Measurement of Sn and In Solidification Undercooling and Lattice Expansion Using In Situ X-Ray Diffraction
Abstract
The solidification behavior of two low-melting-point metals, Sn and In, on three substrates has been examined using in situ x-ray diffraction. Undercoolings of up to 56.1°C were observed for Sn solidified on graphite, which is a non-wetting substrate, while lower undercoolings were observed for Sn on Au/Ni/Cu (17.3°C) and on Cu (10.5°C). Indium behaved quite differently, showing undercoolings of less than 4°C on all three substrates. The lattice expansion/contraction behavior of Sn, In, and intermetallic compounds (IMCs) that formed during the reaction of Sn with Au/Ni/Cu surfaces were also measured during heating and cooling. Results showed anisotropic and nonlinear expansion of both Sn and In, with a contraction, rather than expansion, of the basal planes of In during heating. The principal IMC that formed between Sn and the Au/Ni/Cu surface was characterized as Cu6Sn5, having an average expansion coefficient of 13.6 × 10₋6/°C, which is less than that of Sn or Cu.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1226957
- Report Number(s):
- LLNL-JRNL-435591
Journal ID: ISSN 0361-5235
- Grant/Contract Number:
- AC52-07NA27344; AC05- 00OR22725; W-31-109-ENG-38
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Electronic Materials
- Additional Journal Information:
- Journal Volume: 40; Journal Issue: 2; Journal ID: ISSN 0361-5235
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; In situ x-ray diffraction; solidification, nucleation; undercooling; Sn; In; lead-free solders; wetting; nonlinear expansion; intermetallic compounds; synchrotron radiation
Citation Formats
Elmer, John W., and Specht, Eliot D. Measurement of Sn and In Solidification Undercooling and Lattice Expansion Using In Situ X-Ray Diffraction. United States: N. p., 2010.
Web. doi:10.1007/s11664-010-1438-3.
Elmer, John W., & Specht, Eliot D. Measurement of Sn and In Solidification Undercooling and Lattice Expansion Using In Situ X-Ray Diffraction. United States. https://doi.org/10.1007/s11664-010-1438-3
Elmer, John W., and Specht, Eliot D. Wed .
"Measurement of Sn and In Solidification Undercooling and Lattice Expansion Using In Situ X-Ray Diffraction". United States. https://doi.org/10.1007/s11664-010-1438-3. https://www.osti.gov/servlets/purl/1226957.
@article{osti_1226957,
title = {Measurement of Sn and In Solidification Undercooling and Lattice Expansion Using In Situ X-Ray Diffraction},
author = {Elmer, John W. and Specht, Eliot D.},
abstractNote = {The solidification behavior of two low-melting-point metals, Sn and In, on three substrates has been examined using in situ x-ray diffraction. Undercoolings of up to 56.1°C were observed for Sn solidified on graphite, which is a non-wetting substrate, while lower undercoolings were observed for Sn on Au/Ni/Cu (17.3°C) and on Cu (10.5°C). Indium behaved quite differently, showing undercoolings of less than 4°C on all three substrates. The lattice expansion/contraction behavior of Sn, In, and intermetallic compounds (IMCs) that formed during the reaction of Sn with Au/Ni/Cu surfaces were also measured during heating and cooling. Results showed anisotropic and nonlinear expansion of both Sn and In, with a contraction, rather than expansion, of the basal planes of In during heating. The principal IMC that formed between Sn and the Au/Ni/Cu surface was characterized as Cu6Sn5, having an average expansion coefficient of 13.6 × 10₋6/°C, which is less than that of Sn or Cu.},
doi = {10.1007/s11664-010-1438-3},
journal = {Journal of Electronic Materials},
number = 2,
volume = 40,
place = {United States},
year = {Wed Dec 15 00:00:00 EST 2010},
month = {Wed Dec 15 00:00:00 EST 2010}
}
Web of Science
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