水性环氧玻璃鳞片重防腐涂料的研制

利用几种不同的表面处理工艺对玻璃鳞片进行表面处理,对比了各种表面处理工艺对玻璃鳞片涂料涂层性能的影响,发现利用硅烷偶联剂KH560直接掺混法处理玻璃鳞片效果较好.通过扫描电镜研究了经过硅烷偶联剂KH560直接掺混法处理的玻璃鳞片涂层和未经任何表面处理的玻璃鳞片涂层的内部结构,分析了玻璃鳞片经过硅烷偶联剂KH560表面处理之后涂层性能提高的原因.考察了不同粒径的玻璃鳞片对涂层性能的影响,结果表明80目的鳞片比较适合制备重防腐涂料.最后研究了玻璃鳞片的用量对于涂层性能的影响,发现在颜填料体积浓度(PVC)为24.70%时涂层具有最佳性能.     

有机物涂覆金属表面疏水性探讨

在三种金属基体表面上,分别涂覆聚丙烯、聚偏氟二烯、聚苯乙烯和石蜡等四种有机物后,探索了其疏水性.结果表明,聚丙烯(PP)涂层效果最好,其涂层能极大地提高金属表面的疏水性,与水滴接触角可高达140°;同时,结果还表明,采用简单的化学刻蚀法和浸泡涂覆法,可以在金属表面上制备良好而便宜的工程聚合物疏水性涂层.     

改进酸碱联合处理法制备钛基羟基磷灰石活性涂层(英文)

为了制备理想的钛基羟基磷灰石(hydroxyapatite,HA)生物活性涂层,对钛合金表面分别采用酸处理、碱处理和酸碱联合处理,经过预钙化和热处理后,于模拟体液中进行HA沉积试验.采用X射线粉末衍射仪分析HA涂层的化学组成,以扫描电镜观察所得涂层的表面形态.结果表明:酸碱联合处理法是理想的钛合金表面处理法,所得表面呈多孔状,表面粗糙,对HA涂层沉积和结合强度的改善极为有利;模拟体液法所得涂层主要由HA组成,沉积物为云团状或球状;与相关文献比较,涂层HA含量高,没有裂纹,并且在钛基金属表面形成了片状晶体,均匀覆盖于金属表面,球状颗粒间有空隙存在,有利于新骨形成和牢固的结合.     

氟硅低聚物杂化疏水表面的盐水污垢特性

采用溶胶-凝胶法制备了一种氟硅低聚物杂化疏水材料并在铜基表面上涂覆了疏水涂层.基于动态热阻法,在盐度为0%和7%的条件下,测试了改性表面的盐水抗垢性能.结果表明,涂覆了氟硅低聚物杂化疏水涂层具有较低的表面能,垢层与金属表面之间的附着力差,污垢不易沉积.不同盐度下涂覆涂层的污垢热阻的渐进值低于铜表面的渐进值,抗垢效果明显.     

玻璃表面TiO2涂层的溶胶——凝胶法制备及其光催化性能

用溶胶－凝胶法在玻璃表面制备了均匀透明的ＴｉＯ２涂层,讨论了影响ＴｉＯ２涂层质量的若干因素;测试了涂层玻璃的光透过率,用Ｘ射线光电子能谱仪研究了涂层玻璃的表面组成。在Ｂ光照射下,ＴｉＯ涂层玻璃可以使敌敌畏光催化降解。     

在非水溶液体系中电泳沉积Ti6Al4V/BG/HA梯度涂层

本工作的目的是探索制备钛合金表面生物活性梯度涂层的新方法 ,提高涂层的结合强度及稳定性 .通过诱导羟基磷灰石 (HA)在生物玻璃 (BG)颗粒表面的结晶 ,改变了生物玻璃表面的带电特性 ;采用电泳沉积 (EPD)法 ,在非水溶液体系中实现了BG和HA在阴极Ti6Al4V基体上的共沉积 ,经烧结获得了生物活性梯度陶瓷涂层 ,得到了一种制备生物活性梯度陶瓷涂层的新工艺 .用XRD对涂层的相组成进行了定性分析 ,结果表明涂层由HA ,榍石和玻璃组成 ;采用粘结拉伸法测定的涂层与基体结合强度大于 18MPa,用SEM观察涂层表面及断面的形貌 ,可见涂层表面较为平整 ,没有明显的裂纹 ;涂层与基体结合紧密 ,且存在一明显的界面梯度区域 .     

溶胶凝胶法制备铜镉光色玻璃涂层的研究

用溶胶凝胶法在普通平板玻璃表面上制备了铜镉光色玻璃涂层.样品具有可逆的光色性.X-射线衍射和红外光谱分析表明:铜镉光色玻璃涂层的光色相为CuBrxCl1-x固溶体,结构网络由Si-O-Si、Si-O-B和Si-O-Al键连接而成.     

