Homender Kumar

@pec.ac.in

ASSISTANT PROFESSOR
Punjab Engineering College (Deemed to be University), Chandigarh

Homender Kumar


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https://researchid.co/homenderraj

EDUCATION

Ph.D, M.Tech and B.Tech
9

Scopus Publications

128

Scholar Citations

6

Scholar h-index

6

Scholar i10-index

Scopus Publications

  • Nanotribology: An Introduction and Tribological Insights for Advanced Technological Systems
    Sooraj Singh Rawat, Homender Kumar, Sangita Kumari
    Green Tribology and Industry 4 0 Fundamentals and Sustainable Advancements, 2026
  • Synergistic effects of functionalized h-BN and ionic liquid on tribological performance and thermal stability of PAO-based nanolubricants
    Vikash Kumar Gupta, Bhimraj Singh, Homender Kumar, Shivam Awasthi, Manvandra Kumar Singh, Jitendra Kumar Katiyar, Anita Mohan
    Tribology International, 2026
  • Synthesis and Characterizations of Copper-Based Composite Using Powder Metallurgy Under Variable Compaction Loads
    Manvandra Kumar Singh, Saarthak Dwivedi, Sanjeet Verma, R. K. Gautam, Homender Kumar, Gopal Ji, Vineet Kumar, Uma Shankar, Manish Kumar
    Springer Proceedings in Materials, 2025
  • Tribological evaluation of PAO 100 oil-based lithium greases with chemically functionalized nanoadditives
    Homender Kumar, Harsha A. P., Sooraj Singh Rawat
    Lubrication Science, 2023
    The lubricating greases employed in this study were formulated with polyalphaolefin (PAO) 100 as the base oil and 12‐lithium hydroxystearate as the thickener. The sol–gel method was used to produce the LaF3 nanoadditives. The oleic acid‐treated LaF3 (i.e., OA‐LaF3) and carboxylic acid‐treated MWCNTs (i.e., COOH‐MWCNTs) were blended in the formulated grease samples and used as nanoadditives. The detailed microstructural and chemical properties of chemically treated nanoadditives were investigated using HR‐TEM, XRD, FTIR and XPS analyses. Using a four‐ball tester, the effect of different concentrations of nanoadditives on the tribo‐performance of greases was investigated. Tribo‐test results revealed the role of nanoadditives in PAO‐based grease lubrication performance. COOH‐MWCNTs and OA‐LaF3 nanoadditives outperformed PAO grease in terms of physicochemical and tribo‐performance for steel‐steel tribo‐pair. The improved tribo‐performance is attributed to the formation of tribo‐film on the contact interfaces via nanoadditives. The development of tribo‐film was confirmed by XPS analysis of worn surfaces.
  • Augmentation in Tribological Performance of Polyalphaolefins by COOH-Functionalized Multiwalled Carbon Nanotubes as an Additive in Boundary Lubrication Conditions
    Homender Kumar, A. P. Harsha
    Journal of Tribology, 2021
    This current study emphasized the tribological performances of COOH-functionalized multiwalled carbon nanotubes (MWCNTs) dispersed in two different grades of polyalphaolefins (i.e., PAO 4 and PAO 6). The friction and wear properties have been estimated using SRV 5 tribometer with “ball-on-disc” configuration. Prior to tribo testing, MWCNTs were characterized by X-ray diffractometer (XRD), high-resolution transmission electron microscopy (HR-TEM), and Fourier-transform infrared spectroscopy (FTIR). The varying dose of MWCNTs (0.025–0.15 wt%) was incorporated into both PAO base oils to obtain the optimized lubrication behavior. The test results revealed that PAO 4 exhibited a reduction in friction coefficient (∼27%) and wear volume (∼88%) at a dose of 0.05 wt% and 0.025 wt% MWCNTs, respectively. However, in PAO 6, the minimum coefficient of friction and wear volume was obtained at a concentration of 0.075 wt% and 0.05 wt% of the additive. The results evidenced that PAO 6 based nanolubricants demonstrated the best frictional characteristics while attained the best anti-wear performance with PAO 4 based nanolubricants. For the better unveiling of the lubrication mechanism of MWCNTs, worn surfaces were characterized using various analytical techniques such as scanning electron microscopy (SEM), scanning probe microscope (SPM), energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron microscopy (XPS).
  • Taguchi optimization of various parameters for tribological performance of polyalphaolefins based nanolubricants
