石墨材料与石墨轴承

阐述了石墨作为润滑材料在制造石墨轴承方面的基理和简要生产过程,分析了炭石墨轴承、青铜石墨含油轴承、镶嵌石墨轴承的技术性能和特点,讨论了石墨润滑轴承的应用发展前景。     

固体润滑材料--石墨的应用

简述石墨材料的润滑基理,介绍石墨润滑的应用、研究与探索。     

石墨材料与石墨轴承

阐述了石墨作为润滑材料在制造石墨轴承方面的机理和简要生产过程，分析了炭石墨轴承、青铜石墨含油轴承、镶嵌石墨轴承的技术性能和特点，讨论了石墨润滑轴承的应用发展前景。     

炭石墨固体润滑材料的设计与应用

炭石墨材料在润滑领域的应用已得到新的发展。通过对炭石墨润滑材料的新设计，如通过添加不同组份或使用不同工艺，能赋予其新的性能，拓宽应用范围。经过对炭石墨材料的润滑设计、应用环境的分析和讨论，介绍了当前炭石墨润滑材料现状与发展。     

碳石墨材料在无纺布热轧机上的应用

浸锑碳石墨是一种具有良好自润滑性，耐高温，线膨胀系数小，摩擦系数低的固体润滑材料，它可在高速、高压或低速重载工况条件下工作。本文介绍浸渍金属锑的碳石墨轴承在无纺布热轧机上的应用以及在该系统中热油泵密封，旋转接头等部件采用浸锑石墨材料所取得的良好效果，解决了高温润滑难题，取得了良好的经济效益。     

石墨基固体润滑复合涂料的研究与应用现状

简述了石墨的结构性能与功用,综述了石墨涂料润滑剂与固体润滑复合涂层的研究与应用现状,介绍了石墨固体润滑涂层的主要应用领域和产品种类,分析了石墨固体润滑涂层的技术瓶颈,展望了石墨-聚合物固体润滑复合涂层的发展方向。     

石墨材料在无油润滑领域的应用研究

采用石墨为主要原料,添加适量的二硫化钼和氟化石墨,制成高效固体润滑材料,应用于无油润滑轴承中,其各项性能指标达到日本Ｓａｎｋｙｏ公司和Ｏｉｌｌｅｓｓ公司同类产品的水平。     

不同载荷条件下浸银石墨材料水润滑摩擦磨损性能研究

采用环-块式摩擦磨损实验机,研究了水润滑条件下不同载荷和滑动时间对浸银石墨材料摩擦磨损性能的影响,利用表面轮廓仪和扫描电子显微镜对浸银石墨材料在磨合阶段和稳定磨损阶段的磨损行为进行分析和探讨。结果表明:滑动时间1 h内为磨合阶段,随载荷增加浸银石墨在水润滑条件下的摩擦系数降低,比磨损率增大。滑动时间5 h达到了稳定磨损阶段,高载荷导致浸银石墨在水润滑条件下的摩擦系数和比磨损率降低。在浸银石墨的稳定磨损阶段,500 N载荷下的摩擦系数最低,为0.038,700 N载荷下的比磨损率最低,为2.26×10^(-7)mm^(3)/Nm。高载荷条件下,浸银石墨在磨合阶段和稳定磨损阶段展现出相似的磨损机制,浸银石墨表面石墨区域发生较大磨损,增强的银颗粒支撑了水润滑界面间的载荷作用,边界润滑状态的局部流体润滑作用和小尺寸磨屑的自润滑作用,降低了浸银石墨材料的摩擦系数和比磨损率。     

M130炭-石墨材料及其浸银处理后在热动力鱼雷中的应用

以超细石油焦粉为主要成分,加入适当润滑和耐磨材料制成的Ｍ１３０焙烧品经中温处理后再用热等静压机进行高温、高压浸银,得到具有高强、抗热、润滑、耐磨、密封等综合性能的Ｍ２３０Ｇ浸银炭－石墨材料。简述了Ｍ２３０Ｇ浸银炭－石墨材料在热动力鱼雷中的应用。     

