INTERDISCIPLINARY ADVANCES IN TRIBOTESTING: FROM LUBRICATION STRATEGIES TO ENGINE WEAR ASSESSMENT

Authors

  • Aiman Yahaya Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
  • Syahrullail Samion Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
  • Syazwan Hanafi Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
  • Mohd Azman Abas Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
  • Mohd Fadzli Abdollah Faculty of Mechanical Technology and Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia
  • Hilmi Amiruddin Faculty of Mechanical Technology and Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia
  • Nurin Wahidah Mohd Zulkifli Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, 50603 Kuala Lumpur, Malaysia

DOI:

https://doi.org/10.11113/jurnalteknologi.v88.22467

Keywords:

Tribotester, friction, wear, automotive engine, test rig

Abstract

Engine tribotesters were developed using a variety of tribological analysis approaches, and this article gives a thorough description of these approaches. Improving the efficiency and longevity of engines relies heavily on lubrication, friction, and the study of wear and friction. In order to correctly replicate real-world engine conditions, this study takes a look at the many analytical methodologies used to build and evaluate tribotesters. The article discusses several methods for simulating engine tribological phenomena, including pin-on-disk, reciprocating, fourball and journal bearing, and outlines their benefits and drawbacks. To further assess wear processes and material characteristics subjected to tribological stress, we investigate recent developments in oil modification methods such as applying an alternative lubricant and the use of additives in lubricant. In order to increase engine performance and lifetime, this paper highlights the significance of using approaches from interdisciplinary tribological investigations to promote the development of engine tribotesters.

References

Ciulli, E. 2019. Tribology and Industry: From the Origins to 4.0. Frontiers in Mechanical Engineering. 5: 55.

Xu, L. D., E. L. Xu, and L. Li. 2018. Industry 4.0: State of the Art and Future Trends. International Journal of Production Research. 56(8): 2941–2962.

Coulomb, M. 1782. Théorie des Machines Simples. Paris: Imprimerie de Moutard.

Reynolds, O. 1885. On the Theory of Lubrication and Its Application to Mr. Beauchamp Tower's Experiments, Including an Experimental Determination of the Viscosity of Olive Oil. Philosophical Transactions of the Royal Society. 1: 157.

Popova, E., and V. L. Popov. 2015. On the History of Elastohydrodynamics: The Dramatic Destiny of Alexander Mohrenstein-Ertel and His Contribution to the Theory and Practice of Lubrication. ZAMM – Journal of Applied Mathematics and Mechanics. 95 (7): 652–663.

Morales-Espejel, G. E., and A. W. Wemekamp. 2008. Ertel–Grubin Methods in Elastohydrodynamic Lubrication: A Review. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 222(1): 15–34.

Dowson, D. 1966. Elastohydrodynamic Lubrication: The Fundamentals of Roller and Gear Lubrication. Oxford, UK: Pergamon Press.

Jost, H. P. 1966. Lubrication (Tribology): Education and Research; Report on the Present Position and Industry's Needs. London: HM Stationery Office.

Hamrock, B. J., and D. Dowson. 1981. Ball Bearing Lubrication: The Elastohydrodynamics of Elliptical Contacts. New York: Wiley-Interscience.

Moon, F. C. 2008. Superconducting Levitation: Applications to Bearings and Magnetic Transportation. Hoboken, NJ: John Wiley & Sons.

Bhushan, B. 1999. Principles and Applications of Tribology. London: John Wiley & Sons.

International Science Group (ISG). 2020. Theoretical Aspects of Modern Engineering. Vol. 1.

Sani, A., A. Sahab, E. Abd Rahim, N. Talib, K. Kamdani, and M. Z. Rahim. 2017. Performance Evaluation of Palm-Olein TMP Ester Containing Hexagonal Boron Nitride and an Oil Miscible Ionic Liquid as Bio-Based Metalworking Fluids. Journal of Mechanical Engineering (JMechE.) 1: 223–234.

Azman, N. F., S. Samion, and M. N. H. M. Sot. 2018. Investigation of Tribological Properties of CuO/Palm Oil Nanolubricant Using Pin-on-Disc Tribotester. Green Materials. 6(1): 30–37.

