Strengthening and Toughening CNTs/Mg Composites by OpTimizing the Grinding Time of Magnesium Powder
In this paper, CNT/Mg composites with high compressive properties were prepared by using Ni-plated CNT and pure magnesium powder as raw materials through the grinding of magnesium powder, ball-milling mixing and hot-pressing sintering. The effect of grinding time for finer magnesium powder on the mi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/23/4277 |
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| author | Yunpeng Ding Yizhuang Zhang Zhiyuan Li Changhong Liu Hanying Wang Xin Zhao Xinfang Zhang Jilei Xu Xiaoqin Guo |
| author_facet | Yunpeng Ding Yizhuang Zhang Zhiyuan Li Changhong Liu Hanying Wang Xin Zhao Xinfang Zhang Jilei Xu Xiaoqin Guo |
| author_sort | Yunpeng Ding |
| collection | DOAJ |
| description | In this paper, CNT/Mg composites with high compressive properties were prepared by using Ni-plated CNT and pure magnesium powder as raw materials through the grinding of magnesium powder, ball-milling mixing and hot-pressing sintering. The effect of grinding time for finer magnesium powder on the microstructure and properties of the final composites was studied mainly by SEM, XRD, HRTEM and compression tests. The results show that with the prolongation of milling time, the magnesium particle size decreases gradually and the CNT dispersion becomes more uniform. Moreover, the nickel layer on the surface of CNT reacts with highly active broken magnesium powder in the sintering process to generate MgNi<sub>2</sub> intermediate alloy, which significantly improves interface bonding. The strength and fracture strain of composites are significantly increased by the combined action of the uniform distribution of CNTs and strong interface bonding from the MgNi<sub>2</sub> phase. The compressive strength, yield strength and fracture strain of the composites, prepared with a 60 h grinding of magnesium powder, reached 268%, 272% and 279% of those in composites without the grinding of magnesium powder. |
| first_indexed | 2024-03-09T17:38:16Z |
| format | Article |
| id | doaj.art-fc24986c68b34eb0a0194c6b85757707 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T17:38:16Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-fc24986c68b34eb0a0194c6b857577072023-11-24T11:48:21ZengMDPI AGNanomaterials2079-49912022-12-011223427710.3390/nano12234277Strengthening and Toughening CNTs/Mg Composites by OpTimizing the Grinding Time of Magnesium PowderYunpeng Ding0Yizhuang Zhang1Zhiyuan Li2Changhong Liu3Hanying Wang4Xin Zhao5Xinfang Zhang6Jilei Xu7Xiaoqin Guo8School of Materials, Zhengzhou University of Aeronautics, Zhengzhou 450046, ChinaSchool of Materials, Zhengzhou University of Aeronautics, Zhengzhou 450046, ChinaSchool of Materials, Zhengzhou University of Aeronautics, Zhengzhou 450046, ChinaSchool of Materials, Zhengzhou University of Aeronautics, Zhengzhou 450046, ChinaSchool of Materials, Zhengzhou University of Aeronautics, Zhengzhou 450046, ChinaSchool of Materials, Zhengzhou University of Aeronautics, Zhengzhou 450046, ChinaSchool of Materials, Zhengzhou University of Aeronautics, Zhengzhou 450046, ChinaSchool of Materials, Zhengzhou University of Aeronautics, Zhengzhou 450046, ChinaSchool of Materials, Zhengzhou University of Aeronautics, Zhengzhou 450046, ChinaIn this paper, CNT/Mg composites with high compressive properties were prepared by using Ni-plated CNT and pure magnesium powder as raw materials through the grinding of magnesium powder, ball-milling mixing and hot-pressing sintering. The effect of grinding time for finer magnesium powder on the microstructure and properties of the final composites was studied mainly by SEM, XRD, HRTEM and compression tests. The results show that with the prolongation of milling time, the magnesium particle size decreases gradually and the CNT dispersion becomes more uniform. Moreover, the nickel layer on the surface of CNT reacts with highly active broken magnesium powder in the sintering process to generate MgNi<sub>2</sub> intermediate alloy, which significantly improves interface bonding. The strength and fracture strain of composites are significantly increased by the combined action of the uniform distribution of CNTs and strong interface bonding from the MgNi<sub>2</sub> phase. The compressive strength, yield strength and fracture strain of the composites, prepared with a 60 h grinding of magnesium powder, reached 268%, 272% and 279% of those in composites without the grinding of magnesium powder.https://www.mdpi.com/2079-4991/12/23/4277carbon nanotubemagnesium matrix nanocompositestrengtheningtougheningmechanical property |
| spellingShingle | Yunpeng Ding Yizhuang Zhang Zhiyuan Li Changhong Liu Hanying Wang Xin Zhao Xinfang Zhang Jilei Xu Xiaoqin Guo Strengthening and Toughening CNTs/Mg Composites by OpTimizing the Grinding Time of Magnesium Powder Nanomaterials carbon nanotube magnesium matrix nanocomposite strengthening toughening mechanical property |
| title | Strengthening and Toughening CNTs/Mg Composites by OpTimizing the Grinding Time of Magnesium Powder |
| title_full | Strengthening and Toughening CNTs/Mg Composites by OpTimizing the Grinding Time of Magnesium Powder |
| title_fullStr | Strengthening and Toughening CNTs/Mg Composites by OpTimizing the Grinding Time of Magnesium Powder |
| title_full_unstemmed | Strengthening and Toughening CNTs/Mg Composites by OpTimizing the Grinding Time of Magnesium Powder |
| title_short | Strengthening and Toughening CNTs/Mg Composites by OpTimizing the Grinding Time of Magnesium Powder |
| title_sort | strengthening and toughening cnts mg composites by optimizing the grinding time of magnesium powder |
| topic | carbon nanotube magnesium matrix nanocomposite strengthening toughening mechanical property |
| url | https://www.mdpi.com/2079-4991/12/23/4277 |
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