炭石墨材料/铜滑动摩擦的理论研究和电刷磨损的影响因素

综述了与炭石墨材料／铜滑动摩擦相关的吸附润滑理论、氧化膜润滑理论、通电磨损理论、电接触理论、换向理论和炭石墨材料疲劳磨损机理理论，并对电刷磨损的影响因素进行了探讨。指出了滑动摩擦理论存在的不足之处，有待完善，对此的进一步研究必将对改进滑动摩擦材料的生产工艺、提高产品性能产生重要的影响。     

聚四氟乙烯及其石墨填充复合材料的摩擦磨损特性

对聚四氟乙烯（PTFE）及石墨填充PTFE复合材料在不同载荷、不同润滑条件下,以及在不同对磨时间内的摩擦磨损性能进行了研究。结果表明,石墨填充PTFE的耐磨性比纯PTFE提高很多,不同的润滑条件对PTFE和石墨填充PTFE的磨损量及摩擦系数的影响不一样,对纯PTFE,其磨损量在水润条件下较小,而对石墨填充PTFE,其磨损量在油润滑条件下较小。     

Sliding-wear resistance of liquid-phase-sintered SiC containing graphite nanodispersoids

The influence was investigated of a graphite nanodispersoid addition on the lubricated sliding-wear behaviour of liquid-phase-sintered (LPS) SiC ceramics fabricated by spark-plasma sintering (SPS). The graphite nanodispersoids, introduced into the microstructure of the LPS SiC ceramic to act as self-lubricating phase, were obtained by graphitization of diamond nanoparticles during the SPS. It was found that the graphite nanodispersoid addition results in a lower resistance to mild wear, attributable to the lower hardness of graphite and the null lubrication it provides. Moreover, the graphite nanodispersoids, which mostly locate at grain boundaries/faces, worsen the cohesion of SiC grains, contributing together with the higher mild-wear rate to an early transition to the severe-wear stage. On the contrary, the graphite nanodispersoids were effective at improving the resistance to severe wear because they increase the fracture toughness while providing some external lubrication. Relevant implications for the microstructural design of advanced triboceramics are discussed.     

Carburization and wear behavior of self-lubricating Ti(C,N)-based cermets with various secondary carbides

Self-lubricating Ti(C,N)-based cermets were manufactured using vacuum sintering and solid carburizing in this study, and the effects of various carbides on the carburization and wear behavior of the cermets were investigated. The findings demonstrate that solid carburizing resulted in strong graphite precipitation in all the Ti(C,N)-based matrices. Refractory carbides significantly affect the morphological characteristics of graphite in cermets. The activated carbon atoms in the cermet matrix are consumed in two ways: rearrangement followed by precipitation in the form of graphite and combination with metal atoms followed by precipitation in the form of carbides or carbonitrides. As the amount of refractory carbide dissolved in the binder phase increases, more carbon atoms are consumed by bonding with metal atoms, and less graphite is precipitated. The precipitation of carbides and carbonitrides in the ceramic phase increases the rim phase thickness. After carburization, the mechanical properties of the cermets were noticeably degraded owing to the introduction of graphite and the coarsening of ceramic particles. However, the presence of graphite significantly reduced the friction coefficient of the cermet material owing to its good lubrication effect. The decreased mass loss and better wear morphology suggest that the wear deterioration of all the cermets is remarkably mitigated by carburization. The wear properties of cermets are determined by the mechanical properties and the lubrication conditions of the contact surfaces, and good lubrication conditions can partially compensate for the degradation of the mechanical properties of cermets in the sliding wear process.     

Effects of Ti2SnC on the mechanical properties and tribological properties of copper/graphite composites

Copper/graphite composites and copper/graphite/Ti₂SnC composites were fabricated through the process of ball-milling, pressing and sintering. The effects of Ti₂SnC as the second lubrication component on the mechanical properties, wear resistance and lubrication properties of copper/graphite composites were studied in this paper. The results showed that copper/graphite/Ti₂SnC composites had better hardness, impact toughness, wear resistance and lubrication performance than copper/graphite composites. The optimum values of hardness, impact toughness, friction coefficient and wear rate of copper/graphite/Ti₂SnC composites were, respectively, 56 HSD, 1.8J/cm², 0.15, 9.126 × 10^?6 mm³/N·m, while these were only 45 HSD, 1.2 J/cm², 0.17, 3.534 × 10^?4 mm³/N·m of copper/graphite composites.     

