Influence of Gas-Flow Conditions on the Evolution of Thermally Insulating SiN Nano-Felts.

This paper discusses the role of nitrogen (N) gas flow conditions on the formation of silicon nitride (SiN) nano-felts from polysiloxane-impregnated polyurethane (PU) foams. The polymeric foam was converted into an amorphous silicon oxycarbide (SiOC) artefact during pyrolysis, which was then transformed, at a higher temperature, into a SiN felt through a reaction between the decomposition products of SiOC with N. The study identified that a N flux of ~2.