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X-Ray And Neutron Small Angle Scattering Investigations On Precursor Derived B-C-N Ceramics

  • D. Sauter (a1), S. Schempp (a2), M. Weinmann (a3), A. Müller (a1), J. Bill (a1), P. Lamparter (a2) and F. Aldinger (a3) (a1)...

Abstract

Amorphous 11B31,9C36,8N31,3 ceramic samples were produced by thermolysis of poly(borosesquicarbodiimide) of idealized formula [B2(NCN)3]n at 1100°C in inert gas atmosphere. Small angle scattering (SAS) experiments reveal, that the as-obtained ceramics are chemically inhomogeneous. Using small angle neutron and X-ray scattering measurements, the temperature dependency of the medium range order was investigated. The SAS curves show a strong temperature dependence of the Guinier-radius (R G ) of the scattering regions. Contrast variation by X-ray and neutron diffraction shows that the observed SAS signal is caused by amorphous BC2N enclosing amorphous boron-nitride segregations. The fact, that the measured invariant remains constant over the whole temperature range supports the view of complete phase separation.

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X-Ray And Neutron Small Angle Scattering Investigations On Precursor Derived B-C-N Ceramics

  • D. Sauter (a1), S. Schempp (a2), M. Weinmann (a3), A. Müller (a1), J. Bill (a1), P. Lamparter (a2) and F. Aldinger (a3) (a1)...

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