| WANG Chang,JI Chang-song,YUE Jian-ling,HUANG Xiao-zhong,DU Zuo-juan,TANG Xiu-zhi.Soft Magnetic Properties and Electromagnetic Shielding Effectiveness of Magnetic FeNi Coated Carbon Fibers[J],47(6):174-180 |
| Soft Magnetic Properties and Electromagnetic Shielding Effectiveness of Magnetic FeNi Coated Carbon Fibers |
| Received:December 11, 2017 Revised:June 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.06.025 |
| KeyWord:FeNi coated carbon fibers Ni coated carbon fibers electromagnetic shielding effectiveness soft-magnetic properties electroless plating method |
| Author | Institution |
| WANG Chang |
1.Central South University, Changsha , China; 2.Hunan Key laboratory of Advanced Fibers and Composites, Changsha , China |
| JI Chang-song |
China Academy of Launch Vehicle Technology, Beijing , China |
| YUE Jian-ling |
1.Central South University, Changsha , China; 2.Hunan Key laboratory of Advanced Fibers and Composites, Changsha , China |
| HUANG Xiao-zhong |
1.Central South University, Changsha , China; 2.Hunan Key laboratory of Advanced Fibers and Composites, Changsha , China |
| DU Zuo-juan |
1.Central South University, Changsha , China; 2.Hunan Key laboratory of Advanced Fibers and Composites, Changsha , China |
| TANG Xiu-zhi |
1.Central South University, Changsha , China; 2.Hunan Key laboratory of Advanced Fibers and Composites, Changsha , China |
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| Abstract: |
| The work aims to prepare a new shielding material exhibiting excellent electromagnetic shielding effectiveness and soft magnetic properties. Electroless plating was adopted to prepare FeNi alloy coating and Ni coating on the surface of carbon fiber. Microstructure, composition and plating structure of the carbon fibers were analyzed using SEM, EDS and XRD. The soft magnetic properties were also investigated with VSM. Resistance was measured with a multimeter, and conductivity was calculated. Moreover, electromagnetic parameters were also measured with a network vector analyzer, and electromagnetic shielding effectiveness was calculated. Above-mentioned properties of FeNi coated carbon fiber and Ni coated carbon fiber were compared. Metal coating was uniform and grains were fine. Coercivity of FeNi coated carbon fiber was 29.25 Oe, and saturation magnetization was 25.61 emu/g. Value of electromagnetic shielding effectiveness of FeNi coated carbon fiber was over 30 dB in the frequency range of 7.92~18 GHz, and the maximum value was 40.79 dB. The metal coating endowed carbon fibers with soft magnetic properties, adjusted electromagnetic parameters effectively, and further improved the electromagnetic shielding effec-tiveness significantly. Compared with Ni-coated carbon fibers, the above-mentioned properties of FeNi coated carbon were better. The study has provided a new scheme for preparing a novel shielding material exhibiting excellent electromagnetic shielding effectiveness and soft magnetic properties. |
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