Activation and self-repairing effectiveness of lubrication with nano-tin as additives

Micron grade Sn powder, VG32 oil and active pharmaceutical were mixed and the Nanometer Sn lubricant additives were prepared. Nanometer additives with different Sn concentrations were used in Steel-brass Tribo-pair for friction and wear test. The activating method to nano-Sn and surface of brass samples was investigated, and the method to form relatively thick friction coating on samples was discussed. Surface elemental distribution, coating thickness and its surface appearance were analyzed with X-ray photoelectron spectrum (XPS), auger electron spectrum (AES) and scanning electron microscope (SEM) respectively. The result shows that the ultra-thick friction coating (approx 20 μm), with abundant tin and well combined with substrate, has formed on the brass sample. The friction coating revealed superior performance of friction reducing and anti-wear properties. Therefore, the results possess practical significance to self-repair usage on steel-brass tribo-pair in mechanical systems.     

轻稀土对WC-10 Co硬质合金表面PVD涂层微观结构与性能的影响

用轻稀土含量为0.1%的WC-0.1 RE-10 Co硬质合金混合料,在1380℃温度下真空烧结,制备CNMG-120408型号车刀.将刀具经喷砂和超声清洗后,采用磁控溅射工艺在表面沉积TiAlN涂层.对涂层刀具进行微观结构观察和切削性能实验.结果表明：轻稀土的添加有助于增加涂层与基体的结合力,延长使用寿命并降低制备成本.     

自然对流条件下亲水表面上的抑霜实验研究

结合结霜的机理,通过改变配方和工艺,研发了一种新型的亲水性涂料,把该涂料应用于不同的环境条件下,均取得了良好的抑霜效果,并且从双晶生长的机理、新型涂料中成分的特性方面在理论上分析了其抑霜的原因。     

Influence of hydroxypropyl methylcellulose edible coating on fresh-keeping and storability of tomato

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铜浸镀锡层形成过程分析

以硫脲作为电位调整剂,以甲烷磺酸锡为主盐的酸性溶液作为镀液,采用浸镀法在铜基材上制备了锡镀层.采用场发射扫描电子显微术(FESEM)和X射线衍射(XRD)表征锡镀层的组织结构,根据数码相机微距照片进行宏观分析.研究表明.该镀液体系浸镀锡可以获得光滑而致密的浸锡层,无枝晶形成.该镀层主要相结构为体心四方的白锡.镀层的形成可分为锡晶粒的剧烈瞬间形核、平面层状生长和镀层致密化排列3个阶段.     

锭模用耐火材料的流变性质与其工艺性能的关系

研究了水基锭模耐火涂料的流变学性质与其工艺性能之间的关系。实验结果表明,使用性能良好的锭模耐火涂料在低剪切条件下,应具有较大的表现粘度与屈服应力,以及较小的塑性粘度和适当的触变性。     

Experimental study on the interfacial delamination in a thermal barrier coating system at elevated temperatures

The failure mode and adhesion of thermal barrier coating (TBC) 8YSZ (ZrO2+8% (w/w) Y2O3) deposited on NiCoCrAlTaY bond coat by atmospheric plasma spraying were investigated. A grooved modified three-point bending specimen that can generate a single interface crack to facilitate the control of crack growth was adopted for testing, which was conducted at the ambient temperature of 100 °C. The morphology and composition of fractured surfaces were examined by means of a scanning electron microscopy (SEM) and an energy disperse spectroscopy (EDS). Images and spectrum show that cracks are initiated and propagated exclusively within YSZ layer adjacent to top/bond coat interface. The load-displacement curves obtained exhibit similar shapes that indicate two distinct stages in crack initiation and stable crack growth. Finite element analyses were performed to extract the adhesion strength of the TBCs. The delamination toughness of the plasma-sprayed 8YSZ coatings at 100 °C, in terms of critical strain energy release rate Gc, can be reliably obtained from an analytical solution.     

纳米材料的特性及其在建筑涂料中的应用

介绍了纳米材料的基本特性,纳米材料对建筑涂料的抗老化耐候性、耐擦洗、抗菌杀菌、净化空气、耐污染等性能的影响,以及其应用在建筑涂料中的技术关键.     

新型高性能防水涂料"防水胶王"的研制

阐述了防水胶王的产品配方、质量特点、防水性能的影响因素，适用范围和使用效果，指明了该防水胶王耐候性好，伸缩性大，不透水性佳，适用于各种屋面、地下满涂防水及特殊形状部位的防水。     

沥青路面除冰雪技术研究(英文)

为降低路面和冰雪之间的黏结力,用有机硅憎水材料作为道路表面涂层.有机硅憎水涂层技术的除冰效果用接触角实验和剪切实验来表征,其耐久性用加速加载磨耗实验来评价,而其抗滑性能则用摆式摩擦法和铺砂法来评价.接触角实验结果表明,有机硅憎水涂层材料与水的接触角为100.2°,具有很好的憎水性能.其次,通过剪切实验可以得出:在涂有有机硅憎水材料的情况下,冰层与试件表面的最大剪切应力仅为0.06 MPa,低于没有进行表面涂层处理的最大剪切力3.5 MPa;剪切之后,冰层能够很完整地从试件表面脱落.加速加载磨耗实验表明,在经过一定时间的磨耗之后,残留在沥青路面构造深度里的有机硅涂层材料仍然具有除冰雪的效果.表面涂层后的道路表面的BPN值和构造深度值均有所降低,但是其仍然远远大于规范的要求,确保了安全性.研究表明,沥青道路表面涂层技术能有效地降低沥青路面与冰层的黏结,从而解决冬季道路结冰影响行车安全的问题.