Zulhanafi, P., and S. Syahrullail. 2019. The Tribological Performances of Super Olein as Fluid Lubricant Using Four-Ball Tribotester. Tribology International. 130: 85–93.

Kziazyk, T., E. Gavignet, P. H. Cornuault, P. Baucour, and D. Chamagne. 2023. Review on Test Benches Studying Sliding Electrical Contact and Synthesis of Experimental Results. Energies. 16(3): 1294.

Zhang, Y., C. Li, X. Pang, C. Song, F. Ni, and Y. Zhang. 2021. Evolution Processes of the Tribological Properties in Pantograph/Catenary System Affected by Dynamic Contact Force during Current-Carrying Sliding. Wear. 477: 203809.

Jabal, M. H., F. N. Ani, and S. Syahrullail. 2014. The Tribological Characteristic of the Blends of RBD Palm Olein with Mineral Oil Using Four-Ball Tribotester. Jurnal Teknologi. 69(6): 11–14.

Derosa, S., P. Nåvik, A. Collina, G. Bucca, and A. Rønnquist. 2021. Contact Point Lateral Speed Effects on Contact Strip Wear in Pantograph–Catenary Interaction for Railway Operations under 15 kV 16.67 Hz AC Systems. Wear. 486: 204103.

Bucca, G., and A. Collina. 2015. Electromechanical Interaction between Carbon-Based Pantograph Strip and Copper Contact Wire: A Heuristic Wear Model. Tribology International. 92: 47–56.

Rasep, Z., M. M. Yazid, and S. Samion. 2021. Lubrication of Textured Journal Bearing by Using Vegetable Oil: A Review of Approaches, Challenges, and Opportunities. Renewable and Sustainable Energy Reviews. 146: 111191.

Golshokouh, I., M. Golshokouh, F. N. Ani, E. Kianpour, and S. Syahrullail. 2013. Investigation of Physical Properties for Jatropha Oil at Different Temperatures as Lubricant Oil. Life Science Journal. 10(8): 110–119.

Golshokouh, I., S. Syahrullail, F. N. Ani, and H. H. Masjuki. 2014. Investigation of Palm Fatty Acid Distillate Oil as an Alternative to Petrochemical-Based Lubricant. Journal of Oil Palm Research. 26(1): 25–36.

Afifah, A. N., S. Syahrullail, N. I. W. Azlee, and A. M. Rohah. 2021. Synthesis and Tribological Studies of Epoxidized Palm Stearin Methyl Ester as a Green Lubricant. Journal of Cleaner Production. 280: 124320.

Aiman, Y., S. Syahrullail, and M. K. A. Hamid. 2022. Optimisation of Friction Surfacing Process Parameters for A1100 Aluminium Utilising Different Derivatives of Palm Oil Based on Closed Forging Test. Biomass Conversion and Biorefinery. 1–18.

Yahaya, A., S. Samion, U. Abidin, and M. K. Abdul Hamid. 2023. Different Behaviors of Friction in Open and Closed Forging Test Utilizing Palm Oil-Based Lubricants. Lubricants. 11(3): 114.

Holmberg, K., P. Andersson, and A. Erdemir. 2012. Global Energy Consumption Due to Friction in Passenger Cars. Tribology International. 47: 221–234.

Zhang, Y., Y. Zhang, and C. Song. 2018. Arc Discharges of a Pure Carbon Strip Affected by Dynamic Contact Force during Current-Carrying Sliding. Materials. 11(5): 796.

La, D. D., T. N. Truong, T. Q. Pham, H. T. Vo, N. T. Tran, T. A. Nguyen, and D. D. Nguyen. 2020. Scalable Fabrication of Modified Graphene Nanoplatelets as an Effective Additive for Engine Lubricant Oil. Nanomaterials. 10(5): 877.

Syahrullail, S., K. Nakanishi, and S. Kamitani. 2005. Investigation of the Effects of Frictional Constraint with Application of Palm Olein Oil Lubricant and Paraffin Mineral Oil Lubricant on Plastic Deformation by Plane Strain Extrusion. Japanese Journal of Tribology. 50(6): 727–738.

Syahrullail, S., J. Y. Wira, W. B. Wan Nik, and W. N. Fawwaz. 2013. Friction Characteristics of RBD Palm Olein Using Four-Ball Tribotester. Applied Mechanics and Materials. 315: 936–940.