    Homender Kumar, AP Harsha
    Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology, 2021
    This research paper addresses the optimization of various control parameters by using the Taguchi method to assess the tribological properties of PAOs based nanolubricants. The concentration of COOH-functionalized multiwalled carbon nanotubes (MWCNTs), applied load, sliding velocity and kinematic viscosity of polyalphaolefins (PAOs) were selected as process parameters or control factor. The MWCNTs at a varying concentration (0.025-0.15 wt.%) were blended separately in PAOs to formulate the nanolubricants. The tribological experimentations were performed by Taguchi’ L18 mixed orthogonal array using “ball on disc” type tribometer. The analysis of variance (ANOVA) was adopted to estimate the most prominent factors influencing the tribological performance of nanolubricants. The statistical results showed that the applied load, followed by a concentration of MWCNTs conferred the most significant impact on the frictional characteristic. In contrast, the kinematic viscosity of PAOs, followed by concentration of MWCNTs has been observed the most significant influencing factors on the antiwear properties of nanolubricants. The probabilistic rationale for the advancement in friction and wear properties were assessed through various analytical tools.
  • Enhanced Lubrication Ability of Polyalphaolefin and Polypropylene Glycol by COOH-Functionalized Multiwalled Carbon Nanotubes as an Additive
    Homender Kumar, A. P. Harsha
    Journal of Materials Engineering and Performance, 2021
  • Influence of Oleic Acid–Treated LaF3 Nanoparticles as an Additive on Extreme Pressure Properties of Various Grades of Polyalphaolefins
    Homender Kumar, A. P. Harsha
    Tribology Transactions, 2021
    The present work focused on the extreme pressure characteristics of different grades of polyalphaolefins (i.e., PAO 4, PAO 6, PAO 40, and PAO 100) with LaF3 nanoparticles as an additive. The LaF3 nanoparticles were synthesized by the sol-gel method and modified with oleic acid. The synthesized nanoparticles were characterized with various analytical tools, viz. X-ray diffractometry (XRD), high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). Varying doses (0.025–0.15wt%) of synthesized nanoparticles were blended in all PAOs to prepare nanolubricants. The extreme pressure (EP) properties of nanolubricants were measured using a four-ball tester as per ASTM D2783 to find the last nonseizure load (LNSL), initial seizure load (ISL), just before weld load (JBWL), weld load (WL), and load wear index (LWI). The results revealed that the incorporation of LaF3 nanoparticles efficiently enhanced the EP properties of all PAOs. However, 0.15wt% of additive was the optimum dose in all PAOs, demonstrating the best EP behavior; that is, the highest LWI and lowest wear scar diameter (WSD) at ISL and JBWL. Numerous characterization techniques such as scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and scan probe microscopy (SPM) were adopted to investigate the probabilistic rationale for the improvement in EP properties. ARTICLE HISTORY Received 11 July 2021 Accepted 2 November 2021
  • Investigation on friction, antiwear, and extreme pressure properties of different grades of polyalphaolefins with functionalized multi-walled carbon nanotubes as an additive
    Homender Kumar, A. P. Harsha
    Journal of Tribology, 2020
    In the present investigation, the COOH-functionalized multi-walled carbon nanotubes (MWCNTs) having an outer diameter of 20–30 nm and length 1−2 μm were dispersed in four different grades of polyalphaolefins (PAOs; i.e., PAO 4, PAO 6, PAO 40, and PAO 100) at various concentrations (0.025, 0.05, 0.075, 0.10, and 0.15 wt%) to evaluate friction, anti-wear, and extreme pressure properties. The tribological test was conducted as per ASTM standard using four-ball tester. The test results showed that with the addition of MWCNTs, the friction and wear properties of PAOs had been improved significantly as compared to the base oils. It was also observed that MWCNTs exhibited excellent anti-wear properties than friction properties. The possible reasons for the improvement in friction and wear properties are discussed with the aid of various analytical tools.

