Abstract
Gas atomization is widely practised for the production of rapidly solidified powder and spray deposits. The most common operating modes in gas atomization are the gravity or free fall and the aspirating or closed couple modes. In this study, static pressure measurements at the tip of the delivery tube were made in a closed atomizer for different tube tip designs using a double Coanda nozzle arrangement. These measurements coupled with gas and melt visualization using CO 2 and water were used to identify delivery tube/gas nozzle positions that would subsequently yield successful atomization. Gas atomization of zinc was then carried out and visualization of the melt spray revealed that an aspirating mode can be achieved at a ratio of gas aspirating to melt gravity force of 0.16N. Furthermore, the aspirating mode of atomization is shown to yield a narrower size distribution than the gravity mode at the same gas/metal ratio. Thus, controlled atomizer performance may be achieved by the proper placement of the delivery tube for a given gas nozzle.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