Abdul Sani, A. S., E. A. Rahim, and S. Samion. 2017. Tribological Performance of Modified Jatropha Oil Containing Oil-Miscible Ionic Liquid for Machining Applications. Journal of Mechanical Science and Technology. 31: 5675–5685.

Syahrullail, S., N. Nuraliza, M. I. Izhan, M. A. Hamid, and D. M. Razaka. 2013. Wear Characteristic of Palm Olein as Lubricant at Different Rotating Speeds. Procedia Engineering. 68: 158–165.

Mujtaba, M. A., M. A. Kalam, H. H. Masjuki, M. E. M. Soudagar, H. M. Khan, H. Fayaz, and L. Razzaq. 2021. Effect of Palm–Sesame Biodiesel Fuels with Alcoholic and Nanoparticle Additives on Tribological Characteristics of Lubricating Oil by Four-Ball Tribo-Tester. Alexandria Engineering Journal. 60(5): 4537–4546.

Gul, M., N. W. M. Zulkifli, H. H. Masjuki, M. A. Kalam, M. A. Mujtaba, M. H. Harith, and A. B. Farooq. 2020. Effect of TMP-Based Cottonseed Oil Biolubricant Blends on Tribological Behavior of Cylinder Liner–Piston Ring Combinations. Fuel. 278: 118242.

Lin, Z., T. Qu, K. Zhang, Q. Zhang, S. Wang, G. Wang, and G. Fan. 2023. Modeling of Contact Temperatures and Their Influence on the Tribological Performance of PEEK and PTFE in a Dual Pin-on-Disk Tribometer. Friction. 11(4): 546–566.

Saikko, V., O. Morad, and R. Viitala. 2021. Friction RandomPOD—A New Method for Friction Measurement in Noncyclic, Multidirectional, Dynamic Pin-on-Disk Tests for Orthopaedic Bearing Materials. Journal of Biomechanics. 118: 110273.

Wu, J., T. Liu, N. Yu, J. Cao, K. Wang, and K. Sørby. 2021. A Pin-on-Disk Tribometer for Friction and Lubricating Performance in mm-Scale. Tribology Letters. 69: 1–6.

Kim, D. J., H. Kang, C. H. Song, J. Y. Oh, J. W. Cho, and J. Rostami. 2021. Design of Pin-on-Disk Type Abrasion Testing Machine for Durability Assessment of Rock Cutting Tools. International Journal of Precision Engineering and Manufacturing. 22(7): 1249–1270.

Sharma, U. C., and S. Sachan. 2019. Friction and Wear Behavior of Karanja Oil Derived Biolubricant Base Oil. SN Applied Sciences. 1: 1–11.

Karin, P., P. Chammana, P. Oungpakornkaew, P. Rungsritanapaisan, W. Amornprapa, C. Charoenphonphanich, and K. Sriprapha. 2022. Impact of Soot Nanoparticle Size and Quantity on Four-Ball Steel Wear Characteristics Using EDS, XRD and Electron Microscopy Image Analysis. Journal of Materials Research and Technology. 16: 1781–1791.

Aiman, Y., and S. Syahrullail. 2017. Development of Palm Oil Blended with Semi-Synthetic Oil as a Lubricant Using Four-Ball Tribotester. Jurnal Tribologi.13: 1–20.

Ali, Z. A. A. A., A. M. Takhakh, and M. Al-Waily. 2022. A Review of Use of Nanoparticle Additives in Lubricants to Improve Their Tribological Properties. Materials Today: Proceedings. 52: 1442–1450.

Ayerdi, J. J., A. Aginagalde, I. Llavori, J. Bonse, D. Spaltmann, and A. Zabala. 2021. Ball-on-Flat Linear Reciprocating Tests: Critical Assessment of Wear Volume Determination Methods and Suggested Improvements for ASTM D7755 Standard. Wear. 470: 203620.

Michelberger, B., D. Jaitner, A. Hagel, P. Striemann, B. Kroeger, A. Leson, and A. F. Lasagni. 2021. Combined Measurement and Simulation of Piston Ring–Cylinder Liner Contacts with a Reciprocating Long-Stroke Tribometer. Tribology International. 163: 107146.