RECENT SCHOLAR PUBLICATIONS

  • Nanotribology: An Introduction and Tribological Insights for Advanced Technological Systems
    SS Rawat, H Kumar, S Kumari
    Green Tribology and Industry 4.0, 200-219 , 2026
    2026.0
  • Synergistic effects of functionalized h-BN and ionic liquid on tribological performance and thermal stability of PAO-Based nanolubricants
    VK Gupta, B Singh, H Kumar, S Awasthi, MK Singh, JK Katiyar, A Mohan
    Tribology International, 111041 , 2025
    2025.0
    Citations: 2
  • Synthesis and Characterizations of Copper-Based Composite Using Powder Metallurgy Under Variable Compaction Loads
    MK Singh, S Dwivedi, S Verma, RK Gautam, H Kumar, G Ji, V Kumar, ...
    International Conference on Recent Advances in Functional Materials, 61-74 , 2024
    2024.0
  • Tribological evaluation of PAO 100 oil‐based lithium greases with chemically functionalized nanoadditives
    H Kumar, H AP, SS Rawat
    Lubrication Science 35 (7), 528-548 , 2023
    2023.0
    Citations: 10
  • Optimization of silica sand abrasive parameters on machining of glass plate in AJM using Taguchi method
    LKS Bhaskar Chandra Kandpal, Nitin Johri, Pramod Bhatia, Homender Kumar ...
    Materials Today: Proceedings, 1-6 , 2023
    2023.0
  • Influence of oleic acid–treated LaF3 nanoparticles as an additive on extreme pressure properties of various grades of polyalphaolefins
    H Kumar, AP Harsha
    Tribology Transactions 65 (1), 96-113 , 2022
    2022.0
    Citations: 15
  • Investigation on the tribological performance of polyalphaolefins (PAOs) based lubricant with nanoadditives
    H Kumar
    IIT (BHU) Varanasi , 2021
    2021.0
  • Augmentation in tribological performance of polyalphaolefins by COOH-functionalized multiwalled carbon nanotubes as an additive in boundary lubrication conditions
    H Kumar, AP Harsha
    Journal of Tribology 143 (10), 102202 , 2021
    2021.0
    Citations: 24
  • Group IV Base Stock:: Polyalphaolefin–A High-Performance Base Oil for Tribological Applications
    H Kumar, AP Harsha
    Tribology and Sustainability, 163-188 , 2021
    2021.0
    Citations: 5
  • Taguchi optimization of various parameters for tribological performance of polyalphaolefins based nanolubricants
    H Kumar, AP Harsha
    Proceedings of the Institution of Mechanical Engineers, Part J: Journal of … , 2021
    2021.0
    Citations: 24
  • Enhanced lubrication ability of polyalphaolefin and polypropylene glycol by COOH-functionalized multiwalled carbon nanotubes as an additive
    H Kumar, AP Harsha
    Journal of Materials Engineering and Performance 30 (2), 1075-1089 , 2021
    2021.0
    Citations: 23
  • Investigation on friction, anti-wear, and extreme pressure properties of different grades of polyalphaolefins with functionalized multi-walled carbon nanotubes as an additive
    H Kumar, AP Harsha
    Journal of Tribology 142 (8), 081702 , 2020
    2020.0
    Citations: 25
  • Tribological behaviour of synthetic lubricants with functionalized walled carbon nanotubes (MWCNT) as additive
    H Kumar, AP Harsha
    Proceedings of the international conference on tribology-tribology for … , 2018
    2018.0
  • Numerical Estimation of Stress Evolution and Crack Propagation in Twin-Disc Assembly
    AK Agrawal, H Kumar, A Shakil, JP Misra
    Available at SSRN 5018237 , 0

