Abstract
An electromagnetic pulse (EMP) explodes in real-time and causes critical damage within a short period to not only electric devices, but also to national infrastructures. In terms of EMP shielding rooms, metal plate has been used due to its excellent shielding effectiveness (SE). However, it has difficulties in manufacturing, as the fabrication of welded parts of metal plates and the cost of construction are non-economical. The objective of this study is to examine the applicability of the arc thermal metal spraying (ATMS) method as a new EMP shielding method to replace metal plate. The experimental parameters, metal types (Cu, Zn-Al), and coating thickness (100–700 μm) used for the ATMS method were considered. As an experiment, a SE test against an EMP in the range of 103 to 1010 Hz was conducted. Results showed that the ATMS coating with Zn-Al had similar shielding performance in comparison with metal plate. In conclusion, the ATMS method is judged to have a high possibility of actual application as a new EMP shielding material.
Highlights
An electromagnetic pulse (EMP), generated by a nuclear explosion, can neutralize electronic and communication devices instantly within a wide radius, approximately up to 1500 km
The objective of this study is to examine an applicability of the arc thermal metal spraying
In case of EMP shielding material, Fe and Cu were selected for the metal plate and Cu and Zn-Al were selected for the arc thermal metal spraying (ATMS) method
Summary
An electromagnetic pulse (EMP), generated by a nuclear explosion, can neutralize electronic and communication devices instantly within a wide radius, approximately up to 1500 km. The through welded parts, and expensive construction costs [26] To solve this problem, developing a new ATMS method has several properties that can perform as a shielding material. This methodmethod can shield waves,plate form is a shielding coating and control the coating. It is expected to reduce much of the construction method has properties that can perform as a shielding material These attached metal particles, by continued accumulation and consolidation, form a porous and compact metal coating (arc thermal metal spray coating; hereafter, ATMS coating) During this process, when metal particles contact the surface of the substrate, it is quickly cooled to almost room temperature due to compressed air. For the purpose of this study, a SE test against an EMP was carried out to compare the shielding performance between the ATMS coating and metal plate
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