Carrera-Espinoza, R., U. Figueroa-López, J. Martínez-Trinidad, I. Campos-Silva, E. Hernández-Sánchez, and A. Motallebzadeh. 2016. Tribological Behavior of Borided AISI 1018 Steel under Linear Reciprocating Sliding Conditions. Wear. 362: 1–7.

Ye, J., H. Zhang, X. Liu, and K. Liu. 2017. Low-Wear Steel Counterface Texture Design: A Case Study Using Micro-Pits Texture and Alumina–PTFE Nanocomposite. Tribology Letters. 65: 1–12.

Zhou, G., J. Qiao, W. Pu, and P. Zhong. 2022. Analysis of Mixed Lubrication Performance of Water-Lubricated Rubber Tilting Pad Journal Bearing. Tribology International. 169: 107423.

Zulhanafi, P., S. Syahrullail, and M. A. Ahmad. 2020. The Tribological Performance of Hydrodynamic Journal Bearing Using Bio-Based Lubricant. Tribology in Industry. 42(2): 278.

Quinci, F., W. Litwin, M. Wodtke, and R. van Den Nieuwendijk. 2021. A Comparative Performance Assessment of a Hydrodynamic Journal Bearing Lubricated with Oil and Magnetorheological Fluid. Tribology International. 162: 107143.

Meng, Y., J. Xu, Z. Jin, B. Prakash, and Y. Hu. 2020. A Review of Recent Advances in Tribology. Friction. 8: 221–300.

Marian, M., and S. Tremmel. 2021. Current Trends and Applications of Machine Learning in Tribology—A Review. Lubricants. 9(9): 86.

Shafi, W. K., and M. S. Charoo. 2021. An Overall Review on the Tribological, Thermal and Rheological Properties of Nanolubricants. Tribology – Materials, Surfaces & Interfaces. 15(1): 20–54.

Penkov, O. V., M. Khadem, A. Nieto, T. H. Kim, and D. E. Kim. 2017. Design and Construction of a Micro-Tribotester for Precise In-Situ Wear Measurements. Micromachines. 8(4): 103.

Kim, C. L., and Y. G. Sung. 2019. Design of a Tribotester Based on Non-Contact Displacement Measurements. Micromachines. 10(11): 748.

Liu, G., X. Li, Y. Li, Y. Li, C. Cao, Z. Wang, and M. Zhu. 2023. A Comparison of Wear between Unidirectional and Reciprocating Sliding Motions under Different Applied Loads and Lubricants. Physica Scripta. 98(11): 115930.

Kuwahara, T., P. A. Romero, S. Makowski, V. Weihnacht, G. Moras, and M. Moseler. 2019. Mechano-Chemical Decomposition of Organic Friction Modifiers with Multiple Reactive Centres Induces Superlubricity of ta-C. Nature Communications. 10(1): 151.

Sivaprakasam, P., T. Hailu, and G. Elias. 2023. Experimental Investigation on Wear Behavior of Titanium Alloy (Grade 23) by Pin-on-Disc Tribometer. Results in Materials. 19: 100422.

Chen, L., H. An, P. Zhen, and M. Liu. 2021. Evaluation of Tribological Properties of Hydraulic Oils by Four-Ball Tester Based on Orthogonal Experiment Method. Journal of Physics: Conference Series. 1748(6): 062061.

R. 2022. Four Ball Tribometer: To Determine the Lubricating Properties of Oils and Greases. Industrial Lubricants. March 22.

Abdullah, M. H., and S. A. Ibrahim. 2021. Tribological Behaviour of Bio-Lubricants for Machinery Using a Four-Ball Tribotester. Progress in Engineering Application and Technology. 2(2): 1038–1050.

Berglund, K., M. Rodiouchkina, J. Hardell, K. Kalliorinne, and J. Johansson. 2021. A Novel Reciprocating Tribometer for Friction and Wear Measurements with High Contact Pressure and Large Area Contact Configurations. Lubricants. 9(12): 123.

Quinci, F., W. Litwin, M. Wodtke, and R. van Den Nieuwendijk. 2021. A Comparative Performance Assessment of a Hydrodynamic Journal Bearing Lubricated with Oil and Magnetorheological Fluid. Tribology International. 162: 107143.

