Preparation and Tribological Behaviors of Antigorite and Wollastonite Mineral Dual-Phase-Reinforced Polytetrafluoroethylene Matrix Composites
Research on polymer matrix composites with excellent tribological properties has received increasing attention in recent years. In this study, antigorite and wollastonite mineral dual-phase-reinforced polytetrafluoroethylene (PTFE) matrix composites were prepared by filling PTFE with mineral powders...
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| Format: | Article |
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MDPI AG
2024-02-01
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| Series: | Lubricants |
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| Online Access: | https://www.mdpi.com/2075-4442/12/3/74 |
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| author | Chen Wang Helong Yu Yanli Yin Xinyuan Zhou Hongmei Wang Zhanyong Song Shen Wang Zhe Yang Zhimin Bai |
| author_facet | Chen Wang Helong Yu Yanli Yin Xinyuan Zhou Hongmei Wang Zhanyong Song Shen Wang Zhe Yang Zhimin Bai |
| author_sort | Chen Wang |
| collection | DOAJ |
| description | Research on polymer matrix composites with excellent tribological properties has received increasing attention in recent years. In this study, antigorite and wollastonite mineral dual-phase-reinforced polytetrafluoroethylene (PTFE) matrix composites were prepared by filling PTFE with mineral powders using ball-milling, cold-pressing, and pressureless sintering methods. The phase structure, microstructure, chemical composition, Shore hardness, and tribological behavior of the composites rubbed against steel balls under dry friction conditions were investigated. The results show that the composites have a dense structure and uniform distribution of mineral phases, with a Shore hardness of 62–68.8, an increase of 18.7–23.7% compared to pure PTFE. Compared with the addition of mono antigorite or wollastonite, the composites prepared by simultaneously filling the two minerals exhibited excellent tribological properties. The average friction coefficient and wear volume of the (10Atg + 20Wl)/PTFE composites were reduced by 44.2% and 71.4%, respectively, compared to those of pure PTFE. A dense and continuous tribofilm composed mainly of SiO<sub>2</sub>, MgSiO<sub>3</sub>, Mg<sub>2</sub>SiO<sub>4</sub>, MgO, CaO, CaMg(SiO<sub>3</sub>)<sub>2</sub>, and CaF<sub>2</sub> was formed on the worn surfaces of both the dual-phase-reinforced PTFE matrix composites and counterpart steel balls during the friction process. The reduction in friction and wear is attributed to the reinforcement effect of the minerals on the PTFE matrix as well as the complex physical and chemical reactions at the friction interface stimulated by the synergistic effects between the two minerals. The addition of wollastonite reduced the phase transition temperature of antigorite, promoting more tribochemical reaction products with good abrasion resistance and friction-reducing properties, which contributed to the excellent tribological behavior of the composites. |
| first_indexed | 2024-04-24T18:05:03Z |
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| language | English |
| last_indexed | 2024-04-24T18:05:03Z |
| publishDate | 2024-02-01 |
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| series | Lubricants |
| spelling | doaj.art-9be5b6728c39420aab37ffdf62bb27da2024-03-27T13:51:41ZengMDPI AGLubricants2075-44422024-02-011237410.3390/lubricants12030074Preparation and Tribological Behaviors of Antigorite and Wollastonite Mineral Dual-Phase-Reinforced Polytetrafluoroethylene Matrix CompositesChen Wang0Helong Yu1Yanli Yin2Xinyuan Zhou3Hongmei Wang4Zhanyong Song5Shen Wang6Zhe Yang7Zhimin Bai8School of Materials Science and Engineering, China University of Geosciences, Beijing 100083, ChinaNational Key Lab for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, ChinaNational Key Lab for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, ChinaNational Key Lab for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, ChinaNational Key Lab for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, ChinaDepartment of Surport and Remanufacture Engineering, Army Academy of Armored Forces, Beijing 100072, ChinaSchool of Materials Science and Engineering, China University of Geosciences, Beijing 100083, ChinaNational Key Lab for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, ChinaSchool of Materials Science and Engineering, China University of Geosciences, Beijing 100083, ChinaResearch on polymer matrix composites with excellent tribological properties has received increasing attention in recent years. In this study, antigorite and wollastonite mineral dual-phase-reinforced polytetrafluoroethylene (PTFE) matrix composites were prepared by filling PTFE with mineral powders using ball-milling, cold-pressing, and pressureless sintering methods. The phase structure, microstructure, chemical composition, Shore hardness, and tribological behavior of the composites rubbed against steel balls under dry friction conditions were investigated. The results show that the composites have a dense structure and uniform distribution of mineral phases, with a Shore hardness of 62–68.8, an increase of 18.7–23.7% compared to pure PTFE. Compared with the addition of mono antigorite or wollastonite, the composites prepared by simultaneously filling the two minerals exhibited excellent tribological properties. The average friction coefficient and wear volume of the (10Atg + 20Wl)/PTFE composites were reduced by 44.2% and 71.4%, respectively, compared to those of pure PTFE. A dense and continuous tribofilm composed mainly of SiO<sub>2</sub>, MgSiO<sub>3</sub>, Mg<sub>2</sub>SiO<sub>4</sub>, MgO, CaO, CaMg(SiO<sub>3</sub>)<sub>2</sub>, and CaF<sub>2</sub> was formed on the worn surfaces of both the dual-phase-reinforced PTFE matrix composites and counterpart steel balls during the friction process. The reduction in friction and wear is attributed to the reinforcement effect of the minerals on the PTFE matrix as well as the complex physical and chemical reactions at the friction interface stimulated by the synergistic effects between the two minerals. The addition of wollastonite reduced the phase transition temperature of antigorite, promoting more tribochemical reaction products with good abrasion resistance and friction-reducing properties, which contributed to the excellent tribological behavior of the composites.https://www.mdpi.com/2075-4442/12/3/74antigoritewollastonitepolytetrafluoroethylenetribological behaviortribofilm |
| spellingShingle | Chen Wang Helong Yu Yanli Yin Xinyuan Zhou Hongmei Wang Zhanyong Song Shen Wang Zhe Yang Zhimin Bai Preparation and Tribological Behaviors of Antigorite and Wollastonite Mineral Dual-Phase-Reinforced Polytetrafluoroethylene Matrix Composites Lubricants antigorite wollastonite polytetrafluoroethylene tribological behavior tribofilm |
| title | Preparation and Tribological Behaviors of Antigorite and Wollastonite Mineral Dual-Phase-Reinforced Polytetrafluoroethylene Matrix Composites |
| title_full | Preparation and Tribological Behaviors of Antigorite and Wollastonite Mineral Dual-Phase-Reinforced Polytetrafluoroethylene Matrix Composites |
| title_fullStr | Preparation and Tribological Behaviors of Antigorite and Wollastonite Mineral Dual-Phase-Reinforced Polytetrafluoroethylene Matrix Composites |
| title_full_unstemmed | Preparation and Tribological Behaviors of Antigorite and Wollastonite Mineral Dual-Phase-Reinforced Polytetrafluoroethylene Matrix Composites |
| title_short | Preparation and Tribological Behaviors of Antigorite and Wollastonite Mineral Dual-Phase-Reinforced Polytetrafluoroethylene Matrix Composites |
| title_sort | preparation and tribological behaviors of antigorite and wollastonite mineral dual phase reinforced polytetrafluoroethylene matrix composites |
| topic | antigorite wollastonite polytetrafluoroethylene tribological behavior tribofilm |
| url | https://www.mdpi.com/2075-4442/12/3/74 |
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