Influence of Carbon Content on the Crystallographic Structure of Boron Carbide Films

Details Influence of Carbon Content on the Crystallographic Structure of Boron Carbide Films Influence of Carbon Content on the Crystallographic Structure of Boron Carbide Films

2002-10-18

arxiv.org/abs/cond-mat/0210417v1

Surface and Coatings Technology 125 (2000) 141

Physics

Condensed Matter

Materials Science

9 pages, 5 figures

Scientific paper

Boron carbide thin films were synthesised by laser-assisted chemical vapour deposition (LCVD), using a CO2 laser beam and boron trichloride and methane as precursors. Boron and carbon contents were measured by electron probe microanalysis (EPMA). Microstructural analysis was carried out by Raman microspectroscopy and glancing incidence X-ray diffraction (GIXRD) was used to study the crystallographic structure and to determine the lattice parameters of the polycrystalline films. The rhombohedral-hexagonal boron carbide crystal lattice constants were plotted as a function of the carbon content, and the non-linear observed behaviour is interpreted on the basis of the complex structure of boron carbide. Keywords: Boron carbide; Laser CVD; crystallographic structure; micro-Raman spectroscopy.

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