Structural and Microstructural Properties of Si-C and Si-C-B Powders Obtained by High-Energy Ball Milling

Abstract:

This work evaluated on the structural modification during high-energy ball milling of the Si-50C, Si-42.9C-19.1B e Si-33.3C-44.4B (at.-%) powder mixtures from elemental powders. Electron images revealed on occurrence of continuous fracture mechanisms in brittle particles during their processing, which presented rounded particles lower than 10 μm. X-ray diffraction results of Si-50C powders indicated that the intensity of Si peaks was slightly reduced after milling for 17 h, which were moved to the direction of larger diffraction angles after 7 h of milling, suggesting that carbon atoms were dissolved into the Si lattice in order to form an extended solid solution. Following, these values were increased due to the discrete exothermic formation of the SiC compound. In Si-C-B powder mixtures, the SiC and B4C compounds were formed after milling for 7 h.

• Periodical: Materials Science Forum (Volume 869)
• Pages: 19-24
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.869.19
• Online since: August 2016
• Authors: Lucas Ferreira*, D.S. Mégda, A.C. de Souza, Rodrigo Fernando Costa Marques, Erika Coaglia Trindade Ramos, Vanessa Motta Chad, Alfeu Saraiva Ramos
• Keywords: Carbides, High-Energy Ball Milling, Phase Transformation

References

[1] B.M. Moshtaghioun, F.L. Cumbrera, A.L. Ortiz, M. C. -Rodríguez, D. G. -García. Additive-free superhard B4C with ultrafine-grained dense microstructures. J Eur Ceram Soc, 34 (2014), 841-848.

DOI: 10.1016/j.jeurceramsoc.2013.10.006

[2] Z. Zhang, X. Du, J. Wang, W. Wang, Y. Wang, Z. Fu, Synthesis and structural evolution of B4C–SiC nanocomposite powders by mechanochemical processing and subsequent heat treatment. Powder Technol. 254 (2014) 131-136.

DOI: 10.1016/j.powtec.2013.12.055

[3] Z. Zhang, X. Du, W. Wang, Z. Fu, H. Wang, Preparation of B4C-SiC composite ceramics through hot pressing assisted by mechanical alloying. Int J Refract Met H. 41 (2013) 270-275.

DOI: 10.1016/j.ijrmhm.2013.04.012

[4] R.W. Olesinski, G.J. Abbaschian. The C-Si (Carbon-Silicon) System. Bulletin of Alloy Phase Diagrams, v. 5 (4), (1984).

DOI: 10.1007/bf02872902

[5] B. Predell, B-C System. Landolt-Börnstein - Group IV Phys Chem. 12B (2012)  25-26.

[6] P.J. Schields, Bragg's Law and Diffraction: How wav es reveal the atomic structure of crystals. Center for High Pressure Research Department of Earth & Space Sciences State University of New York at Stony Brook Stony Brook, NY 11794-2100. http: /www. eserc. stonybrook. edu/ProjectJava/Bragg.

DOI: 10.22606/jan.2016.12002

[7] T Fujii, Y Mori, H Hyodo, K Kimura, X-ray diffraction study of B4C under high pressure. J Phys.: Conference Series 215 (2010) 01 (2011).

DOI: 10.1088/1742-6596/215/1/012011

[8] J.A. Bigdelo, A.M. Hadian, Synthesis of High Purity Micron Size Boron Carbide Powder from B2O3/C Precursor. International Journal of Recent Trends in Engineering, 1 (2009) 176-180.

[9] M. Somayazulu, J. Akella, S.T. Weir, D. Häusermann, G. Shen, X-ray Diffraction Measurements on B4C Boron Carbide at High Pressures and High Temperatures. http: /www. aps. anl. gov/apsar2000/zulu1. pdf.

[10] E.M. Sharifi, F. Karimzadeh, M.H. Enayati, Mechanochemical assisted synthesis of B4C nanoparticles, Adv Powder Technol. 22 (2011) 354–358.

DOI: 10.1016/j.apt.2010.05.002

[11] JCPDS: International Centre for Diffraction Date, Powder Diffraction File (Inorganic Phases) two volumes, first ed., Swarthmore, (1988).

[12] W. Kraus, G. Nolze, Powdercell - a program for the representation and manipulation of crystal structures and calculation of the resulting X-ray powder patterns, J. Appl. Cryst. 29 (1996) 301–303.

DOI: 10.1107/s0021889895014920