کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5460137 | 1516170 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature-dependent electromagnetic shielding properties of SiCf/BN/SiC composites fabricated by chemical vapor infiltration process
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Temperature-dependent electromagnetic shielding properties of SiCf/BN/SiC composites fabricated by chemical vapor infiltration process Temperature-dependent electromagnetic shielding properties of SiCf/BN/SiC composites fabricated by chemical vapor infiltration process](/preview/png/5460137.png)
چکیده انگلیسی
The SiCf/SiC composites with BN interphase were prepared by chemical vapor infiltration (CVI) process for electromagnetic interference (EMI) shielding applications at the temperatures from 25 °C to 700 °C in X band. The results reveal that the flexural strength of CVI-SiCf/BN/SiC composites can be up to 289 MPa, which shows an excellent mechanical property. Owing to the excess carbon and thermal excitation of SiC materials, both the complex permittivities and electrical conductivities of the composites increase with the increasing temperatures. Consequently, the composites show poor microwave absorption properties at various temperatures due to the impedance mismatch between the composites and free space. However, the absorption, reflection and total shielding effectiveness of the composites are improved from 9.0 dB, 4.5 dB and 13.5 dB-13.5 dB, 9.0 dB and 22.0 dB as the temperature increases to 700 °C. The mechanisms for the evolutions of complex permittivities and EMI shielding properties with the rising temperatures are also proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 724, 15 November 2017, Pages 633-640
Journal: Journal of Alloys and Compounds - Volume 724, 15 November 2017, Pages 633-640
نویسندگان
Yang Mu, Hao Li, Jiaxin Deng, Wancheng Zhou,