Cecilia, J. A., D. Ballesteros Plata, R. M. Alves Saboya, F. M. Tavares de Luna, C. L. Cavalcante Jr., and E. Rodríguez-Castellón. 2020. An Overview of the Biolubricant Production Process: Challenges and Future Perspectives. Processes. 8(3): 257.

Uppar, R., P. Dinesha, and S. Kumar. 2023. A Critical Review on Vegetable Oil-Based Bio-Lubricants: Preparation, Characterization, and Challenges. Environment, Development and Sustainability. 25(9): 9011–9046.

Zhang, Y., H. N. Li, C. Li, C. Huang, H. M. Ali, X. Xu, and Z. Said. 2022. Nano-Enhanced Biolubricant in Sustainable Manufacturing: From Processability to Mechanisms. Friction. 10(6): 803–841.

Yahaya, W. M. A. W., M. A. Dandan, and S. Samion. 2018. The Effect of Fluidity of Palm Kernel Oil with Pour Point Depressant on Coefficient of Friction Using Four-Ball Tribotester. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences. 50(2): 97–107.

Durango-Giraldo, G., C. Zapata-Hernandez, J. F. Santa, and R. Buitrago-Sierra. 2022. Palm Oil as a Biolubricant: Literature Review of Processing Parameters and Tribological Performance. Journal of Industrial and Engineering Chemistry. 107: 31–44.

Singh, Yashvir, and Erween Abd Rahim. 2020. Michelia Champaca: Sustainable Novel Non-Edible Oil as Nano-Based Bio-Lubricant with Tribological Investigation. Fuel. 282: 118830.

Taylor, R. I., and R. C. Coy. 2000. Improved Fuel Efficiency by Lubricant Design: A Review. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 214(1): 1–15.

Kim, D. J., H. Kang, C. H. Song, J. Y. Oh, J. W. Cho, and J. Rostami. 2021. Design of Pin-on-Disk Type Abrasion Testing Machine for Durability Assessment of Rock Cutting Tools. International Journal of Precision Engineering and Manufacturing. 22(7): 1249–1270.

Khalafvandi, S. A., M. A. Pazokian, and E. Fathollahi. 2022. The Investigation of Viscometric Properties of the Most Reputable Types of Viscosity Index Improvers in Different Lubricant Base Oils: API Groups I, II, and III. Lubricants. 10(1): 6.

Wolak, A., G. Zając, and T. Słowik. 2021. Measuring Kinematic Viscosity of Engine Oils: A Comparison of Data Obtained from Four Different Devices. Sensors. 21(7): 2530.

Martini, A., U. S. Ramasamy, and M. Len. 2018. Review of Viscosity Modifier Lubricant Additives. Tribology Letters. 66: 1–14.

Zhang, W., et al. 2020. Modification and Synthesis of Low Pour Point Plant-Based Lubricants with Ionic Liquid Catalysis. Renewable Energy. 153: 1320–1329.

Murru, C., R. Badía-Laíño, and M. E. Díaz-García. 2021. Oxidative Stability of Vegetal Oil-Based Lubricants. ACS Sustainable Chemistry & Engineering. 9(4): 1459–1476.

Sun, J., and S. Du. 2019. Application of Graphene Derivatives and Their Nanocomposites in Tribology and Lubrication: A Review. RSC Advances. 9(69): 40642–40661.

Liu, Q., J. Fu, Z. Liu, and J. Liu. 2021. An Approach for Waste Heat Recovery of Internal Combustion Engine: In-Cylinder Steam-Air Expansion. Applied Thermal Engineering. 197: 117394.

Tormos, B., J. Martín, D. Blanco-Cavero, and A. J. Jiménez-Reyes. 2020. One-Dimensional Modeling of Mechanical and Friction Losses Distribution in a Four-Stroke Internal Combustion Engine. Journal of Tribology. 142(1): 011703.

Zöldy, M. 2021. Engine Oil Test Method Development. Tehnički Vjesnik. 28(3): 1012–1016.

