RT Journal Article ID 29a772723a4a7316 A1 Janisson, S. A1 Vardelle, Armelle A1 Vardelle, Michel A1 Fauchais, Pierre A1 Meillot, Erick T1 PLASMA SPRAYING OF BORON CARBIDE USING TERNARY GAS MIXTURES JF High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes JO HTM YR 2010 FD 2012-03-19 VO 14 IS 4 SP 379 OP 388 K1 plasma spraying K1 ternary gas mixtures K1 gas transport properties K1 particle spray pattern K1 particle velocity K1 surface temperature AB Materials which exhibit high specific heat and melting enthalpy combined with a low density, like boron carbide B4C, are difficult to melt by plasma spraying under standard spray conditions. Moreover, the injection of this low-density powder in the plasma jet is critical, especially when fine particles are used. The optimization of the plasma-forming gas composition may make the penetration of the particles in the gas flow easier, and improve their melting state. This paper presents an investigation of the effect of the composition of ternary gas mixtures of argon, helium and hydrogen on B4C particles heating and acceleration. The particle injection and the resulting spray pattern in the jet were controlled by using a 1D imaging technique. The particle velocity distribution was measured with a laser Doppler anemometer and the particle overall temperature with a high-speed pyrometer. PB Begell House LK https://www.dl.begellhouse.com/journals/57d172397126f956,53ff946b54ebd0fc,29a772723a4a7316.html