In the search for structural materials suitable for high temperatures,
monocrystalline silicon nitride filaments have been synthesized by ca
talyzed chemical vapor deposition. Such a filament with a catalyst par
ticle at the tip is shown in the Figure, The effect of various flow ra
tes of N-2/NH3 and H-2, the X-ray emission spectra, and the mechanical
properties of the filaments are presented.