Abstract
The model developed in Part I of this study, has been extended to a ZrO 2 particle here. It was found that the temperature and the velocity of a ZrO 2 particle, computed by assuming a constant average plasma temperature, deviate significantly from those calculated by considering the variation of the plasma temperature with the distance from the nozzle, as in the actual case. Again, it was found that the particle size reduction due to vaporisation cannot be neglected for particles moving close to the axis of the flame. The injection distance and the injection velocity were identified as two important spray parameters. It was noted that ZrO 2 particles within a certain size range should be used for developing coatings. The computations also revealed that the particles travelling in the peripheral region of the flame, do not undergo complete melting. It was experimentally verified that the particle size reduces significantly due to vaporisation.
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