Tribological behavior and electrical insulation properties of micro-and nanoscale graphene/β-Si3N4 whisker-reinforced Si3N4 ceramics at low temperature
Si3N4 ceramics are ideal materials for liquid rocket turbopump bearings due to their excellent properties such as low-temperature resistance, low density, and wear resistance. To further enhance the sustained self-lubricating performance of bearings in low-temperature environments, novel Si3N4 ceram...
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| Language: | English |
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Elsevier
2025-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425007616 |
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| author | Fei Chen Xiaobo Sun Bin Fang Ke Yan Jun Hong Bei Yan |
| author_facet | Fei Chen Xiaobo Sun Bin Fang Ke Yan Jun Hong Bei Yan |
| author_sort | Fei Chen |
| collection | DOAJ |
| description | Si3N4 ceramics are ideal materials for liquid rocket turbopump bearings due to their excellent properties such as low-temperature resistance, low density, and wear resistance. To further enhance the sustained self-lubricating performance of bearings in low-temperature environments, novel Si3N4 ceramic composites containing micro- and nanoscale graphene and β-Si3N4 whisker were prepared via spark plasma sintering. The low-temperature tribological properties and electrical conductivity of Si3N4 ceramic composites were thoroughly analyzed. Results indicated that the dry sliding friction coefficient of Si3N4 ceramics at 10–20 N load and 77 K ranged from 0.11 to 0.28, representing a significant reduction of 6.67 %–64.52 % compared to that at 298 K. The enhanced tribological properties under cryogenic conditions was attributed to increased interatomic forces and improved frictional heat transfer. Additionally, the incorporation of 1 wt% graphene did not alter the insulating state of Si3N4 ceramics, as the limited graphene content hindered the formation of an effective electron transfer pathway within the matrix. This work provides new insights into the design of advanced ceramic composites for extreme environments. |
| format | Article |
| id | doaj-art-44c68c5f53cb4a5f92c67dbcdcac0c57 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-44c68c5f53cb4a5f92c67dbcdcac0c572025-08-20T03:42:26ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01361813182110.1016/j.jmrt.2025.03.252Tribological behavior and electrical insulation properties of micro-and nanoscale graphene/β-Si3N4 whisker-reinforced Si3N4 ceramics at low temperatureFei Chen0Xiaobo Sun1Bin Fang2Ke Yan3Jun Hong4Bei Yan5Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi׳an Jiaotong University, Xi'an, 710049, PR ChinaKey Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi׳an Jiaotong University, Xi'an, 710049, PR China; Luoyang Bearing Research Institute Co., Ltd, Luoyang, 471039, PR ChinaKey Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi׳an Jiaotong University, Xi'an, 710049, PR China; Corresponding author.Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi׳an Jiaotong University, Xi'an, 710049, PR China; Corresponding author.Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi׳an Jiaotong University, Xi'an, 710049, PR ChinaSchool of Construction Machinery, Chang'an University, Xi'an, 710064, PR ChinaSi3N4 ceramics are ideal materials for liquid rocket turbopump bearings due to their excellent properties such as low-temperature resistance, low density, and wear resistance. To further enhance the sustained self-lubricating performance of bearings in low-temperature environments, novel Si3N4 ceramic composites containing micro- and nanoscale graphene and β-Si3N4 whisker were prepared via spark plasma sintering. The low-temperature tribological properties and electrical conductivity of Si3N4 ceramic composites were thoroughly analyzed. Results indicated that the dry sliding friction coefficient of Si3N4 ceramics at 10–20 N load and 77 K ranged from 0.11 to 0.28, representing a significant reduction of 6.67 %–64.52 % compared to that at 298 K. The enhanced tribological properties under cryogenic conditions was attributed to increased interatomic forces and improved frictional heat transfer. Additionally, the incorporation of 1 wt% graphene did not alter the insulating state of Si3N4 ceramics, as the limited graphene content hindered the formation of an effective electron transfer pathway within the matrix. This work provides new insights into the design of advanced ceramic composites for extreme environments.http://www.sciencedirect.com/science/article/pii/S2238785425007616Tribological propertiesLow-temperatureSi3N4 ceramicsElectrical conductivity |
| spellingShingle | Fei Chen Xiaobo Sun Bin Fang Ke Yan Jun Hong Bei Yan Tribological behavior and electrical insulation properties of micro-and nanoscale graphene/β-Si3N4 whisker-reinforced Si3N4 ceramics at low temperature Journal of Materials Research and Technology Tribological properties Low-temperature Si3N4 ceramics Electrical conductivity |
| title | Tribological behavior and electrical insulation properties of micro-and nanoscale graphene/β-Si3N4 whisker-reinforced Si3N4 ceramics at low temperature |
| title_full | Tribological behavior and electrical insulation properties of micro-and nanoscale graphene/β-Si3N4 whisker-reinforced Si3N4 ceramics at low temperature |
| title_fullStr | Tribological behavior and electrical insulation properties of micro-and nanoscale graphene/β-Si3N4 whisker-reinforced Si3N4 ceramics at low temperature |
| title_full_unstemmed | Tribological behavior and electrical insulation properties of micro-and nanoscale graphene/β-Si3N4 whisker-reinforced Si3N4 ceramics at low temperature |
| title_short | Tribological behavior and electrical insulation properties of micro-and nanoscale graphene/β-Si3N4 whisker-reinforced Si3N4 ceramics at low temperature |
| title_sort | tribological behavior and electrical insulation properties of micro and nanoscale graphene β si3n4 whisker reinforced si3n4 ceramics at low temperature |
| topic | Tribological properties Low-temperature Si3N4 ceramics Electrical conductivity |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425007616 |
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