Absorbing Property of Multi-layered Short Carbon Fiber Absorbing Coating

Year 2017, Volume: 30 Issue: 3, 29 - 37, 20.09.2017

Zhaohui Liu Rui Tao , Guodong Ban Ping Luo

Abstract

The radar absorbing coating was prepared with short carbon fiber as
absorbent and waterborne polyurethane (WPU) as matrix resin. The coating’s absorbing property was tested with vector
network analyzer, using aramid honeycomb as air layer which was matched with
carbon fiber coating. The results demonstrate that the single-layered carbon
fiber absorbing coating presented relatively poor absorbing property when the
layer was thin, and the performance was slightly improved after the matched air
layer was adopted. Then the multi-layered carbon fiber absorbing coating was produced
by matching the air layer with absorbing coating of varied carbon fiber
content. Consequently, the absorption intensity
and the band width of effective absorption
were significantly enhanced. According to varied matching methods between
carbon fiber coating and air layer, the composite coating’s reflectivity
reached a minimum of -23dB, and the reflectivity was less than -10dB within the
range of 4-13GHz, the band width of effective absorption
reached 9GHz.

Keywords

short carbon fiber, absorbing coating, multi-layered, absorbing property

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