环己氧基硼酸铜抗磨减摩添加剂的研究

合成了环己氧基硼酸铜,在四球试验机和环-块试验机上评价了其摩擦磨损性能;利用X-射线光电子能谱仪(XPS)分析了磨斑表面主要元素的组成和价态.结果表明,环己氧基硼酸铜具有良好的减摩抗磨性能,其作用机理是添加剂在摩擦过程中发生了摩擦降解反应,生成了Cu2O和B2O3等反应产物沉积在摩擦表面,从而起减摩抗磨作用.     

硼化二正丁基二硫代氨基甲酸酯的摩擦学性能研究

合成了硼化二正丁基二硫代氨基甲酸酯的采用四球实验机和ＨＱ－１摩擦磨损实验机研究了其抗磨减摩性能,并采用Ｘ－射线光电子能谱仪（ＸＰＳ）分析了磨斑表面组成和元素价态。实验结果表明：硼化二正丁基二硫代氨基甲本 良好的抗磨减摩性能和承载能力,其作用机理可能是添加剂在摩擦过程中与金属表面作用,形成含有机硼、有机氮、ＦｅＳ２和ＦｅＳｏ４的复合膜,从而起到抗磨减摩作用。     

水溶性含氮硼酸酯摩擦学性能研究

利用四球机和环块试验机考察了两种水溶性含氮硼酸酯的摩擦学性能,并用X－射线光电子能谱仪（XPS）对摩擦表面进行了分析,摩擦学试验表明：含氮硼酸酯在水中具有良好的减摩抗磨性能和承载能力,表面分析证实含氮硼酸酯在摩擦过程中发生了摩擦化学反应,生成了含硼酸,三氧化二硼,有机氮等的复合膜,有效地提高了水基液的抗磨减摩性能和承载能力。     

水溶性硼酸酯的摩擦学性能研究

利用四球机和环块试验机考察了一种水溶性硼酸酯在水中的摩擦学性能,并用X射线光电子能谱仪(XPS)和电子探针(EPMA)对摩擦表面进行了分析。摩擦学试验表明水溶性硼酸酯在水中具有良好的润滑性能和承载能力。表面分析证明元素S,N和B在磨斑表面分布比较均匀,且B和S元素发生了摩擦化学反应。水溶性硼酸酯的抗磨作用机理是其在摩擦过程中发生了摩擦化学反应,生成了含硼酸、三氧化二硼、有机氮、二硫化亚铁、硫酸亚铁及摩擦聚合物等的复合膜,有效地提高了水基液的减摩抗磨性能。     

水溶性硼酸酯的摩擦学性能研究

利用四球机和环块试验机考察了一种水溶性硼酸酯在水中的摩擦学性能 ,并用X射线光电子能谱仪 (XPS)和电子探针 (EPMA)对摩擦表面进行了分析。摩擦学试验表明 :水溶性硼酸酯在水中具有良好的润滑性能和承载能力。表面分析证明元素S ,N和B在磨斑表面分布比较均匀 ,且B和S元素发生了摩擦化学反应。水溶性硼酸酯的抗磨作用机理是其在摩擦过程中发生了摩擦化学反应 ,生成了含硼酸、三氧化二硼、有机氮、二硫化亚铁、硫酸亚铁及摩擦聚合物等的复合膜 ,有效地提高了水基液的减摩抗磨性能     

十二烷氧基硼酸镧抗磨减摩添加剂的合成及摩擦学性能研究

合成了十二烷氧基硼酸镧(简称LaDOB)。以十二烷氧基硼酸镧为添加剂，采用四球实验机和环-块摩擦实验机评价了其抗磨减摩性能。结果表明LaDOB使HV1500基础油的抗磨性能得到明显改善，400N负荷下长磨60min时，磨斑直径从基础油的1．76mm降为含添加剂时的0．65mm；其承载能力明显提高，最大无卡咬负荷从基础油的558N增加到含3.0％添加剂时的834N，同时摩擦因数明显降低。X-射线光电子能谱(XPS)分析表明，添加剂在摩擦过程中发生了摩擦化学反应，生成的产物La2O3和B2O3沉积在摩擦副表面，形成抗磨减摩膜，从而改善其摩擦磨损性能。     

十二烷氧基改性硼酸铜的合成及抗磨减摩性能研究

合成了一种新型的油溶性含硼润滑油添加剂———十二烷氧基硼酸铜。采用四球和环-块摩擦磨损试验机评价了其摩擦学性能。结果表明,在HVI500中性矿物油中加入十二烷氧基硼酸铜以后,其承载能力明显提高,磨斑直径和摩擦因数均显著降低。从磨斑表面XPS分析结果可以推断,添加剂在摩擦过程中发生了摩擦化学降解反应,生成的产物Cu2O和B2O3沉积在摩擦表面而起润滑作用,从而改善抗磨减摩性能。     

