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Research on the Absorption Properties of Fe 70 Ni 30 Alloy/SiO 2 Coated Continuous Glass Fiber Composites by Magnetron Sputtering.

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Title: Research on the Absorption Properties of Fe 70 Ni 30 Alloy/SiO 2 Coated Continuous Glass Fiber Composites by Magnetron Sputtering.
Authors: Zhou, Zhuohui1,2 (AUTHOR), Zhou, Mengyu2 (AUTHOR), Wang, Zhiyong1,2 (AUTHOR), Zhao, Yan1,2 (AUTHOR) jennyzhaoyan@buaa.edu.cn
Source: Materials (1996-1944). Jun2026, Vol. 19 Issue 12, p2552. 18p.
Subjects: Magnetron sputtering, Iron-nickel alloys, Genetic algorithms, Electromagnetic wave absorption, Silica films, Electromagnetism, Scanning electron microscopy, Glass-reinforced plastics
Abstract: In this study, Fe70Ni30 metal was deposited onto continuous glass fiber composites via magnetron sputtering, followed by surface coating with SiO2. The effects of key process parameters-including Fe70Ni30 sputtering duration (2, 5, 10, 20, and 30 min) and SiO2 surface coating-on the electromagnetic properties and microwave absorption performance of the materials were systematically investigated. Scanning electron microscopy (SEM) characterization revealed that as sputtering time increased, the metal coating evolved from discrete small particles into a continuous film. Cross-sectional SEM analysis further demonstrated the formation of a bilayer structure after SiO2 introduction. X-ray diffraction (XRD) patterns confirmed the presence of diffraction peaks corresponding to the Fe70Ni30 alloy solid solution. Electromagnetic parameter measurements indicated that the influence of sputtering time on electromagnetic properties was primarily pronounced during the metal layer growth stage; once a continuous film was formed, the variation in electromagnetic parameters diminished. Concurrently, the SiO2 coating exhibited a significant regulatory effect on dielectric parameters. Reflection coefficient calculations showed that the optimal absorption thickness for the single-layer material ranged from 2.5 to 3.0 mm, with the absorption peak shifting toward lower frequencies as thickness increased. However, the effective absorption bandwidth (EAB) was only 3–5 GHz, failing to meet wideband requirements. In contrast, the three-layer composite structure (total thickness: 3.8 mm) optimized via genetic algorithm achieved impedance gradient and loss synergy, expanding the EBW (R < −10 dB) from 4.8 GHz (single layer) to 10 GHz (8–18.0 GHz)-a substantial improvement over the single-layer configuration. This work provides experimental evidence and technical support for the structural design and process optimization of lightweight, high-efficiency, wideband microwave-absorbing materials. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Research on the Absorption Properties of Fe 70 Ni 30 Alloy/SiO 2 Coated Continuous Glass Fiber Composites by Magnetron Sputtering.
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  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Zhou%2C+Zhuohui%22&quot;&gt;Zhou, Zhuohui&lt;/searchLink&gt;&lt;relatesTo&gt;1,2&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Zhou%2C+Mengyu%22&quot;&gt;Zhou, Mengyu&lt;/searchLink&gt;&lt;relatesTo&gt;2&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Wang%2C+Zhiyong%22&quot;&gt;Wang, Zhiyong&lt;/searchLink&gt;&lt;relatesTo&gt;1,2&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Zhao%2C+Yan%22&quot;&gt;Zhao, Yan&lt;/searchLink&gt;&lt;relatesTo&gt;1,2&lt;/relatesTo&gt; (AUTHOR)&lt;i&gt; jennyzhaoyan@buaa.edu.cn&lt;/i&gt;
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Materials+%281996-1944%29%22&quot;&gt;Materials (1996-1944)&lt;/searchLink&gt;. Jun2026, Vol. 19 Issue 12, p2552. 18p.
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  Data: In this study, Fe70Ni30 metal was deposited onto continuous glass fiber composites via magnetron sputtering, followed by surface coating with SiO2. The effects of key process parameters-including Fe70Ni30 sputtering duration (2, 5, 10, 20, and 30 min) and SiO2 surface coating-on the electromagnetic properties and microwave absorption performance of the materials were systematically investigated. Scanning electron microscopy (SEM) characterization revealed that as sputtering time increased, the metal coating evolved from discrete small particles into a continuous film. Cross-sectional SEM analysis further demonstrated the formation of a bilayer structure after SiO2 introduction. X-ray diffraction (XRD) patterns confirmed the presence of diffraction peaks corresponding to the Fe70Ni30 alloy solid solution. Electromagnetic parameter measurements indicated that the influence of sputtering time on electromagnetic properties was primarily pronounced during the metal layer growth stage; once a continuous film was formed, the variation in electromagnetic parameters diminished. Concurrently, the SiO2 coating exhibited a significant regulatory effect on dielectric parameters. Reflection coefficient calculations showed that the optimal absorption thickness for the single-layer material ranged from 2.5 to 3.0 mm, with the absorption peak shifting toward lower frequencies as thickness increased. However, the effective absorption bandwidth (EAB) was only 3–5 GHz, failing to meet wideband requirements. In contrast, the three-layer composite structure (total thickness: 3.8 mm) optimized via genetic algorithm achieved impedance gradient and loss synergy, expanding the EBW (R &lt; −10 dB) from 4.8 GHz (single layer) to 10 GHz (8–18.0 GHz)-a substantial improvement over the single-layer configuration. This work provides experimental evidence and technical support for the structural design and process optimization of lightweight, high-efficiency, wideband microwave-absorbing materials. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/ma19122552
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 18
        StartPage: 2552
    Subjects:
      – SubjectFull: Magnetron sputtering
        Type: general
      – SubjectFull: Iron-nickel alloys
        Type: general
      – SubjectFull: Genetic algorithms
        Type: general
      – SubjectFull: Electromagnetic wave absorption
        Type: general
      – SubjectFull: Silica films
        Type: general
      – SubjectFull: Electromagnetism
        Type: general
      – SubjectFull: Scanning electron microscopy
        Type: general
      – SubjectFull: Glass-reinforced plastics
        Type: general
    Titles:
      – TitleFull: Research on the Absorption Properties of Fe 70 Ni 30 Alloy/SiO 2 Coated Continuous Glass Fiber Composites by Magnetron Sputtering.
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          Name:
            NameFull: Zhou, Zhuohui
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            NameFull: Zhou, Mengyu
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            NameFull: Wang, Zhiyong
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            NameFull: Zhao, Yan
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            – D: 15
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
          Identifiers:
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            – TitleFull: Materials (1996-1944)
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