纳米石墨在液态介质中分散行为的研究进展

介绍了纳米石墨的结构、几种常见的制备方法,着重阐述了纳米石墨在液态介质中的分散行为以及进行亲水、亲油改性后在润滑领域的应用,最后展望了纳米石墨改性研究的发展前景并指出了进一步的研究方向。     

纳米氟化镧对生物质燃油碳烟颗粒流润滑特性影响

为探索极端乏油工况下碳烟颗粒在发动机摩擦副界面的功效及润滑油添加剂的作用,本文采用往复摩擦磨损试验机研究了纳米氟化镧（nano-LaF₃）颗粒对往复滑动条件下生物质燃油碳烟（BS）颗粒流润滑性能的影响。借助拉曼光谱仪、3D激光扫描显微镜、X射线光电子能谱仪等仪器探讨了滑动条件下nano-LaF₃对BS颗粒流润滑特性的影响作用机理。结果表明：当nano-LaF₃的添加质量分数大于20%时能显著改善往复滑动条件下BS颗粒的抗磨减摩性能,并且随着nano-LaF₃添加浓度的增大,摩擦表面碳烟石墨化程度和石墨微晶尺寸均增大。nano-LaF₃在含BS颗粒流润滑的摩擦界面形成了LaF₃摩擦膜以及含镧化合物、碳氧化合物及铁氧化合物的化学复合反应膜,同时nano-LaF₃会加大诱导碳烟的石墨化作用,从而增强了BS颗粒流润滑的减摩性。     

Electrostatic performance of various lubricant powders in P/M electrostatic die wall lubrication

Electrostatic die wall lubrication is an advanced lubrication technique in the production of machinery parts of powder metallurgy. Electrostatic performance of lubricants is one of key factors for successful operation. Among electrostatic parameters, the charge-to-mass ratio of dry lubricant powders has been considered to be the most critical factor to make good adhesion between the dry lubricant powders and the inner die wall. This paper investigates electrostatic performances and potential dependences of the charge-to-mass ratios of various single lubricants and lubricant mixtures, such as zinc stearate, W-special wax, EBS wax, graphite and h-boron nitride, and some combinations of these single lubricants. The experimental results indicate that not all of the single lubricants can properly be charged by electrostatic charging. Zinc stearate, h-BN and EBS wax can easily be charged and the charge-to-mass ratios can be obtained up to the proper value (0.2 μC/g) high enough for die wall lubrication practice. For lubricant mixtures, wax combinations show satisfactory electrostatic response and both conducting and insulating lubricant powder additions influence the electrostatic performance of the mixtures significantly. Mechanism of charging is discussed and a quantitative estimation of the ratio is given. Processing variables influencing the charge-to-mass ratios are also discussed.     

酚醛环氧树脂装置薄膜蒸发器运行异常的解决

分析了脱除酚醛环氧树脂半成品中剩余溶剂的过程时,薄膜蒸发器出现的振动过大、声响异常、底部石墨轴承极易损坏等问题的原因,结合其工作原理和结构,通过校正轻微变形的转子、增设设备底部径向支撑结构、安装电机变频器和改善底部石墨轴承的润滑等措施,消除了故障,取得了较好效果。     

固体润滑剂对丁腈橡胶复合材料性能的影响

将石墨、石墨烯以及两种不同尺寸的二硫化钼分别引入丁腈橡胶复合材料,考察四种固体润滑剂对复合材料性能,尤其是摩擦学性能的影响.结果表明,石墨烯的引入使丁腈橡胶复合材料的硬度及模量明显上升,扯断伸长率下降;而二硫化钼的引入有利于提高材料的撕裂性能.在干摩擦条件下,石墨烯的引入可有效提高材料的耐磨性并降低材料的摩擦系数,这得...