电沉积金属基复合镀层制备研究进展

金属基复合镀层广泛应用于微型刀具、内燃机气缸内壁、牙医钻头、活塞环镀层等方面.本文介绍了金属基复合镀层的电沉积制备方法,从沉积装置、颗粒分散、镀层均匀性以及镀层结合性等方面进行了探讨.分析了平板式、旋转式槽镀复合电沉积和不循环式、循环式喷流电沉积的特点和研究现状,在减小颗粒团聚、提升镀层颗粒含量和镀层结合性等方面给出了...     

电沉积高硬度复合镀层的研究与进展

近年来,电沉积复合镀层由于其独特的物理、化学、生物和机械性能而得到了迅速发展,综述了电沉积高硬度复合镀层的研究与进展,重点介绍了电沉积高硬度复合镀层的制备工艺性能及其应用等.指出了目前所存在的问题,并对今后的研究提出建议.     

电沉积方法对Ni-SiC纳米微粒复合镀层结构与性能的影响

分别采用磁力搅拌-直流电沉积法、超声波搅拌-直流电沉积法和超声波搅拌-脉冲电流沉积法制备Ni-SiC纳米微粒复合镀层,并探讨电沉积方法对复合镀层组织结构、显微硬度、耐磨性及耐蚀性的影响。结果表明:超声波搅拌能引发扰动搅拌和击碎分散等综合效应,对共沉积过程起到积极促进作用,明显改善复合镀层的形貌组织,提高硬度、耐磨性和耐蚀性;并且进一步替代加载脉冲电流后,脉冲电流和超声波的作用叠加,使电沉积制备的复合镀层表面更平整,结构更致密,硬度更高,耐磨性和耐蚀性也更好。     

Ni-Fe-TiO2复合镀层的制备及性能研究

采用复合电沉积技术制备了Ni-Fe-TiO2复合镀层.通过正交实验对复合电沉积工艺进行了优化,并对所得镀层的硬度、耐蚀性等综合性能进行了表征.结果表明:当TiO2的质量浓度为3g/L时,镀层的耐蚀性最好,硬度明显提高,此时TiO2微粒沉积在镀层中.     

稀土对电沉积Ni-W-B-SiC复合镀层

研究了加入稀土对电沉积Ni-W-B-SiC复合镀层的成份、结构、表面形貌、硬度等性能的影响规律.结果表明加入稀土有利于SiC与Ni-W-B的共沉积,使镀层结晶细化,RE-Ni-W-B-SiC复合镀层的硬度高于Ni-W-B-SiC复合镀层.     

复合电沉积研究的新动向

复合电沉积是获得功能性复合材料镀层的一种新工艺。综述了近年来国内外在复合电沉积研究方面的新动向。重点探讨了多元复合电沉积、纳米复合电沉积、功能梯度材料复合电沉积的研究现状和发展趋势。这三类复合镀层在耐磨性、抗腐蚀性和抗高温氧化性等方面比传统的复合镀层更优越。展望了今后复合电沉积的研究和应用前景。     

稀土对电沉积Ni-W-B-SiC复合镀层组织结构及性能的影响

研究了加入稀土对电沉积Ni-W-B-SiC复合镀层的成份、结构、表面形貌、硬度等性能的影响规律.结果表明:加入稀土有利于SiC与Ni-W-B的共沉积,使镀层结晶细化,RE-Ni-W-B-SiC复合镀层的硬度高于Ni-W-B-SiC复合镀层.     

复合镀层的现状与发展

复合镀层的制备工艺有很多,目前主要有复合电镀法、复合化学镀法、复合刷镀法以及几种工艺配合等方法,本文主要介绍用复合电沉积法制备的镀层的分类、特性及应用。     

复合电镀的研究新进展

综述了近年来国内外在复合电镀研究方面的进展。重点探讨了多元复合电沉积、纳米复合电沉积、含稀土复合电沉积、功能梯度材料的复合电沉积的研究现状和发展趋势。资料表明：复合材料镀层的耐磨、耐蚀、抗高温氧化等性能优于单金属镀层或合金镀层。复合镀层在今后的发展中将有更广阔的应用前景。     

Ni基金属微纳米颗粒复合涂层的研究进展

从镀层的电沉积工艺、镀层组织结构及性能特点等方面出发,综述了电沉积工艺参数对镀层组织结构和耐蚀性、耐磨性、电解析氢性能的影响,以及后续的热处理工艺对镀层组织及性能的影响。以Ni基金属复合颗粒镀层的电沉积机理和合金镀层的应用前景为出发点,提出了电沉积Ni基金属复合颗粒镀层的未来研究方向。     

建筑外墙复合型质感涂料的制备与应用

以改性硅丙乳液复合部分弹性乳液为基料,天然石英砂为主要填料,辅以纳米二氧化硅、纳米抗污助剂、空心玻璃微珠、反射隔热粉、多功能助剂等制成建筑外墙复合型质感涂料,其具有抗污、耐候、超耐久及反射与阻热等性能,外观上形象逼真、高贵质感、色彩丰富,施工简便,是一种新型多功能、高性能、高装饰性建筑外墙涂料。     

