On melting of B4C boron carbide under pressure
Tóm tắt
The pressure dependence of melting temperatures for boron carbide and B4C-carbon eutectic has been studied up to 8 GPa, and it was found that in both cases the melting curves exhibit negative slope (−13 ± 6 K/GPa), that is indicative of higher density of the melt as compared to the solid phase.
Tài liệu tham khảo
Domnich, V., Reynaud, S., Haber, R.A., and Chhowalla, M., Boron Carbide: Structure, Properties, and Stability under Stress, J. Am. Ceram. Soc., 2011, vol. 94, no. 11, pp. 3605–3628.
Oganov, A.R. and Solozhenko, V.L., Boron: a Hunt for Superhard Polymorphs, J. Superhard Mater., 2009, vol. 31, no. 5, pp. 285–291.
Albert, B. and Hillebrecht, H., Boron: Elementary Challenge for Experimenters and Theoreticians, Angew. Chem. Int. Ed., 2009, vol. 48, pp. 8640–8668.
Kurakevych, O.O. and Solozhenko, V.L., Experimental Study and Critical Review of Structural, Thermodynamic and Mechanical Properties of Superhard Refractory Boron Suboxide B6O, J. Superhard Mater., 2011, vol. 33, no. 6, pp. 421–428.
Solozhenko, V.L. and Kurakevych, O.O., Chemical Interaction in the B-BN System at High Pressures and Tempe-ratures. Synthesis of Novel Boron Subnitrides, J. Solid State Chem., 2009, vol. 182, pp. 1359–1364.
Beauvy, M., Stoichiometric Limits of Carbon-Rich Boron Carbide Phases, J. Less-Common Met., 1983, vol. 90, pp. 169–175.
Schwetz, K.A. and Karduck, P., Investigations in the Boron-Carbon System with the Aid of Electron Probe Microanalysis, ibid., 1991, vol. 175, pp. 1–11.
Kasper, B., Phasengleichgewichte im System B-C-N-Si: PhD Thesis, Stuttgart: Univ., 1996.
Khvostantsev, L.G., Slesarev, V.N., and Brazhkin, V.V., Toroid Type High-Pressure Device: History and Prospects, High Press. Res., 2004, vol. 24, pp. 371–383.
Tonkov, E.Yu., High Pressure Phase Transformations: a Handbook Volumes 1, 2 & 3:, Oxford: Taylor & Francis, 1996–1997.
Solozhenko, V.L. and Lathe, C., On the Melting Temperature of B6O, J. Superhard Mater., 2007, vol. 29, no. 4, pp. 259–260.
Solozhenko, V.L., Kurakevych, O.O., Turkevich, V.Z., and Turkevich, D.V., Phase Diagram of the B-B2O3 System at 5 GPa: Experimental and Theoretical Studies, J. Phys. Chem. B., 2008, vol. 112, pp. 6683–6687.