冠醚化合物对钢/铜和钢/铝摩擦副的抗磨减摩性能研究

本文利用ＳＲＶ摩擦磨损试验机研究了省代苯并－１５－冠醚对钢／铜、钢／铝摩擦副的摩擦磨损性能的影响。结果表明,溴代苯并－１５－冠－５冠醚对钢／铜摩擦副起到减摩抗磨作用,对钢／铝摩擦副起到加速腐蚀磨损的作用。利用ＸＰＳ对磨痕表面进行了分析,发现铜和铝磨痕上发现了Ｂｒ,金属溴化物的生成减少了铜的摩擦和磨损,但却由于腐蚀而加速了铝合金的磨损。     

含硫氮硼酸酯在菜子油中的摩擦学性能研究

合成了一种新型含硫氮硼酸酯润滑油添加剂，利用四球摩擦磨损试验机考察了其在菜子油中的摩擦学性能，并用x射线光电子能谱仪分析了磨斑表面的元素化学状态。结果表明：含硫氮硼酸酯可显著改善菜子油的减摩抗磨性能和承载能力；含上述添加剂的菜子油在摩擦过程中发生了摩擦化学反应，生成了含菜子油甘油酯、有机硫化物、硫酸亚铁、三氧化二硼等组成的边界润滑膜，从而改善了菜子油的摩擦学性能。     

S—P—Mo减摩剂的摩擦磨损性能的研究

本文用四球摩擦磨损试验机、Ｍ－２００型磨机试验机考察了Ｓ－Ｐ－Ｍｏ减摩剂在６８＾＃汽轮机油（简称６８＾＃油）中的减摩抗磨性能；用ＣＬ－１００型齿轮试验机考察了该减摩剂在６８＾＃油中的齿轮承载能力；并用光学显微镜观察了它们的磨斑表面形貌。试验表明，Ｓ－Ｐ－Ｍｏ减摩剂具有良好的减摩抗磨性能，可以大幅度提高６８＾＃油的齿轮承载能力。     

镀锌墨绿色钝化膜的制备与表征

在四酸溶液体系中,加入稳定剂(冰醋酸水溶液)及调色剂(银盐水溶液),对镀锌钢板进行墨绿色钝化处理;用扫描电子显微镜观察了钝化前后膜层的微观形貌,用能谱仪测定了成分,用X射线衍射仪分析了物相组成,用中性盐雾试验测试了耐蚀性。结果表明:未钝化试样表面为完整、粗糙的电镀锌层;钝化后表面变得均匀平整,呈现墨绿色,但有皲裂纹出现;钝化膜主要含铬、氧、磷、硫、锌及少量的铁元素,主要由CrPO4、Cr(OH)3、CrOOH、Cr2O3、Zn(OH)2、2ZnO.CrO3.H2O、Zn3(PO4)2.4H2O和Ag等相组成;镀锌层与钝化膜和铁基体之间的结合均较紧密,没有出现裂纹等缺陷;钝化膜耐中性盐雾腐蚀时间达400 h,满足国家与企业标准的要求。     

Static and Dynamic Properties of Oil Films Containing Organic Polar Compounds on Metal Surfaces,Using Electric Measurements

Using electric measurements, an oil film of liquid paraffin solutions of some surface active compounds was investigated in static, transitional, and dynamic states.

In the static state, the film strength for mechanical deformation depended on the surface active compound in the oil. The adsorbed molecules in the oil film formed a multilayered film causing a mesomorphic state in the oil film. The oil film thickness in the transitional state was reduced by about 30 percent, in comparison with that in the static state. This reduction depended on which surface active compound was added. The film thickness decreased depending on the sliding velocity when it was below 30 cm/sec. The structure of an oil film below 30 cm/sec sliding velocity was considered to be in a dynamic equilibrium between the destruction or disturbance by a mechanical force and the molecular rearrangement or recovery of the structure.     

单轴取向p型半导体CuI薄膜的制备与表征

在室温下用反应沉淀制取了CuI粉体,用溶液生长法在玻璃载体上制备了单轴取向p型半导体CuI薄膜。用XRD、SEM对样品进行了分析,结果表明,CuI粉体为片状结构;晶体薄膜是(111)晶面沿玻璃平行生长的单轴取向马赛克CuI薄膜。阐明了单轴取向CuI薄膜形成的机理。     

Friction and Vibration of Brake Friction Materials Reinforced with Chopped Glass Fibers

A diamond-like carbon (DLC) film exhibits excellent tribological properties. This type of film has an amorphous structure that is generally composed of hydrogen and carbon atoms, and it is the structure of sp²- and sp³-hybridized orbital carbon which brings about the extraordinary tribological properties of the DLC film. It is known that heating causes structural changes in a DLC film, and pre-heat treatment greatly affects the various properties of a DLC film. In this study, we focus on the effects of pre-heat treatment on the friction and wear properties of a hydrogenated DLC film and discuss the structural changes in the film. After pre-heat treatment, the tribological properties were evaluated using a ball-on-disk sliding tester. Our findings indicated that the friction and wear properties of the DLC film were improved by pre-heating up to 500 °C. An as-deposited DLC film had a friction coefficient of approximately 0.15, whereas it was approximately 0.03 for a film pre-heated at 500 °C. The structure of the DLC film was analyzed using micro-laser Raman spectroscopy. The analytic results of the Raman spectroscopy of the film surface showed that the G peak position had shifted toward a higher wave number. This result suggested that hydrogen had evolved from the DLC film because of pre-heat treatment. The half bandwidth of the G peak shifted toward a lower wave number with increases in the pre-heating temperature. This indicated that graphitization of the DLC film had been induced by pre-heat treatment. From these findings, we consider that the hydrogen evolution induced structural changes. Line analysis using micro-laser Raman spectroscopy was performed on a cross section of the pre-heated DLC film. The line analysis showed structural changes which were induced by hydrogen evolution, on the top of the DLC film. On the other hand, hydrogen evolution and graphitization were prevented inside the film, indicating that a gradient structure had been generated by pre-heat treatment. The low friction coefficient of the pre-heated DLC film was caused by graphitization of the DLC film surface. The graphite layer on the top of the film would induce lower shearing resistance at the sliding interface. This gradient structure of the DLC film plays an important role in improving the tribological properties of the pre-heated DLC film.     

