Thermal barrier systems and methods for access delay
| DWPI Title: Barrier system for use in container for securing item, comprises substrate, barrier layer applied to and coated upon substrate, additional barrier layer between and in contact with substrate and barrier layer, and outer layer covering barrier layer |
| Abstract: Protective barrier includes a soft metal that inhibits or delays thermal or grinding attack tool penetration. The soft metal, which may be disposed between other layers and otherwise delays thermal attack by expanding or “puffing” during attack. The soft metal can inhibit mechanical attack by rapid ablation and wear of a cutting wheel or blade. The protective barrier may additionally include an oxide or carbide layer. |
| Use: Barrier system for use in a container (claimed) for securing an item. |
| Advantage: The system inexpensively improves thermal and cutting tool attack resistance or access delay time while minimizing the weight of the barrier providing the delay. The system increases access delay to existing systems by applying a barrier coating without the use of mechanical fasteners, welding, machining, or damaging the underlying substrate. The ability to frustrate application of grinding wheel through rapid ablation and wear of the wheel resulting in a need for frequent blade changes. The barrier coating is applied by a thermal spraying or additive manufacturing process that allows the barrier layer coating to be applied to uneven surfaces. |
| Novelty: The barrier system (19) comprises a substrate (20A), and a barrier layer (20B) applied to and coated upon the substrate. An additional barrier layer is provided between and in contact with the substrate and the barrier layer, where the additional layer is formed of an additional barrier material selected from a group consisting of carbides and oxides. An outer layer (20C) covers the barrier layer, where the outer layer is selected from a group consisting of metals, ceramics, paints, polymers and epoxies. The barrier layer consists of a metal. The metal is selected from a group consisting of zinc, lead, tin, aluminum, gallium, thallium, indium, antimony, bismuth and copper. The additional barrier material is selected from a group consisting of aluminium oxide (Al2 O3 ), Titanium dioxide (TiO2 ), and yttria-stabilized zirconia. |
| Filed: 8/10/2016 |
| Application Number: US15233735A |
| Tech ID: SD 13437.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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