Abstract
A method of adding RAM directly in silica phenolic composite was tested. Due to direct incorporation of RAM, the resultant composite not only can show microwave absorption at normal conditions but can sustain this capability at high heat fluxes. Such RAM added composite becomes more applicable for materials which are exposed to high temperatures. Two different RAM added silica fibre phenolic composites were developed and their RF-absorptions were compared with pure silica fibre phenolic sample. It was found that depending on the type of RAM their RF-absorption can be enhanced. Strength and ablation properties of the resultant composites were also found to alter with the addition of RAM in the composite.
Highlights
radar absorbing materials (RAM) coatings have proved very useful in increasing the microwave absorption of materials
Materials used under normal conditions can be coated with RAM paints to enhance and sustain their microwave absorption capability
In order to verify the effect of RAM in ablatives, silica fiber phenolic composite samples were produced in which barium ferrite and graphene ferrite were incorporated during their production
Summary
RAM coatings have proved very useful in increasing the microwave absorption of materials. If RAM becomes an integral part of the ablative this material can act as a heat shield but will possess microwave absorbing capability even at high temperatures. In order to verify the effect of RAM in ablatives, silica fiber phenolic composite samples were produced in which barium ferrite and graphene ferrite were incorporated during their production.
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