Campus Units
Materials Science and Engineering, Center for Bioplastics and Biocomposites
Document Type
Article
Publication Version
Published Version
Publication Date
2016
Journal or Book Title
Scientific Reports
Volume
6
First Page
21864
DOI
10.1038/srep21864
Abstract
Phase-change materials, such as meta-stable undercooled (supercooled) liquids, have been widely recognized as a suitable route for complex fabrication and engineering. Despite comprehensive studies on the undercooling phenomenon, little progress has been made in the use of undercooled metals, primarily due to low yields and poor stability. This paper reports the use of an extension of droplet emulsion technique (SLICE) to produce undercooled core-shell particles of structure; metal/oxide shell-acetate (‘/’ = physisorbed, ‘-’ = chemisorbed), from molten Field’s metal (Bi-In-Sn) and Bi-Sn alloys. These particles exhibit stability against solidification at ambient conditions. Besides synthesis, we report the use of these undercooled metal, liquid core-shell, particles for heat free joining and manufacturing at ambient conditions. Our approach incorporates gentle etching and/or fracturing of outer oxide-acetate layers through mechanical stressing or shearing, thus initiating a cascade entailing fluid flow with concomitant deformation, combination/alloying, shaping, and solidification. This simple and low cost technique for soldering and fabrication enables formation of complex shapes and joining at the meso- and micro-scale at ambient conditions without heat or electricity.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright Owner
Macmillan Publishers Limited
Copyright Date
2016
Language
en
File Format
application/pdf
Recommended Citation
Çınar, Simge; Tevis, Ian; Chen, Jiahao; and Thuo, Martin M., "Mechanical Fracturing of Core-Shell Undercooled Metal Particles for Heat-Free Soldering" (2016). Materials Science and Engineering Publications. 235.
https://lib.dr.iastate.edu/mse_pubs/235
Comments
This article is published as Çınar, Simge, Ian D. Tevis, Jiahao Chen, and Martin Thuo. "Mechanical fracturing of core-shell undercooled metal particles for heat-free soldering." Scientific Reports 6 (2016), doi:10.1038/srep21864. Posted with permission.