ratio on the dynamic compressive mechanical behavior of cement mortar are investigated by split Hopkinson pressure bar(SHPB) tests. 124 specimens are subjected to dynamic uniaxial compressive loadings.Strain rate sensitivity of the materials is measured in terms of failure mo…
An activation process for developing the surface and porous structure of palygorskite/carbon(PG/C) nanocomposite using ZnC l2 as activating agent was investigated. The obtained activated PG/C was characterized by X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FTIR), field-emission scanning electron mi…
在二 austeno 以铁酸盐为主要成分的瘦双不锈钢(瘦决策支持系统) 的第二等的阶段的降水动力学在老化以后被检验在 800 点的材料吗？不同温度和紧张率。张力的测试在 300500 的温度范围被执行吗？
在中国形成技术和理论的新表金属的开发在这份报纸详细被考察。Mg 合金的变丑机制上的水晶粘性的进展第一被描述，特别表形成的预言上的它的应用处理。然后，一个新宏观的组成的模型被介绍，它拥有紧张 / 压缩 anisotropy 并且各向异性的变硬的一个提高的描述能力。以便考虑六角形的拥挤不堪的材料的 twinning 过程，一个修改层次多尺度的模型也在一更短的计算时间与足够的精确性被建立。主要关于铝合金，表金属的先进形成限制也被调查。除上述理论开发以外，形成技术的某新表金属同时被考察。Mg 合金的温暖的形成技术被讨论。形成表部分并且把试管弄弯的新过程被使用难小粒建议。在另一方面，基于由介绍更多的剩余奥氏体和 Cu 富有的阶段增加延伸和力…
A series of Yb3+ -Tm3+ and Yb3+ -Er3+ codoped NaYGdF4 upconversion luminescent nanoparticles were prepared via a facile modified solvothermal method. The phase(cubic or hexagonal),size and upconversion luminescence properties of the final products can be well controlled by adjusting Gd3+ content. The introduction of G…
High deformability X80 pipeline steel with microstructure composed of bainite and martinsite/austenite(B+M/A) can be obtained through the coiling continuous partitioning process. Effect of coiling temperature on the microstructure evolution and mechanical performance of the(B + M/A) X80 pipeline steel was studied by m…
Cu3Ti 合金的微观结构和性质上的 Ni 增加和老化处理的效果被调查。微观结构和降水阶段被 X 光检查衍射描绘，扫描电子显微镜学，和传播电子显微镜学；产生合金的坚硬，电的传导性，和有弹性的模量也被测试。结果证明 Ni 增加增加电的传导性和有弹性的模量，但是减少年老的 Cu3Ti 合金的坚硬。在试验性地调查的参数的范围以内，为 Cu3Ti1Ni 和 Cu3Ti5Ni 合金的最佳的二阶段的老化处理是 300
Conducting polymers represent a promising application prospect in the field of metal corrosion control. In this investigation, poly(o-toluidine) (POT)/nano zirco- nium dioxide (ZrO2) composite were prepared by in situ polymerization of o-toluidine monomer in the presence of nano ZrO2 particles. Fourier transformation…