Structural characterisation of B4C films deposited by laser-assisted CVD

Influence of carbon content on the crystallographic structure of boron carbide films

“…The relative amount of the carbon and boron precursors in the reactive atmosphere can be characterised by the parameter φ = ϕ CH4 /(ϕ CH4 + ϕ BCl3 ). In this study, φ took values between 0.15 and 0.29, which were optimised to achieve homogeneous deposits of B 4 C, as reported previously [8,9]. Thickness profiles were obtained by optical profilometry and the microstructure was examined by scanning electron microscopy (SEM).…”

“…The experimental apparatus used for the experiments was already described in reference [8]. The CO 2 laser was operated in cw TEM 00 mode at a wavelength of 10.6 µm and impinges the substrate surface at perpendicular incidence, with a diameter of 13 mm.…”

A fast-pyrolysis self-propagating high temperature synthesis route to single phase of boron carbide ultrafine powders

“…17)19) The rest two weak broad bands can be observed at 1353 and 1583 cm ¹1 . They correspond to the D and G peaks of residual graphitic carbon, 20) indicating little free carbon coexisted in the as-synthesized B 13 C 2 sample.…”

CVD Chemistry of Organoborons for Boron-Carbon Thin Film Depositions

“…CF4, Ar, CO2 ) where they get ionized. Due to the bad oxidation resistance and poor electrical conductivity of elemental boron, the most stable compound of boron -10 B4C has been studied as the neutron converting thin layer for neutron detectors due to its excellent thermal stability and chemical resistance [16], as well as the better conductivity than elemental boron. The basic principle of the thin solid film based new generation neutron detectors is similar to 3 He gas detectors except that the used neutron converting material is a thin solid layer of 10 B4C (on a base material like Al) instead of 3 He gas.…”