Characterization of the Materials Synthesized by High Pressure-High Temperature Treatment of a Polymer Derived t-BC₂N Ceramic

Wallace R Matizamhuka; Iakovos Sigalas; Mathias Herrmann; Leonid Dubronvinsky; Natalia Dubrovinskaia; Nobuyoshi Miyajima; Gabriela Mera; Ralf Riedel

doi:10.3390/ma4122061

Characterization of the Materials Synthesized by High Pressure-High Temperature Treatment of a Polymer Derived t-BC₂N Ceramic

Materials (Basel). 2011 Nov 29;4(12):2061-2072. doi: 10.3390/ma4122061.

Authors

Wallace R Matizamhuka^{1

2}, Iakovos Sigalas^{3

4}, Mathias Herrmann⁵, Leonid Dubronvinsky⁶, Natalia Dubrovinskaia⁷, Nobuyoshi Miyajima⁸, Gabriela Mera⁹, Ralf Riedel¹⁰

Affiliations

¹ E6 Advanced Materials, Element Six (Production) (Pty) Ltd, 1 Debid Road Nuffield, Springs 1559, South Africa. wallace.matizamhuka@e6.com.
² School of Chemical & Metallurgical Engineering, University of the Witwatersrand, P.Bag 3, Johannesburg Wits 2050, South Africa. wallace.matizamhuka@e6.com.
³ School of Chemical & Metallurgical Engineering, University of the Witwatersrand, P.Bag 3, Johannesburg Wits 2050, South Africa. iakovos.sigalas@wits.ac.za.
⁴ DST/NRF Centre of Excellence in Strong Materials, Physics Building, University of the Witwatersrand, Johannesburg 2000, South Africa. iakovos.sigalas@wits.ac.za.
⁵ Fraunhofer Institute for Ceramic Technologies & Systems, Winterbergstr. 28, Dresden 01277, Germany. mathias.herrmann@ikts.fhg.de.
⁶ Bayerisches Geoinstitut, Universität Bayreuth, Universitätstr. 30, Bayreuth 95447, Germany. leonid.dubrovinsky@uni-bayreuth.de.
⁷ Materialphysik und Technologie, Lehrstuhl für Kristallographie, Universitüt Bayreuth, Universitätstr. 30, Bayreuth 95447, Germany. natalia.dubrovinskaia@geow.uni-heidelberg.de.
⁸ Bayerisches Geoinstitut, Universität Bayreuth, Universitätstr. 30, Bayreuth 95447, Germany. nobuyoshi.miyajima@uni-bayreuth.de.
⁹ FG Disperse Feststoffe, Institut für Materialwissenschaft, Technische Universität Darmstadt, Petersenstr. 32, Darmstadt 64287, Germany. mera@materials.tu-darmstadt.de.
¹⁰ FG Disperse Feststoffe, Institut für Materialwissenschaft, Technische Universität Darmstadt, Petersenstr. 32, Darmstadt 64287, Germany. riedel@materials.tu-darmstadt.de.

Abstract

Bulk B-C-N materials were synthesized under static high thermobaric conditions (20 GPa and 2,000 °C) in a multianvil apparatus from a polymer derived t-BC_1.97N ceramic. The bulk samples were characterised using X-ray synchrotron radiation and analytical transmission electron microscopy in combination with electron energy loss spectroscopy. Polycrystalline B-C-N materials with a cubic type structure were formed under the applied reaction conditions, but the formation of a ternary cubic diamond-like c-BC₂N compound, could not be unambiguously confirmed.

Keywords: X-ray diffraction; boron carbonitride; polymer-derived ceramics; sintering; spectroscopy.