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