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

Published online by Cambridge University Press:  10 February 2011

D. Sauter ,
S. Schempp ,
M. Weinmann ,
A. Müller ,
J. Bill ,
P. Lamparter  and
F. Aldinger
D. Sauter
Affiliation:
Universität Stuttgart, Institut für Nichtmetallische Anorganische Materialien, Pulvermetallurgisches Laboratorium, Heisenbergstr. 5, 70569 Stuttgart
S. Schempp
Affiliation:
Max-Planck-Institut für Metallforschung, Seestraβe 92, 70174 Stuttgart
M. Weinmann
Affiliation:
Max-Planck-Institut für Metallforschung, Heisenbergstr. 5, 70569 Stuttgart
A. Müller
Affiliation:
Universität Stuttgart, Institut für Nichtmetallische Anorganische Materialien, Pulvermetallurgisches Laboratorium, Heisenbergstr. 5, 70569 Stuttgart
J. Bill
Affiliation:
Universität Stuttgart, Institut für Nichtmetallische Anorganische Materialien, Pulvermetallurgisches Laboratorium, Heisenbergstr. 5, 70569 Stuttgart
P. Lamparter
Affiliation:
Max-Planck-Institut für Metallforschung, Seestraβe 92, 70174 Stuttgart
F. Aldinger
Affiliation:
Max-Planck-Institut für Metallforschung, Heisenbergstr. 5, 70569 Stuttgart Universität Stuttgart, Institut für Nichtmetallische Anorganische Materialien, Pulvermetallurgisches Laboratorium, Heisenbergstr. 5, 70569 Stuttgart
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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 (RG) 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 576: Symposium DD – Organic/Inorganic Hybrid Materials II , 1999 , 39
Copyright
Copyright © Materials Research Society 1999

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References

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