Abstract
In this study we present the results of two experiments. In the first one, a Ta–Al–SS (stainless steel (SS)) multilayer coating structure was prepared using plasma spraying equipment to investigate the coating structure and interface properties. In the second one, Ta–Al on multilayer glass was prepared using the sputtering process to measure the thickness effect of thin film on electromagnetic wave shielding (EMI) characteristics and on the design of high-power switchboard covers. According to the experimental results, the multilayer structure of Ta–Al on SS improves the mechanical properties of a stainless steel plate by enhancing the explosion-proof property. An appropriate thickness of the plasma-sprayed pure aluminum layer can increase the adhesion to the stainless steel substrate and buffer the stress effect. After heat treatment (annealing), the Ta–Al–SS multilayer structural characteristics are excellent and suitable for shielding effects at different temperatures and humidity, which can be used as a reference for the engineering application of communication rooms and base power stations. According to EMI test of multi-coated glass (Ta–Al–glass), by increasing the thickness of Ta layer, we cannot effectively improve full-frequency EMI shielding with improved shielding at low-mid frequency condition. In addition, the Ta–Al interface formation of an Al–Ta–O compound layer can improve the adiabatic effect to reduce the thermal conductivity.
Highlights
Electromagnetic interference (EMI) is a new type of pollution that has been discovered in recent decades
It is worth noting that switchboard covers are made of iron, and the internal layer of switchboards are made of iron, copper wire and insulating oil [3,4,5,6,7]
Previous studies found that Ta and Al have excellent EMI shielding. In these current studies we found that the plasma coating of a stainless-steel
Summary
Electromagnetic interference (EMI) is a new type of pollution that has been discovered in recent decades. The high-density residential environment of Taiwan contains many switchboards [1,2]. It is worth noting that switchboard covers are made of iron, and the internal layer of switchboards are made of iron, copper wire and insulating oil [3,4,5,6,7]. Switchboard covers must contain a strong electromagnetic field, and be fire- and explosion-proof [8,9,10]. The ideal electromagnetic shielding material must effectively protect from strong electromagnetic variable fields, have a light weight, thin thickness and strong mechanical properties [11,12,13]
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