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Lubricants, Volume 13, Issue 4

April 2025 - 56 articles

Cover Story: The following study explores how small laser-textured dimples improve the tribological performance of CoCrMo (CCM) surfaces in artificial hip joints. Arrays of 5 µm diameter dimples were created with varying aspect ratios and surface densities and then tested against UHMWPE counterfaces. The textured surfaces showed up to 60% lower and more stable coefficients of friction, together with reduced wear, compared to untextured or traditionally textured CCM. Among them, low-density dimples performed best by promoting a stable, uniform lubricant film. These results highlight the potential of precise surface texturing to significantly enhance the durability and efficiency of joint replacements. View this paper
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Articles (56)

  • Article
  • Open Access
4 Citations
1,197 Views
17 Pages

In rotating machinery, unbalanced mass is one of the most common causes of system vibration. This paper presents an experimental investigation of the unbalance response of a gas foil bearing-rotor system, based on a 30 kW-rated commercial hydrogen fu...

  • Article
  • Open Access
2 Citations
928 Views
24 Pages

Spherical bearings play a crucial role in maintaining the safety of bridge systems. The frequent operation and wear rate over their lifespan highlight the necessity for methods to improve their tribological performance. In this study, GQZ-60000 unidi...

  • Article
  • Open Access
1 Citations
729 Views
17 Pages

Electrostatic detection is a highly accurate way to monitor system performance failures at an early stage. However, due to the weak electrostatic signal, it can be easily interfered with under complex real-world conditions, leading to a reduction in...

  • Article
  • Open Access
1,082 Views
12 Pages

Predicting the Viscosity of Ester Biolubricants by the Functional Groups of Their Compounds Using a Sensitivity Parameter Model

  • F. Javier Ramos,
  • Juan Carlos de Haro,
  • Juan Francisco Rodríguez,
  • Ángel Pérez and
  • Manuel Carmona

Oleic-based trimethylolpropane (TMP) ester mixtures can be produced via esterification reaction between oleic acid (OA) and TMP, presenting important application as biobased lubricants. In this study, a new mathematical model that allows us to predic...

  • Article
  • Open Access
1 Citations
1,255 Views
14 Pages

Corrosion Resistance of SAE 5160 Steel Deposited by Duplex Simultaneous Treatment with Hastelloy Cathodic Cage

  • Marcos Cristino de Sousa Brito,
  • Juliermes Carvalho Pereira,
  • Lauriene Gonçalves da Luz Silva,
  • Renan Matos Monção,
  • Ediones Maciel de Sousa,
  • Weslley Rick Viana Sampaio,
  • Igor Oliveira Nascimento,
  • Anthunes Íkaro de Araújo,
  • Michelle Cequeira Feitor and
  • Thercio Henrique de Carvalho Costa
  • + 1 author

SAE 5160 steel, classified as high-strength, low-alloy steel, is widely used in the automotive sector due to its excellent mechanical strength and ductility. However, its inherently low corrosion resistance limits its broader application. This study...

  • Article
  • Open Access
2,440 Views
21 Pages

Assessing the Compatibility of PAO and POE with Fluoroelastomer (FKM) for Potential EVs Application

  • Bernardo Tormos,
  • José M. Liñeira Del Río,
  • Adbeel Balaguer and
  • Enrique Giménez

The accelerated growth of electric vehicle (EV) powertrains has prompted the development of specialized fluids that meet stringent thermal and electrical requirements for immersion cooling systems, including interactions with non-metallic components...

  • Article
  • Open Access
2,102 Views
14 Pages

In electric vehicles (EVs), bearings in traction motors are increasingly prone to electrical damage under operational currents and voltages, leading to accelerated wear and reduced lifespan. This study examines the extent of bearing damage under low-...

  • Article
  • Open Access
1 Citations
836 Views
18 Pages

The lubrication behavior and mechanical characteristics of the main bearing area of an aero-engine main shaft bearing determine the reliability and life of the main shaft bearing. In aero-engine main shaft bearings, the lubricant not only plays the r...

  • Article
  • Open Access
994 Views
24 Pages

Effect of Applied Current on Tribological Properties of Polyphenyl Ether

  • Chencheng Wu,
  • Renguo Lu,
  • Hiroshi Tani,
  • Shinji Koganezawa,
  • Xujun Liu and
  • Peihong Cong

The widespread adoption of electric vehicles (EVs) has introduced new challenges in drivetrain lubrication, particularly concerning electrical corrosion, frictional wear, and hydrogen embrittlement. While polyalphaolefin (PAO)-based lubricants are co...

  • Article
  • Open Access
1 Citations
974 Views
33 Pages

Tribological Behaviors and Statistical Experimental Design of Sintered and Age-Hardened Aluminum–Copper Based Composites

  • Ileana Nicoleta Popescu,
  • Badriyah Alhalaili,
  • Florina Violeta Anghelina,
  • Claudiu Nicolicescu and
  • Ruxandra Vidu

This paper reports on the influence of various processing parameters and different SiCp proportions on the outcome of mechanical, tribological, microstructural, and microcompositional investigations of Al-Cu based composites used as potential brake f...

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Lubricants - ISSN 2075-4442