Results 31 to 40 of about 1,553 (181)
Study of oxide nanoparticles as additives for vegetable lubricants [PDF]
Materials Research, 2014 Currently, vegetable oils have been studied as biolubricants in order to reach new environmental standards. Besides being non-renewable, mineral oils from petroleum bring consequences to the environment due to its low biodegradability.
Marinalva Ferreira Trajano +3 more
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二聚酸抗磨剂对航空煤油润滑性的影响Effects of dimer acid antiwear agent on lubricity of jet fuel
Zhongguo youzhi, 2023 为考察二聚酸抗磨剂对加氢精制航空煤油润滑性的改善作用，同时验证不同二聚酸抗磨剂的改善效果，分别采用桐油、棉籽油及妥尔油酸为原料进行了二聚酸的合成与精制，利用液相色谱仪、红外光谱仪、核磁共振波谱仪等验证了桐油基、棉籽油基及妥尔油酸基二聚酸的分子结构，采用球柱润滑性评定仪（BOCLE）法和高频往复试验机（HFRR）法考察了3种不同原料来源的二聚酸对航空煤油润滑性的改善作用，用显微镜分析试验球的磨痕形貌，并提出抗磨机制。结果表明：随着二聚酸添加量的不断增大，磨痕直径、表面划痕及深度不断减小；在BOCLE法中 ...
张雁玲， 王姝凡， 王宜迪， 杨卫亚， 李澜鹏， 曹长海 ZHANG Yanling, WANG Shufan, WANG Yidi, YANG Weiya, LI Lanpeng, CAO Changhai
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Effect of desulfurization of diesel and its blends with biodiesel on metallic contact [PDF]
Materials Research, 2014 The current environmental scenario has required changes in fuel nature, in order to minimize the harmful effects caused by sulfur in diesel. However, reductions in sulfur content promote loss of its lubricity and consequently wear in the injection system
Valdicleide Silva e Mello +4 more
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Materials Research, 2022 The development of new environmentally-friendly cutting fluids is an important technological advancement. The aim of this study was to assess the tribological behavior of microemulsions (W/O) developed with epoxidized soybean oil and nonionic surfactants
Erinéia da Silva Santos +6 more
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Influence of Succinimide Dispersants on Film Formation, Friction and Antiwear Properties of Zinc Dialkyl Dithiophosphate [PDF]
, 2012 ZDDP (zinc dialkyldithiophosphate) is arguably the most successful antiwear additive ever employed in crankcase engine lubricants. It was originally used as an antioxidant and shortly afterwards recognized for its antiwear and extreme pressure ...
Zhang, Jie, Zhang, Jie
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The Lubricity Analysis of Cutting Fluid Emulsions [PDF]
Materials Research, 2017 The new generation of cutting fluids should have some characteristics, such as low toxicity and biodegradability. A bio-cutting fluid emulsion are an excellent option because they present those properties, as well as good mechanical performance.
Erinéia da Silva Santos +5 more
doaj +2 more sources
Materials Research, 2023 High Chromium Cast Iron (HCCI) has demonstrated its effectiveness as a potential material for applications in severe environments due to its remarkable wear resistance attributed to the volumetric fraction of carbides in the microstructure.
Willian Martins Pasini +10 more
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Micro and nanometric wear evaluation of metal discs used on determination of biodiesel fuel lubricity [PDF]
Materials Research, 2014 The contact of diesel fuel with engine subsystems demands a good wear resistance. Lubricity is an important feature for integrity of injection system and the sulphur composites are primarily responsible for lubrication of the injector nozzle.
Aline Cristina Mendes de Farias +2 more
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Zhongguo youzhi, 2022 为了制备新型柴油抗磨剂，以油酸甲酯、马来酸酐和甲醇为原料，合成了油酸甲酯基琥珀酸单甲酯。采用电喷雾电离质谱、傅里叶红外光谱、核磁共振氢谱、核磁共振碳谱等对油酸甲酯基琥珀酸单甲酯的结构进行表征，采用热重分析法对其热稳定性进行分析，同时采用高频往复试验机法（HFRR）考察其在低硫柴油中的抗磨效果。结果表明：油酸甲酯基琥珀酸单甲酯化合物具有典型的—CC—、—COOH以及—COOCH3结构特征以及良好的热稳定性，可有效改善低硫柴油的润滑性能；在加剂量为200 μg/g时即可使低硫柴油满足润滑性使用要求 ...
夏鑫，蔺建民，李妍，陶志平 XIA Xin， LIN Jianmin， LI Yan， TAO Zhiping
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Impact of molecular structure on the lubricant squeeze-out between curved surfaces with long range elasticity [PDF]
, 2006 The properties of butane (C4H10) lubricants confined between two approaching solids are investigated by a model that accounts for the curvature and elastic properties of the solid surfaces. We consider the linear n-butane and the branched iso-butane. For
B. N. J. Persson +4 more
core +3 more sources