NSF award 2531907 · University of Arizona

ISS: Collaborative Research: Acoustic Wave Manipulation of Solder-Joint Defects in Reduced-Gravity Environments

Final report due

29 December 2028

in 803 days · The award ends on 31 August 2028.

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award ending 2028-08-31 · Research.gov
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PAPPG 24-1: “at least 45 days prior to the end date”
No-cost extension notice21 Aug 2028in 673 days
award ending 2028-08-31 · Research.gov
PAPPG 24-1: “at least ten calendar days prior to the end date”
Final report due29 Dec 2028in 803 days
award ending 2028-08-31 · Research.gov
PAPPG 24-1: “no later than 120-days following the end date of the award”
Project outcomes report due29 Dec 2028in 803 days
award ending 2028-08-31 · Research.gov
PAPPG 24-1: “no later than 120 days following the end date”
Award is closed out29 Dec 2028in 803 days
award ending 2028-08-31 · Research.gov
PAPPG 24-1: “financially closed out 120 days after their expiration date”

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NSF lists this award's end date as 31 August 2028.
NSF rules say the final report is due no later than 120 days after that.
So the final report is due by 29 December 2028.

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Award card

Award number: 2531907
Period of support: 1 Sep 2025 – 31 Aug 2028
Amount: $171,525
Awardee: University of Arizona, Tucson, AZ
Program: Special Initiatives
Directorate: ENG

Abstract

The strength of solder joints can be reduced by pores caused by bubbles trapped during the soldering process. Small bubbles are especially likely to be trapped because their buoyancy is relatively weak, especially in reduced-gravity environments; hence, they do not quickly rise to the surface. This research project will explore acoustic waves as a means of quickly expelling small bubbles from molten solder. Acoustic…

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