Accession Number : ADA299714

Title :   Wideband Pulse Attenuation of an Uncured Metallized Glass Fiber Mat.

Descriptive Note : Final rept. 1 Dec 94-20 Jan 95,

Corporate Author : ARMY RESEARCH LAB ADELPHI MD

Personal Author(s) : Coburn, William O. ; Reiff, Christian G.

PDF Url : ADA299714

Report Date : SEP 1995

Pagination or Media Count : 22

Abstract : Metallized glass fiber (MG F) is a glass fiber substrate with a metal coating that can be used to improve the electrical properties of reinforced composites. The material considered here (RoMHOglasTM Metallized Glass Conductive Fibers, produced by Lundy Technical Center, Pompano Beach, FL) is an E-glass fiber metallized with aluminum and processed into a nonwoven mat. The U.S. Army Research Laboratory (ARL) is interested in evaluating such materials as an alternative to metals for electromagnetic shielding. In this preliminary study, the MGF mat was left uncured so that the basic properties of RoMHOglasTM could be investigated before the material was incorporated into a reinforced composite material. The ARL Scale Model Facility was used to characterize the shielding effectiveness (SE) of a planar sample of RoMHQglasTM by measurements of the wideband pulse attenuation of the material. The experimental technique and its application for SE measurements are discussed. The aftenuation of the pulse peak amplitude is 39 dB, and the corresponding frequency- dependent SE provides a reference for the electromagnetic properties of this commercially available composite material.

Descriptors :   *FIBER REINFORCED COMPOSITES, *METAL COATINGS, *GLASS FIBERS, *ELECTROMAGNETIC SHIELDING, *METALLIZING, FIBERGLASS, SCALE MODELS, CONDUCTIVITY, POLYMERS, COMPOSITE MATERIALS, ELECTROMAGNETIC PROPERTIES, ELECTRIC FIELDS, SUBSTRATES, ELECTRICAL PROPERTIES, ALUMINUM, POLYMERIC FILMS, ATTENUATION, CURING, REINFORCING MATERIALS, DIPOLE ANTENNAS, PULSE AMPLITUDE, METALLIC TEXTILES, MATS.

Subject Categories : Electromagnetic Shielding
      Refractory Fibers
      Coatings, Colorants and Finishes
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE