In-Flight Particle Behavior Measured by DPV-2000 System under Low Pressure Condition

Abstract:

It is known that the micro-structure of coatings produced by low pressure plasma spraying (LPPS) is significantly different from the one produced by atmospheric plasma spraying (APS). Because of the different pressures between the inside and the outside of the plasma gun, the exiting plasma jet experiences unconventional behavior related to supersonic expansion at reduced pressure. In this work, the DPV 2000 system was used to measure in-flight particle velocity and temperature. Alumina powder was injected as sprayed particles under 150 mbar conditions. These preliminary researches are the starting points for development and optimization of this process.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 2063-2066
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.2063
• Online since: May 2013
• Authors: Nan Nan Zhang, Bin He, Zhong Li Zhang, De Yuan Li, Marie Pierre Planche, Christian Coddet
• Keywords: In-Flight Particles Characteristics, Low Pressure Plasma Spraying, Optical Diagnostics, Particle Temperature, Particle Velocity

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