简述OEM汽车涂料的新进展

介绍了OEM汽车涂料的组成及复合涂层体系,全球五大涂料生产商所占汽车涂料市场份额概况以及CED涂料、高固体分涂料、水性涂料、粉末涂料等主要汽车涂料的技术进展情况,并指明了汽车涂料未来发展的方向与挑战。     

镍基自润滑复合镀层的研究进展

复合镀层由于具有优异的耐磨性、耐蚀性、自润滑等性能而受到广泛关注.采用电沉积或化学镀可以获得复合镀层,复合电镀也是制备复合材料的一种重要方法.本文主要对近几年国内外在镍基自润滑复合镀层方面取得的研究成果进行了概述.     

纳米SiO2复合涂料的合成研究进展

本文对纳米SiO2复合涂料的合成制备做了详细的综述,主要介绍了共混法、原位聚合法、溶胶-凝胶法、微乳液法、辐射合成法等,重点介绍了应用较为广泛的溶胶-凝胶法,并概述了纳米SiO2对涂料性能的影响及其特性和发展。     

羟基磷灰石复合涂层制备的研究进展

将羟基磷灰石复合涂层按照特征分为三类,即单层复合涂层、双层复合涂层和梯度复合涂层。概述了这三类羟基磷灰石复合涂层的特点,并简要介绍这三类羟基磷灰石复合涂层的制备方法和研究进展,对开发出反应步骤更为简单,反应条件更为湿和,生物相容性更好的硬组织置换材料的研究前景进行了展望。     

Characterization of the dispersion of tetrapod-like nano-ZnO whiskers in acrylic resin and properties of the nano-composite coating system

Tetrapod-like nano-ZnO whiskers were prepared by physical method. For small size and surface effect of nano materials, aggregation tendency should be resolved before practical application. Hence, different dispersing methods were designed and examined. Nano-ZnO/acrylic resin composite coatings were prepared to form nano-functional coatings. It was observed that the composite with uniform distribution of nano-ZnO in the acrylic resin had multifunctionalities. Different treatment methods for tetrapod-like nano-ZnO whiskers demonstrate an intensified affect on the final functional effects of composite coatings. The coatings can be used for plastic materials, etc. Furthermore, the mechanisms of the functions were also analyzed for the sake of understanding.     

四针状纳米ZnO/丙烯酸树脂复合多功能涂料

以丙烯酸树脂为基体,通过纳米微粒直接分散法,制备了四针状纳米ZnO/丙烯酸树脂复合材料。当硅烷偶联剂的用量为纳米ZnO的10%(质量分数)时,可获得ZnO微粒分散性好的复合材料,对该材料进行的红外吸收测定表明,复合体系的透射率随着纳米ZnO的加入急剧下降,具有良好的红外屏蔽性能,同时该涂料也表现出良好的抗菌及抗静电性能。     

Electrodeposition of Adherent Polyaniline-Polypyrrole Composite Coatings on Low Carbon Steel

Uniform and adherent polyaniline-polypyrrole composite coatings were electrochemically polymerized on low carbon steel under aqueous conditions. The structure of the coatings was analyzed as a function of electrochemical deposition parameters (molar feed ratio of monomers and reaction time). X-ray photoelectron spectroscopy (XPS) was used to study the chemical composition of the coatings and also the amount of dopants (oxalate ions) incorporated into the polymeric coatings. The morphology of the coatings was studied using scanning electron microscopy (SEM). The adhesion strength of the coatings was measured using simple lap joint tests. The composite coatings formed by an equimolar feed of the monomers were much more adherent than the homopolymeric coatings.     

水工钢闸门防腐维修情况调查及低表面处理涂料的应用前景

通过对华东地区水工钢闸门喷锌加涂料复合涂层防腐调查,得出各种自然环境条件,钢材的表面处理,涂层的配套、工艺等均与其防腐周期的长短有密切关系。对复合涂层在复涂维修时存在的缺陷进行分析,对低表面处理涂料在复涂维修中的应用前景作了展望。     

Electrodeposition of Adherent Polyaniline-Polypyrrole Composite Coatings on Low Carbon Steel

Uniform and adherent polyaniline-polypyrrole composite coatings were electrochemically polymerized on low carbon steel under aqueous conditions. The structure of the coatings was analyzed as a function of electrochemical deposition parameters (molar feed ratio of monomers and reaction time). X-ray photoelectron spectroscopy (XPS) was used to study the chemical composition of the coatings and also the amount of dopants (oxalate ions) incorporated into the polymeric coatings. The morphology of the coatings was studied using scanning electron microscopy (SEM). The adhesion strength of the coatings was measured using simple lap joint tests. The composite coatings formed by an equimolar feed of the monomers were much more adherent than the homopolymeric coatings.