Development and application of a new spray impingement model considering film formation in a diesel engine

The present article presents an extension to the computational model for spray/ wall interaction and liquid film processes that has been dealt with in the earlier studies (Lee and Ryou, 2000a). The extensions incorporate film spread due to impingement forces and dynamic motion induced by film inertia to predict the dynamic characteristics of wall films effectively. The film model includes the impingement pressure of droplets, tangential momentum transfer due to the impinging droplets on the film surface and the gas shear force at the film surface. Validation of the spray/ wall interaction model and the film model was carried out for non-evaporative diesel sprays against several sources of experimental data. The computational model for spray/wall interactions was in good agreement with experimental data for both spray radius and height. The film model in the present work was better than the previous static film model, indicating that the dynamic effects of film motion should be considered for wall films. On the overall the present film model was acceptable for prediction of the film radius and thickness.     

铜表面超疏水和超亲油银膜的制备和性能

将铜片置于硝酸银溶液中,通过电交换反应制备了银膜,然后用12-羟基硬脂酸(HSA)进行修饰,在铜表面成功制备了HSA修饰的银膜,并对其形貌、亲水性、亲油性及水接触角的稳定性进行了研究。结果表明:制备的银膜具有微纳米二元结构的树枝晶;经HSA修饰后的银膜具备超疏水性和超亲油性,在水、无水乙醇、丙酮和正己烷中具有良好的稳定性,在空气中放置较长时间后接触角基本保持不变。     

疏水SiO2宽频增透膜的制备与研究

采用溶胶-凝胶浸渍提拉工艺在玻璃表面制备了双层增透膜,该薄膜由折射率分别为1.12和1.33的两层膜构成。薄膜在380~1 100nm和1 100~2 500nm范围内平均透过率较空白玻璃分别提高了7.68%和4.39%。薄膜接触角大约141°,且表层膜在2个月内能保持较高的疏水效果。双层增透膜制备方法简单,在宽光谱耐环境减反射领域有一定的应用潜力。     

Adhesion Between Surfaces Separated by Molecularly Thin Perfluoropolyether Films

The relationship between the adhesion of surfaces separated by a molecularly thin liquid film and the surface energy of the film was investigated. AFM-based force–distance curves were measured on a series of carbon surfaces coated with hydroxyl-terminated perfluoropolyether (PFPE) films. The surface energy of the PFPE films was varied by altering either the total film thickness or the bonding ratio of the film by changing the concentration of the PFPE film in the solution and/or the pull-rate during dip-coating. A linear relationship between adhesion force and surface energy was observed. Adhesion was found to vanish at non-zero values of surface energy. The experimental results indicate that the adhesive force between macroscopic bodies separated by molecularly thin liquid films is linearly proportional to the excess surface energy of the film.     

流体动压润滑油膜厚度及油池的荧光测量

基于面接触润滑油膜厚度荧光测量系统,研究润滑油中荧光剂强度与剪应变率的关系,筛选得到适合油膜厚度测量的润滑油和荧光剂的组合,并研究荧光强度和油膜厚度之间的关系。结果表明:R6G荧光剂和PEG400润滑油组合与Coumarin6荧光剂和PAO8润滑油组合的荧光强度不受剪应变率影响,可用于油膜厚度的荧光测量;荧光强度和油膜厚度存在单值线性关系,通过测量荧光强度可以求解油膜厚度。建立接触区周围油膜厚度及油池分布的测量方法,研究载荷和速度对油膜厚度以及接触区周围润滑剂的迁移特性的影响。结果表明:油膜厚度随速度增加而增加,随载荷增加而减小;随着速度增加,滑块入口处油池产生润滑剂堆积,出口处油池出现双侧脊分离,两侧面油池无明显变化;油池的变化是表面力、机械分离力和离心力综合作用的结果。     

阴极电弧源镀制TiO2薄膜的研究

在真空条件下利用阴极电弧源在不同基底材料上镀制TiO2薄膜.对影响镀膜过程和膜层质量的氧气工作压强、偏压和电流等因素进行研究.经X射线结构分析结果显示TiO2薄膜主要以锐钛矿结构为主及少量的金红石结构.对TiO2薄膜的化学性质、力学性质进行了初步检测.