Spray Deposition: A Fundamental Study of Droplet Impingement, Spreading and Consolidation.
Abstract
In spray deposition via the Osprey process a stream of molten metal is atomized by an inert gas to form a spray of liquid droplets. The droplets are cooled by the deposit. Current research at Drexel Univ. is directed towards a fundamental science-based understanding of the spray deposition process and involves both theoretical and experimental studies. A computer model of the spray deposition process has been developed to predict velocity and temperature profiles of the metal droplets in flight. This model takes into account the undercooling and solidification of the droplets. Another computer model has been developed to predict how the droplets spread and consolidate upon impingement with the substrate. Experiments were designed to verify the predictions made by the two models and also to determine the most influential spray depostion process parameters. Short-exposure still photography has been used to estimate droplet velocities. To study the extent of solidification of individual droplets, glass slides have been traversed through the metal spray.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1986
- Accession Number
- ADA173858
Entities
People
- Alan Lawłey
- D. Apelian
- G. Gillen
- P. Mathur
Organizations
- Drexel University