Cnt-based signature control material

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 5/26 (2006.01) B29C 51/14 (2006.01) B32B 9/00 (2006.01)

Patent

CA 2758570

A radar absorbing composite includes a (CNT)-infused fiber material disposed in at least a portion of a matrix material. The composite absorbs radar in a frequency range from about 0.10 Megahertz to about 60 Gigahertz. The CNT-infused fiber material forms a first layer that reduces radar reflectance and a second layer that dissipates the energy of the radar. A method of manufacturing this composite includes disposing a CNT-infused fiber material in a portion of a matrix material with a controlled orientation of the CNT-infused fiber material within the matrix material, and curing the matrix material. The composite can be formed into a panel which is adaptable as a structural component of a transport vessel or missile for use in stealth applications.

L'invention concerne un composite absorbant radar comportant un matériau fibre NET disposé dans au moins une partie d'un matériau matrice. Le composite absorbe les ondes radar dans une plage de fréquences allant d'environ 0,10 Mégahertz à environ 60 Gigahertz. Le matériau en fibre NED forme une première couche réduisant le facteur de réflexion des ondes radar et une seconde couche dissipant l'énergie des ondes radar. Un procédé de fabrication de ce composite comporte l'étape consistant à déposer un matériau fibre NED dans une partie d'un matériau matrice avec une orientation commandée du matériau fibre NED à l'intérieur du matériau matrice, et à faire durcir le matériau matrice. Le composite peut être formé à l'intérieur d'un panneau pouvant être conçu comme composant structurel d'un récipient de transport ou missile destiné à être utilisé dans des applications furtives.

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