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AssigneeAdvanced Technology Materials, Inc.
InventorsWard C. Stevens, Edward A. Sturm
Estimating the term…
An article comprising a non-conductive substrate, preferably of an environmentally degradeable character, having a thickness of an oxidizable metal coating thereon, and optionally an oxidation enhancingly effective amount of a salt, e.g., from about 0.005 to about 25% by weight of salt, based on the weight of oxidizable metal, present on the oxidizable metal coating. Also disclosed is a related method of forming such article, comprising chemical vapor depositing the oxidizable metal coating on the substrate. When utilized in a form comprising fine-diameter substrate elements such as filaments, the resulting product may be usefully employed as an "evanescent" chaff. In the presence of atmospheric moisture, such evanescent chaff undergoes oxidization of the oxidizable metal coating so that the conductivity and radar absorbance/reflectance characteristics of the chaff transiently decays.
An article comprising a non-conductive substrate having coated thereon a thickness of an oxidizable metal coating with an exterior surface, and from about 0.005% to about 25% by weight, based on the weight of oxidizable metal in the oxidizable metal coating, of a salt which is effective to accelerate the rate of oxidation of oxidizable metal in the oxidizable metal coating under oxidation conditions therefor, the salt being present on the exterior surface of oxidizable metal coating.
An article comprising an environmentally degradable substrate having coated thereon a thickness of an oxidizable metal coating which is susceptible to oxidation under atmospheric exposure including at least 5% relative humidity.
An article comprising a non-conductive environmentally degradable substrate having coated thereon a thickness, of from about 0.001 to microns, 10 microns, of an oxidizable metal coating with an exterior surface, said metal being selected from the groups consisting of iron, aluminum, and aluminum-coated iron, and from about 0.005% to about 25% by weight, based on the weight of oxidizable metal in the oxidizable metal coating, of a salt which is effective to accelerate the rate of oxidation of oxidizable metal in the oxidizable metal coating under oxidation conditions therefor, the salt being present on the exterior surface of oxidizable metal coating.
Dependencies are inferred from the claim text.