0
TECHNICAL PAPERS: Heat Transfer in Manufacturing

Role of Solidification, Substrate Temperature and Reynolds Number on Droplet Spreading in Thermal Spray Deposition: Measurements and Modeling

[+] Author and Article Information
Y. P. Wan

Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-2275e-mail: Yuepeng.Wan@sunysb.edu

H. Zhang

Department of Mechanical Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-2300e-mail: hzhang@pml.eng.sunysb.edu

X. Y. Jiang, S. Sampath

Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-2275

V. Prasad

Department of Mechanical Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-2300e-mail: prasad@pml.eng.sunysb.edu

J. Heat Transfer 123(2), 382-389 (Dec 07, 2000) (8 pages) doi:10.1115/1.1351893 History: Received May 13, 1999; Revised December 07, 2000
Copyright © 2001 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
(a) Optical image (using Zygo) showing the morphology of Molybdenum splats on Molybdenum substrate, and (b) surface profile of a typical splat
Grahic Jump Location
Schematic of the droplet deposition process and the relevant geometry
Grahic Jump Location
Statistical comparison between the calculated flattening degree with experimental data for molybdenum on molybdenum, molybdenum on glass and PSZ on steel. (Mo-Steel data are very close to the Mo-Mo data, and hence are not presented here.)
Grahic Jump Location
Change of splat thickness due to spreading (upper part of the curves) and the thickness of solidified layer (lower part) for a molybdenum splat impinging on Mo and glass, respectively, and PSZ on steel
Grahic Jump Location
Viscous dissipation dominating region is above the lines representing the criteria for different materials. The shadowed area represents the typical droplet conditions in plasma spraying.
Grahic Jump Location
Dependence of flattening degree on droplet diameter and impacting velocity for molybdenum droplets on two different substrate materials
Grahic Jump Location
Relationship between the flattening degree and Reynolds number. Curves represent the correlation, and scattered values are calculated flattening degree for droplets with different sizes and different velocities by solving Eq. (1) and Eq. (5).
Grahic Jump Location
Dependence of flattening degree on substrate temperature for different materials
Grahic Jump Location
Dependence of flattening degree on droplet overheating
Grahic Jump Location
Thickness of a molybdenum splat and the solidified layer showing the influence of thermal contact resistance (m2 K/W) on spreading and solidification

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In