Sepiolite: A new component suitable for 380 km/h high-speed rail brake pads
To enhance the high-temperature adaptability of copper-based composite materials and C–C/SiC discs, this article innovatively introduces a method of replacing graphite with sepiolite, resulting in the successful fabrication of samples with exceptional mechanical and friction properties. The results...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co. Ltd.
2024-08-01
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| Series: | Advanced Powder Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772834X24000307 |
| _version_ | 1797221712507437056 |
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| author | Jiaqi Wu Zhuan Li Guoyuan Wen Zonglong Gao Ye Li Yang Li Peng Xiao |
| author_facet | Jiaqi Wu Zhuan Li Guoyuan Wen Zonglong Gao Ye Li Yang Li Peng Xiao |
| author_sort | Jiaqi Wu |
| collection | DOAJ |
| description | To enhance the high-temperature adaptability of copper-based composite materials and C–C/SiC discs, this article innovatively introduces a method of replacing graphite with sepiolite, resulting in the successful fabrication of samples with exceptional mechanical and friction properties. The results reveal that moderate incorporation (less 6%) of sepiolite provides a particle reinforcement effect, resulting in an improvement of mechanical properties. Interestingly, the addition of sepiolite causes a change in the traditional saddle-shaped friction curve due to high temperature lubrication. Meanwhile, the primary advantage of sepiolite lies in its superior abrasion resistance, evident in the increased friction coefficient and altered wear mechanisms with higher sepiolite content. The wear resistance is optimal at 200 Km/h (400 °C). Particularly, the unique composition of the friction layer (outermost layer: a composite film consisting of B2O3, sepiolite, graphite, and metal oxide films; intermediate layer: metal oxide films) plays a pivotal role in improving friction stability. Finally, there are significant optimizations in the GA algorithm, especially GA-GB model has the best prediction effect on the maximum friction temperature. |
| first_indexed | 2024-04-24T13:09:48Z |
| format | Article |
| id | doaj.art-971c176a6d004c218c61a57df1bf4b39 |
| institution | Directory Open Access Journal |
| issn | 2772-834X |
| language | English |
| last_indexed | 2024-04-24T13:09:48Z |
| publishDate | 2024-08-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Advanced Powder Materials |
| spelling | doaj.art-971c176a6d004c218c61a57df1bf4b392024-04-05T04:41:58ZengKeAi Communications Co. Ltd.Advanced Powder Materials2772-834X2024-08-0134100199Sepiolite: A new component suitable for 380 km/h high-speed rail brake padsJiaqi Wu0Zhuan Li1Guoyuan Wen2Zonglong Gao3Ye Li4Yang Li5Peng Xiao6Powder Metallurgy Research Institute, Central South University, Changsha 410083, ChinaCorresponding author.; Powder Metallurgy Research Institute, Central South University, Changsha 410083, ChinaPowder Metallurgy Research Institute, Central South University, Changsha 410083, ChinaPowder Metallurgy Research Institute, Central South University, Changsha 410083, ChinaPowder Metallurgy Research Institute, Central South University, Changsha 410083, ChinaPowder Metallurgy Research Institute, Central South University, Changsha 410083, ChinaPowder Metallurgy Research Institute, Central South University, Changsha 410083, ChinaTo enhance the high-temperature adaptability of copper-based composite materials and C–C/SiC discs, this article innovatively introduces a method of replacing graphite with sepiolite, resulting in the successful fabrication of samples with exceptional mechanical and friction properties. The results reveal that moderate incorporation (less 6%) of sepiolite provides a particle reinforcement effect, resulting in an improvement of mechanical properties. Interestingly, the addition of sepiolite causes a change in the traditional saddle-shaped friction curve due to high temperature lubrication. Meanwhile, the primary advantage of sepiolite lies in its superior abrasion resistance, evident in the increased friction coefficient and altered wear mechanisms with higher sepiolite content. The wear resistance is optimal at 200 Km/h (400 °C). Particularly, the unique composition of the friction layer (outermost layer: a composite film consisting of B2O3, sepiolite, graphite, and metal oxide films; intermediate layer: metal oxide films) plays a pivotal role in improving friction stability. Finally, there are significant optimizations in the GA algorithm, especially GA-GB model has the best prediction effect on the maximum friction temperature.http://www.sciencedirect.com/science/article/pii/S2772834X24000307Lubrication-wearSepiolite-graphiteHigh-speed rail brake padsMechanismsFriction layerPrediction of temperature |
| spellingShingle | Jiaqi Wu Zhuan Li Guoyuan Wen Zonglong Gao Ye Li Yang Li Peng Xiao Sepiolite: A new component suitable for 380 km/h high-speed rail brake pads Advanced Powder Materials Lubrication-wear Sepiolite-graphite High-speed rail brake pads Mechanisms Friction layer Prediction of temperature |
| title | Sepiolite: A new component suitable for 380 km/h high-speed rail brake pads |
| title_full | Sepiolite: A new component suitable for 380 km/h high-speed rail brake pads |
| title_fullStr | Sepiolite: A new component suitable for 380 km/h high-speed rail brake pads |
| title_full_unstemmed | Sepiolite: A new component suitable for 380 km/h high-speed rail brake pads |
| title_short | Sepiolite: A new component suitable for 380 km/h high-speed rail brake pads |
| title_sort | sepiolite a new component suitable for 380 km h high speed rail brake pads |
| topic | Lubrication-wear Sepiolite-graphite High-speed rail brake pads Mechanisms Friction layer Prediction of temperature |
| url | http://www.sciencedirect.com/science/article/pii/S2772834X24000307 |
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