Surface Modification of Silica Nanoparticles with Ethyl Oleate for the Purpose of Stabilizing Nanolubricants Used for Tribological Tests
Abstract
:1. Introduction
2. Materials and Methods
2.1. Nanoparticle Surface Modification
2.2. Nanolubricant Preparation
2.3. Methods of Oil Sample Inspection
2.4. Methods of Nanoparticle Inspection
2.5. Methods of Tribological Inspection
3. Results
3.1. Silica Particle Size Measurement
3.2. ATR-FTIR Spectroscopic Examinations
3.3. Tribological Experiments
4. Discussion and Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Specimen | Dimensions | Material | Heat Treatment | Hardness | Machining | Surface Roughness |
---|---|---|---|---|---|---|
Ball | Ø10 mm | 100Cr6 | - | 61 ± 1 HRC | polishing | Ra 0.025 ± 0.005 µm |
Disc | Ø24 mm × 7.9 mm | 100Cr6, vacuum arc melted | spherodized and annealed | 62 ± 1 HRC | lapping | 0.035 < Ra < 0.05 µm 0.5 < Rz < 0.65 µm |
Parameter | Stroke | Frequency | Specimen T | Oil T | Oil Flow Rate | Load | Time |
---|---|---|---|---|---|---|---|
Step 1 | 1 mm | 50 Hz | 100 °C | 100 °C | 225 mL/h | 50 N | 30 s |
Step 2 | 1 mm | 50 Hz | 100 °C | 100 °C | 225 mL/h | 100 N | 2 h |
Sample | Average PMV (nm) | SD (n > 3) |
---|---|---|
SM SiO2 | 5.0 | 0.87 |
SiO2 | 5.5 | 0.6 |
Group III base oil | 8.8 | 1.6 |
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Tóth, Á.D.; Mike-Kaszás, N.; Bartus, G.; Hargitai, H.; Szabó, Á.I. Surface Modification of Silica Nanoparticles with Ethyl Oleate for the Purpose of Stabilizing Nanolubricants Used for Tribological Tests. Ceramics 2023, 6, 980-993. https://doi.org/10.3390/ceramics6020058
Tóth ÁD, Mike-Kaszás N, Bartus G, Hargitai H, Szabó ÁI. Surface Modification of Silica Nanoparticles with Ethyl Oleate for the Purpose of Stabilizing Nanolubricants Used for Tribological Tests. Ceramics. 2023; 6(2):980-993. https://doi.org/10.3390/ceramics6020058
Chicago/Turabian StyleTóth, Álmos Dávid, Nóra Mike-Kaszás, Gábor Bartus, Hajnalka Hargitai, and Ádám István Szabó. 2023. "Surface Modification of Silica Nanoparticles with Ethyl Oleate for the Purpose of Stabilizing Nanolubricants Used for Tribological Tests" Ceramics 6, no. 2: 980-993. https://doi.org/10.3390/ceramics6020058