The Particle in-flight characteristics in plasma spraying process measured by phase doppler anemometry (PDA)

Authors

Jian Ma, University of Nevada, Las VegasFollow
S. C.M. YuFollow
H. W. Ng

Document Type

Article

Publication Date

2-2005

Publication Title

Plasma Chemistry and Plasma Processing

Volume

25

Issue

1

First page number:

55

Last page number:

86

Abstract

Detailed measurements of particle in-flight characteristics have been carried out using a PDA system for benchmarking as well as to provide further information to aid the development of simulation models. The parameters studied included four conditions of primary gas flow rate and carrier gas flow rate. The particle velocities, diameters, and the corresponding volume flux at different locations were obtained. Due to the one port particle injection arrangement, it was noted that particles in general sprayed with an angle deviated from the nozzle axis Zn, to the opposite side of the powder feeder port. The particles would also deviate from the spraying cone axis with a divergence angle ( ). The deviation and divergence angles were examined under different plasma spraying conditions. The measurement data rates at different cross-sectional planes were also obtained so as to compare the results derived from the volume flux measurement and the actual coating on a substrate at the equivalent standoff distance. It was found that the spraying area obtained from the measurement-data-rate increased with downstream distance and a linear relationship between spraying area and distance was also established. Comparing the integrated results, it was noted that the spraying areas derived from the measurement data rate were close to the actual spraying areas obtained from the coordinate measurement machine (CMM) results.

Keywords

Experimental; Particle in-flight diagnostics; Plasma spraying

Disciplines

Materials Science and Engineering | Mechanical Engineering

Language

English

Permissions

Use Find in Your Library, contact the author, or use interlibrary loan to garner a copy of the article. Publisher copyright policy allows author to archive post-print (author’s final manuscript). When post-print is available or publisher policy changes, the article will be deposited

Repository Citation

Ma, J., Yu, S. C., Ng, H. W. (2005). The Particle in-flight characteristics in plasma spraying process measured by phase doppler anemometry (PDA). Plasma Chemistry and Plasma Processing, 25(1), 55-86.
https://digitalscholarship.unlv.edu/me_fac_articles/3