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Phase transformations of the rhombohedral modification of boron nitride with shock compression

  • Physicochemical and Structural Investigations of Materials
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Powder Metallurgy and Metal Ceramics Aims and scope

Abstract

Features of crystal-orientated transformations of the rhombohedral modification of boron nitride (rBN) into dense modifications of the wurtzite (wBN) and sphalerite (spBN) types with shock compression in the range from 15 to 50 GPa are studied. Three compression schemes are used: in annular ampules (∼15 GPa); in the ampules of K. M. Rabinin (25–35 GPa); in a plane shock wave (∼50 GPa). With an increase in pressure from 15 to 50 GPa and a corresponding change in the loading scheme the degree of rBN transformation into dense modifications increases from 0 to 40%. There is a change in the rBN transformation mechanism: from longitudinal bending of layers (as a result of which wBN forms, and spBN is formed from it) to corrugation leading to spBN formation directly from rBN.

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Authors
  1. A. V. Kurdyumov
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  2. V. F. Britun
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  3. V. I. Kovtun
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  4. A. I. Markov
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  5. V. V. Yarosh
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Additional information

Institute for Problems of Materials Science, Ukraine National Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 9-10(409), pp. 84–88, September–October, 1999.

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Kurdyumov, A.V., Britun, V.F., Kovtun, V.I. et al. Phase transformations of the rhombohedral modification of boron nitride with shock compression. Powder Metall Met Ceram 38, 501–504 (1999). https://doi.org/10.1007/BF02676068

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  • DOI: https://doi.org/10.1007/BF02676068

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