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The Effect of MWCNT-Oil Impregnation of Sintered Components on Their Wear and Corrosion Resistance
Powder Metallurgy (PM) offers an advantageous route for manufacturing complex and near net-shape components. Their inherent interconnected porosity that promotes the action of self lubrication compromises their structural integrity by creating pathways for corrosion and excessive wear. This research...
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| Format: | Thesis |
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2026
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| _version_ | 1867613433497649152 |
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| access_status_str | Open Access |
| author | Abdelfadeel, Maha Khaled |
| author_browse | Abdelfadeel, Maha Khaled |
| author_facet | Abdelfadeel, Maha Khaled |
| author_sort | Abdelfadeel, Maha Khaled |
| collection | Thesis |
| description | Powder Metallurgy (PM) offers an advantageous route for manufacturing complex and near net-shape components. Their inherent interconnected porosity that promotes the action of self lubrication compromises their structural integrity by creating pathways for corrosion and excessive wear. This research investigates the efficacy of Multi-Walled Carbon Nanotubes (MWCNTs) as a nano additive within the impregnating base oil (SN-150 base oil). An experimental matrix was designed to evaluate the influence of MWCNTs with different concentrations of 0.05, 0.1, and 0.2 wt.% and ultrasonic dispersion with varying sonication times of 30 and 60 minutes on the tribological and electrochemical performance of sintered steel self-lubricating bushings. The study confirms that the use of MWCNTs -based nanofluids can successfully penetrate the porous sintered steel structures, achieving oil content exceeding 19% across all specimens. In tribological performances, lower concentrations of MWCNTs proved superior, where specimens impregnated with nanofluid (NF) containing 0.05 wt.% MWCNTs, sonicated for 60 minutes, exhibited approximately 90% reduction in wear rate, resulting in a value of 0.45mg/km compared to reference specimen achieving 4.7mg/km, and a stabilized coefficient of friction, induced by the rolling-effect mechanism of the dispersed MWCNTs. On the other hand, electrochemical polarization test method revealed that with increasing MWCNTs concentrations, corrosion resistance increases. NF, containing 0.2 wt.% MWCNTs, and sonicated for 60 minutes, exhibited an inhibition efficiency of approximately 82% and reduced the corrosion rate to 0.18 mm/year, compared to the reference specimen which demonstrated 1.02 mm/year. The resulting findings establish MWCNTs-NF as an impregnation lubricant a transformative approach for PM components, optimizing their mechanical properties and environmental resistance to meet industrial application requirements. |
| format | Thesis |
| id | oai:fount.aucegypt.edu:etds-3795 |
| institution | American University in Cairo (Egypt) |
| last_indexed | 2026-06-10T12:36:04.472Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from AUC Knowledge Fountain — bepress |
| publishDate | 2026 |
| publishDateRange | 2026 |
| publishDateSort | 2026 |
| publisher | AUC Knowledge Fountain |
| publisherStr | AUC Knowledge Fountain |
| record_format | dspace |
| source_str | AUC Knowledge Fountain — bepress |
| spelling | oai:fount.aucegypt.edu:etds-3795 The Effect of MWCNT-Oil Impregnation of Sintered Components on Their Wear and Corrosion Resistance Abdelfadeel, Maha Khaled Powder Metallurgy (PM) offers an advantageous route for manufacturing complex and near net-shape components. Their inherent interconnected porosity that promotes the action of self lubrication compromises their structural integrity by creating pathways for corrosion and excessive wear. This research investigates the efficacy of Multi-Walled Carbon Nanotubes (MWCNTs) as a nano additive within the impregnating base oil (SN-150 base oil). An experimental matrix was designed to evaluate the influence of MWCNTs with different concentrations of 0.05, 0.1, and 0.2 wt.% and ultrasonic dispersion with varying sonication times of 30 and 60 minutes on the tribological and electrochemical performance of sintered steel self-lubricating bushings. The study confirms that the use of MWCNTs -based nanofluids can successfully penetrate the porous sintered steel structures, achieving oil content exceeding 19% across all specimens. In tribological performances, lower concentrations of MWCNTs proved superior, where specimens impregnated with nanofluid (NF) containing 0.05 wt.% MWCNTs, sonicated for 60 minutes, exhibited approximately 90% reduction in wear rate, resulting in a value of 0.45mg/km compared to reference specimen achieving 4.7mg/km, and a stabilized coefficient of friction, induced by the rolling-effect mechanism of the dispersed MWCNTs. On the other hand, electrochemical polarization test method revealed that with increasing MWCNTs concentrations, corrosion resistance increases. NF, containing 0.2 wt.% MWCNTs, and sonicated for 60 minutes, exhibited an inhibition efficiency of approximately 82% and reduced the corrosion rate to 0.18 mm/year, compared to the reference specimen which demonstrated 1.02 mm/year. The resulting findings establish MWCNTs-NF as an impregnation lubricant a transformative approach for PM components, optimizing their mechanical properties and environmental resistance to meet industrial application requirements. 2026-06-15T07:00:00Z thesis application/pdf https://fount.aucegypt.edu/etds/2736 https://fount.aucegypt.edu/context/etds/article/3795/viewcontent/Maha_Khaled_Abdelfadeel_Thesis.pdf Theses and Dissertations AUC Knowledge Fountain MWCNTs Powder Metallurgy Oil impregnation Nanofluids Sintered Steel Engineering Manufacturing Materials Science and Engineering Mechanical Engineering Metallurgy Tribology |
| spellingShingle | MWCNTs Powder Metallurgy Oil impregnation Nanofluids Sintered Steel Engineering Manufacturing Materials Science and Engineering Mechanical Engineering Metallurgy Tribology Abdelfadeel, Maha Khaled The Effect of MWCNT-Oil Impregnation of Sintered Components on Their Wear and Corrosion Resistance |
| title | The Effect of MWCNT-Oil Impregnation of Sintered Components on Their Wear and Corrosion Resistance |
| title_full | The Effect of MWCNT-Oil Impregnation of Sintered Components on Their Wear and Corrosion Resistance |
| title_fullStr | The Effect of MWCNT-Oil Impregnation of Sintered Components on Their Wear and Corrosion Resistance |
| title_full_unstemmed | The Effect of MWCNT-Oil Impregnation of Sintered Components on Their Wear and Corrosion Resistance |
| title_short | The Effect of MWCNT-Oil Impregnation of Sintered Components on Their Wear and Corrosion Resistance |
| title_sort | effect of mwcnt oil impregnation of sintered components on their wear and corrosion resistance |
| topic | MWCNTs Powder Metallurgy Oil impregnation Nanofluids Sintered Steel Engineering Manufacturing Materials Science and Engineering Mechanical Engineering Metallurgy Tribology |
| url | https://fount.aucegypt.edu/etds/2736 https://fount.aucegypt.edu/context/etds/article/3795/viewcontent/Maha_Khaled_Abdelfadeel_Thesis.pdf |
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