MOST CITED SCHOLAR PUBLICATIONS

  • Investigation on friction, anti-wear, and extreme pressure properties of different grades of polyalphaolefins with functionalized multi-walled carbon nanotubes as an additive
    H Kumar, AP Harsha
    Journal of Tribology 142 (8), 081702 , 2020
    2020.0
    Citations: 25
  • Augmentation in tribological performance of polyalphaolefins by COOH-functionalized multiwalled carbon nanotubes as an additive in boundary lubrication conditions
    H Kumar, AP Harsha
    Journal of Tribology 143 (10), 102202 , 2021
    2021.0
    Citations: 24
  • Taguchi optimization of various parameters for tribological performance of polyalphaolefins based nanolubricants
    H Kumar, AP Harsha
    Proceedings of the Institution of Mechanical Engineers, Part J: Journal of … , 2021
    2021.0
    Citations: 24
  • Enhanced lubrication ability of polyalphaolefin and polypropylene glycol by COOH-functionalized multiwalled carbon nanotubes as an additive
    H Kumar, AP Harsha
    Journal of Materials Engineering and Performance 30 (2), 1075-1089 , 2021
    2021.0
    Citations: 23
  • Influence of oleic acid–treated LaF3 nanoparticles as an additive on extreme pressure properties of various grades of polyalphaolefins
    H Kumar, AP Harsha
    Tribology Transactions 65 (1), 96-113 , 2022
    2022.0
    Citations: 15
  • Tribological evaluation of PAO 100 oil‐based lithium greases with chemically functionalized nanoadditives
    H Kumar, H AP, SS Rawat
    Lubrication Science 35 (7), 528-548 , 2023
    2023.0
    Citations: 10
  • Group IV Base Stock:: Polyalphaolefin–A High-Performance Base Oil for Tribological Applications
    H Kumar, AP Harsha
    Tribology and Sustainability, 163-188 , 2021
    2021.0
    Citations: 5
  • Synergistic effects of functionalized h-BN and ionic liquid on tribological performance and thermal stability of PAO-Based nanolubricants
    VK Gupta, B Singh, H Kumar, S Awasthi, MK Singh, JK Katiyar, A Mohan
    Tribology International, 111041 , 2025
    2025.0
    Citations: 2
  • Nanotribology: An Introduction and Tribological Insights for Advanced Technological Systems
    SS Rawat, H Kumar, S Kumari
    Green Tribology and Industry 4.0, 200-219 , 2026
    2026.0
  • Synthesis and Characterizations of Copper-Based Composite Using Powder Metallurgy Under Variable Compaction Loads
    MK Singh, S Dwivedi, S Verma, RK Gautam, H Kumar, G Ji, V Kumar, ...
    International Conference on Recent Advances in Functional Materials, 61-74 , 2024
    2024.0
  • Optimization of silica sand abrasive parameters on machining of glass plate in AJM using Taguchi method
    LKS Bhaskar Chandra Kandpal, Nitin Johri, Pramod Bhatia, Homender Kumar ...
    Materials Today: Proceedings, 1-6 , 2023
    2023.0
  • Investigation on the tribological performance of polyalphaolefins (PAOs) based lubricant with nanoadditives
    H Kumar
    IIT (BHU) Varanasi , 2021
    2021.0
  • Tribological behaviour of synthetic lubricants with functionalized walled carbon nanotubes (MWCNT) as additive
    H Kumar, AP Harsha
    Proceedings of the international conference on tribology-tribology for … , 2018
    2018.0
  • Numerical Estimation of Stress Evolution and Crack Propagation in Twin-Disc Assembly
    AK Agrawal, H Kumar, A Shakil, JP Misra
    Available at SSRN 5018237 , 0