医用Ti合金表面生物玻璃涂层的制备与研究

在医用Ti合金表面涂覆一层生物玻璃涂层可阻止金属离子的溶出并且提高其生物活性。本文采用溶胶-凝胶法在Ti合金基体上制备了SiO2-CaO-MgO-P2O5系生物玻璃涂层。利用差示量热扫描仪(DSC)、扫描电镜(SEM)、拉伸试验和模拟体液(SBF)浸泡等手段系统研究了涂层的表面形貌、粘附性能及生物活性。结果表明:热处理温度为800℃时涂层与基体间的粘附强度最大,涂层越薄涂层与基体间的粘附强度越大;在模拟体液中浸泡30天后,材料表面生成了大量磷灰石。用溶胶-凝胶法可在Ti合金基体上制备出SiO2-CaO-MgO-P2O5系生物活性高的生物玻璃涂层。     

溶胶-凝胶法在医用Ti合金表面制备SiO2-CaO-MgO-P2O5系生物玻璃涂层

在医用Ti合金表面涂覆一层生物玻璃涂层可阻止金属离子的溶出并且提高其生物活性。本文采用溶胶-凝胶法在Ti合金基体上制备了Si02-CaO-MgO-P2O5系生物玻璃涂层。利用差示量热扫描仪（DSC）、扫描电镜（SEM）、拉伸试验和模拟体液（SBF）浸泡等手段系统研究了涂层的表面形貌，粘附性能及生物活性。结果表明：热处理温度为800℃时涂层与基体间的粘附强度最大，涂层越薄涂层与基体问的粘附强度越大；在模拟体液中浸泡30天后，材料表面生成了大量磷灰石。用溶胶-凝胶法可在Ti合金基体上制备出SiO2-CaO-MgO-P2O5系生物活性高的生物玻璃涂层。     

全氟聚醚硅氧烷与SiO_2复合制备耐久性超疏水涂层

采用硅烷偶联剂KH550改性全氟聚醚制备了全氟聚醚硅氧烷,用溶胶凝胶法制备了粒径为200 nm的SiO_2溶胶,然后用KH550对SiO_2溶胶进行表面修饰,采用浸渍法在玻璃表面制备SiO_2涂层,用全氟聚醚硅氧烷进行表面修饰,制备了超疏水涂层,探究了SiO_2用量、硅烷偶联剂用量、修饰物质,以及放置时间对超疏水涂层的影响。结果表明:当SiO_2的质量分数为60%,硅烷偶联剂的质量分数为0.1%时,用全氟聚醚硅氧烷修饰后,水滴在玻璃表面的平均接触角为151.1°,且放置30天后仍具有超疏水效果。     

Advanced Porous Coating for Low-Density Ceramic Insulation Materials

The need for improved coatings on low-density reusable surface insulation (RSI) materials used on the space shuttle has stimulated research into developing tougher coatings. The processing of a new porous composite "coating" for RSI called toughened unipiece fibrous insulation is diseassed. Characteristics including performance in a simulated high-speed atmospheric entry, morphological structure before and after this exposure, resistance to impact, and thermal response to a typical heat pulse are described. It is shown that this coating has improved impact resistance while maintaining optical and thermal properties comparable to the previously available reaction-cured glass coating.     

Glass-to-metal seals for solid oxide cells at the Politecnico di Torino,an overview

A summary and update of the research on the design, process, and testing of glass and glass-ceramic to metal seals for solid oxide cells (SOC) conducted during the last 13 years at the Politecnico di Torino, Italy, within our research group and with several international collaborations, is presented and discussed. Glass and glass-ceramic-based materials play a key role in SOC performance and durability as well as in the sealing and joining of metallic interconnects. The sinter-crystallization method is a powerful technique that is used to obtain dense and reliable glass-ceramics capable of providing hermetic joining and seals. The issues, learned from our experience, that have an impact on the lifetime behavior of glass and glass-ceramic to metal seals are briefly reviewed in terms of challenges and working conditions. The mechanical characterization of glass-to-metal seal materials has a crucial impact on the overall performance, as the metal–glass interface plays a key role on the final joining strength and reliability. Several glass compositions are presented along with results on their characterization and behavior as joining materials for metallic interconnects, with a focus on their potential use as SOC seals.     

SiCp/Al复合材料化学镀镍工艺的研究

采用在高体分碳化硅增强铝基复合材料表面化学沉积Ni-P合金镀层的方法来改善焊接性能.本文用特殊的前处理工艺,在复合材料表面形成结合牢固、光亮、致密、均匀、连续的Ni-P合金镀层,并观察了镀层形貌和镀覆过程的差异.将不含贵金属钯的活化液应用于该复合材料的活化过程,不仅成功地化学沉积上良好的镍磷镀层,而且能够大大降低成本.采用X射线衍射、扫描电子显微镜、能谱对基体材料和镀层的结构、表面和截面的微观状态、元素组成进行了测试.结果表明:在酸性镀液中获得的镀层是微晶结构,属于中磷镀层;在碱性镀液中获得的镀层是晶态的,属于低磷镀层.     

