Investigation of composite materials selection and joint layout design to enhance EMI shielding of electronic equipment

1997 ◽  
Vol 37 (3) ◽  
pp. 653-666 ◽  
Author(s):  
Behzad D. Mottahed ◽  
Souran Manoochehri
Keyword(s):  
Composite Materials ◽  
Layout Design ◽  
Electronic Equipment ◽  
Emi Shielding ◽  
Materials Selection

Wood fiber ferrite micro- and nano-composite materials for EMI-shielding

2013 ◽  
pp. 117-125
Author(s):  
K Dimitrov ◽  
T Döhler ◽  
M Herzog ◽  
S Schrader ◽  
S Nenkova
Keyword(s):  
Composite Materials ◽  
Wood Fiber ◽  
Emi Shielding ◽  
Nano Composite

Integration of Carbon Nanotubes Into a Fiberglass Reinforced Polymer Composite and its Effects on Electromagnetic Shielding and Mechanical Properties

2013 ◽  
Author(s):  
Mehran Tehrani ◽  
Ayoub Y. Boroujeni ◽  
Majid Manteghi ◽  
Zhixian Zhou ◽  
Marwan Al-Haik
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Composite Materials ◽  
Electromagnetic Interference ◽  
Hybrid Composites ◽  
Fiber Surface ◽  
Shielding Effectiveness ◽  
Emi Shielding ◽  
Electrically Conductive ◽  
Coated Fabric

Electromagnetic (EM) waves, such as electronic noise and radio frequency interference can be regarded as an invisible electronic pollution which justifies a very active quest for effective electromagnetic interference (EMI) shielding materials. Highly conductive materials of adequate thickness are the primary solutions to shield against EMI. Equipment cases and basic structure of space aircraft and launch vehicles have traditionally been made of aluminum, steel and other electrically conductive metals. However, in recent years composite materials have been used for electronic equipment manufacturing because of their lightweight, high strength, and ease of fabrication. Despite these benefits, composite materials are not as electrically conductive as traditional metals, especially in terms of electrical grounding purposes and shielding. Therefore, extra effort must be taken to resolve these shortcomings. The present work demonstrates a study on developing hybrid composites based on fiberglass with surface grown carbon nanotubes (CNTs) for EMI applications. The choice of fiberglass is primarily because it naturally possesses poor electrical conductivity, hence growing CNTs over glass fiber surface can significantly improve the conductivity. The fabrics were sputter-coated with a thin layer of SiO2 thermal barrier prior to growing of CNTs. The CNTs were grown on the surface of woven fiberglass fabrics utilizing a relatively low temperature technique. Raw fiberglass fabric, SiO2 coated fabric, and SiO2 coated fabric which was subjected to the identical heat treatment as the samples with CNTs were also prepared. Two-layers composite specimens based on different surface treated fiberglass fabrics were fabricated and their EMI shielding effectiveness (SE) was measured. The EMI SE of the hybrid CNT-fiberglass composites was shown to be 5–10 times of the reference samples. However, the tensile mechanical properties of the composites based on the different above mentioned fibers revealed significant degradation due to the elevated CNT growth temperature and the addition of coating layer and CNTs. To further probe the structure of the hybrid composites and the inter-connectivity of the CNTs from one interface to another, sets of 20-layers composites based on different surface treated fabrics were also fabricated and characterized.

scholarly journals Multi-criteria decision making under uncertainties in composite materials selection and design

2022 ◽  
Vol 279 ◽  
pp. 114680
Author(s):  
Dinesh Kumar ◽  
Mariapia Marchi ◽  
Syed Bahauddin Alam ◽  
Carlos Kavka ◽  
Yao Koutsawa ◽  
...  
Keyword(s):  
Decision Making ◽  
Composite Materials ◽  
Multi Criteria Decision Making ◽  
Materials Selection

On the Design and Materials Selection of Composite Material Ocean Flexible Pipe

2015 ◽  
Vol 1090 ◽  
pp. 22-25
Author(s):  
Lin Zhao ◽  
Ming Lei Liu
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Oil And Gas ◽  
Structure Design ◽  
Materials Selection ◽  
Flexible Pipe ◽  
Flexible Pipes ◽  
Selection Of

This paper aims to discuss the composite materials application in ocean oil and gas flexible pipes, from the functional principles to the technical methodology in materials selection and pipe structure design.

Fabrication of lightweight and flexible silicon rubber foams with ultra-efficient electromagnetic interference shielding and adjustable low reflectivity

2020 ◽  
Vol 8 (1) ◽  
pp. 147-157 ◽  
Author(s):  
Jianming Yang ◽  
Xia Liao ◽  
Gui Wang ◽  
Jia Chen ◽  
Wanyu Tang ◽  
...  
Keyword(s):  
Communication Technology ◽  
High Power ◽  
Electromagnetic Interference ◽  
Electronic Equipment ◽  
Power Electronic ◽  
Next Generation ◽  
Emi Shielding ◽  
Electromagnetic Interference Shielding ◽  
Silicon Rubber ◽  
Shielding Composites

Lightweight and efficient electromagnetic interference (EMI) shielding composites are of great significance for the development of next generation communication technology, wearable equipment and high-power electronic equipment.

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