Woydt, M., and N. Kelling. 2003. Testing the Tribological Properties of Lubricants and Materials for the System ‘Piston Ring/Cylinder Liner’ outside of Engines. Industrial Lubrication and Tribology. 55(5): 213–222.

Wang, J., H. Li, K. Grinkevych, R. Huang, J. Xu, G. Tsybanov, and I. Tkachenko. 2021. Cyclic Indentation Method Applied to Evaluating Surface Degradation of Cylinder-Piston Group Parts. Strength of Materials. 1–9.

Yin, H., X. Zhang, Z. Guo, Y. Xu, X. Rao, and C. Yuan. 2023. Synergetic Effects of Surface Textures with Modified Copper Nanoparticles Lubricant Additives on the Tribological Properties of Cylinder Liner–Piston Ring. Tribology International. 178: 108085.

Dellis, P. S. 2019. Oil Film Thickness Measurements Combined with High Temperature Friction Investigations in a Simplified Piston-Ring Lubrication Test Rig. Tribology in Industry. 41(4): 471.

Zavos, A. 2021. Effect of Coating and Low Viscosity Oils on Piston Ring Friction under Mixed Regime of Lubrication through Analytical Modelling. Lubricants. 9(12): 124.

Atulkar, A., R. K. Pandey, and P. M. V. Subbarao. 2021. Role of Textured Piston Rings/Liners in Improving the Performance Behaviours of IC Engines: A Review with Vital Findings. Surface Topography: Metrology and Properties. 9(2): 023002.

Ferreira, R., J. Martins, Ó. Carvalho, L. Sobral, S. Carvalho, and F. Silva. 2020. Tribological Solutions for Engine Piston Ring Surfaces: An Overview on the Materials and Manufacturing. Materials and Manufacturing Processes. 35(5): 498–520.

Bathe, R. N., G. Padmanabham, S. Thirumalini, and R. Vaira Vignesh. 2021. Impact of Laser Surface Texturing (LST) on the Tribological Characteristics of Piston Rings and Cylinder Liners—A Review. Part 1: Development of LST Technology. Transactions of the IMF. 99(5): 231–237.

Zhang, Z., J. Liu, and Y. Xie. 2016. Design Approach for Optimization of a Piston Ring Profile Considering Mixed Lubrication. Friction. 4: 335–346.

Razavykia, A. 2019. Predictive Modeling of Piston Ring Assembly and Connecting Rod Bearing Lubrication and Tribological Performance. PhD diss., Politecnico di Torino.

Shahabuddin, M., M. Mofijur, I. R. Fattah, M. A. Kalam, H. H. Masjuki, M. A. Chowdhury, and N. Hossain. 2022. Study on the Tribological Characteristics of Plant Oil-Based Bio-Lubricant with Automotive Liner–Piston Ring Materials. Current Research in Green and Sustainable Chemistry. 5: 100262.

Amiril, S. A. S., E. A. Rahim, Z. Embong, and S. Syahrullail. 2018. Tribological Investigations on the Application of Oil-Miscible Ionic Liquids Additives in Modified Jatropha-Based Metalworking Fluid. Tribology International. 120: 520–534.

Ruggiero, A., R. D’Amato, M. Merola, P. Valášek, and M. Müller. 2016. On the Tribological Performance of Vegetal Lubricants: Experimental Investigation on Jatropha Curcas L. Oil. Procedia Engineering. 149: 431–437.

Ali, M. K. A., X. Hou, and M. A. Abdelkareem. 2020. Anti-Wear Properties Evaluation of Frictional Sliding Interfaces in Automobile Engines Lubricated by Copper/Graphene Nanolubricants. Friction. 8: 905–916.

Syahir, A. Z., N. W. M. Zulkifli, H. H. Masjuki, M. A. Kalam, M. H. Harith, M. N. A. M. Yusoff, and M. Jamshaid. 2020. Tribological Improvement Using Ionic Liquids as Additives in Synthetic and Bio-Based Lubricants for Steel–Steel Contacts. Tribology Transactions. 63(2): 235–250.

Wan Nik, W. B., M. A. Maleque, F. N. Ani, and H. H. Masjuki. 2007. Experimental Investigation on System Performance Using Palm Oil as Hydraulic Fluid. Industrial Lubrication and Tribology. 59(5): 200–208.

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2026-02-27

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