Fabrication of abrasion-resistant micro-nano hierarchical structure on glass surface by a hydrothermal corrosion method

When applying an additional coating method to fabricate micro-nano hierarchical structure required for superhydrophobic function on glass surface, the hierarchical structure does generally not have good abrasion resistance, due to the weak adhesion between coating and glass surface. However, glass itself is a material with good abrasion resistance. A micro-nano hierarchical structure with honeycomb-shaped micro-armor protection on glass surface by a two-step hydrothermal corrosion method has been constructed: the first step of hydrothermal corrosion in water to construct micro-armor structure, and the second step of hydrothermal corrosion in sodium citrate aqueous solution to fabricate micro-nano hierarchical structure. The advantages of this new method are: the treatment process is simple, and there is no need to apply additional coatings. The micro-nano hierarchical structure constructed on glass surface by this method has a great abrasion resistance. After 1,000 cycles of abrasion under harsh conditions, the nano-structure on glass surface can still be remained intact. It provides a new method for fabricating abrasion-resistant micro-nano hierarchical structure on glass surface, as well as a new approach to the preparation of abrasion-resistant superhydrophobic glass.     

塑性成形中摩擦与润滑问题初步再探讨

本文从塑性成形工艺，金属表面涂层，模具表面处理，润滑剂的选用多角度探讨塑性成形中的摩擦与润滑问题，对塑性变形前金属涂层性能的要求进行了评价，最后简述了模具表面涂层处理和难熔金属塑性变形对润滑剂的要求。     

熔烧温度对Al-SiC硅酸盐基陶瓷涂层性能的影响

以硅酸盐溶液为基料,添加金属Al粉、SiC、TiO₂、玻璃料等陶瓷骨料,采用高温熔烧法在304不锈钢表面制备了硅酸盐基陶瓷涂层,使用扫描电子显微镜(SEM)、热重分析仪(TG)、X射线衍射仪(XRD)等研究了熔烧温度对涂层性能的影响。结果表明,涂层在700~1 100 ℃熔烧过程中,陶瓷涂层与金属基体之间呈冶金结合,伴随有Al₂O₃和TiO₂的晶相转变;涂层厚度为150 μm,并在800 ℃熔烧固化时,结合强度最高,为23.3 MPa;涂层经1 000 ℃高温熔烧后剩余固体含量为76.7%,表现出良好的耐高温性。     

Antioxidant Coating of SEN for Thin Slab Con-casting

The SEN for thin slab con-casting is easy to break and damage because of the oxidation during preheating and application. The enamel coating material is generally applied on the surface of SEN to avoid the oxidation. The coating material with born glass and silicon as main starting materials and silica sol as binder was studied. ZrO2 - C and Al2O3 - C materials containing 15% carbon were isostatic pressed, and heated at 600 ℃ , 900 ℃ , 1 200 ℃ , 1 500 ℃ for 2 h, respectively. The results show that the coating material with 70% of boron glass and 30% of silicon bonded by silica sol can form denser protection layer in the above mentioned materials at the range of 600 -1 500 ℃. The oxidation area ratio and weight loss ratio with the coating are much lower than those without the coating.     

金刚石微粉表面镀覆技术研究进展

金刚石微粉表面镀覆能够提高其热稳定性、增强其对金属的润湿性和改善表面物理性能,对金刚石微粉的性能提高具有重要意义。综述了适用于金刚石微粉表面镀覆技术的化学镀、溶胶凝胶镀及原子层沉积镀等方法,总结了每种方法的原理、优缺点及研究进展,最后对金刚石微粉表面镀覆进行了展望。     

Investigation of Antiadhesion Coatings for the Sag Bending of Silicate Glass

In the article, the features of the interaction of different forms of carbon with various solvents are investigated comprehensively, and the nature of defects and their effect on the optical and physicochemical properties of coatings are studied. The compositions of high-temperature antiadhesion parting mixtures for sag bending which are based on the high-temperature lubricants of carbon-containing materials are investigated. Base on the research, the mechanisms of the coagulation of particles during heat treatment, the effect of the structure and particle size of the studied mixtures on the coating quality, and the interaction with binders were studied, which made it possible to obtain high-temperature antiadhesion coatings with predetermined characteristics. The technology of applying these mixtures on the surface of glass billets and removing them from the glass surface, while meeting the environmental safety requirements, is developed.     

高分子表面金属化技术

高分子表面金属化是对高分子材料表面进行改性处理使其具有良好物理性能、力学性能及金属光泽的表面技术,广泛应用于高分子导电、薄膜修饰、电磁屏蔽等领域。本文综述了高分子表面金属化的两大类技术方法,即干法镀膜和湿法镀膜。介绍了几种典型的表面处理技术,如真空镀膜、喷涂金属转移法、化学镀、化学还原金属化以及电镀,并总结了它们的技术特点以及在科学研究和工业生产应用中的难点。阐明了从传统电镀技术发展而来的高分子表面直接电镀工艺的优势,直接电镀工艺省去了电镀前的活化工序,缩短了工艺时间,避免了电镀前工艺对环境造成的污染,成为高分子表面金属化技术发展的新方向。