The influence of Ni additions on the relative stability of eta and eta(') Cu6Sn5

Schwingenschlogl, U., Di Paola, C., Nogita, K. and Gourlay, C. M. (2010) The influence of Ni additions on the relative stability of eta and eta(') Cu6Sn5. Applied Physics Letters, 96 6: 061908-1-061908-3. doi:10.1063/1.3310019

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Author Schwingenschlogl, U.
Di Paola, C.
Nogita, K.
Gourlay, C. M.
Title The influence of Ni additions on the relative stability of eta and eta(') Cu6Sn5
Formatted title
The influence of Ni additions on the relative stability of η and η′ Cu6Sn5
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
1520-8842
Publication date 2010-02-01
Sub-type Article (original research)
DOI 10.1063/1.3310019
Open Access Status File (Publisher version)
Volume 96
Issue 6
Start page 061908-1
End page 061908-3
Total pages 3
Place of publication College Park, United States
Publisher American Institute of Physics
Language eng
Subject 01 Mathematical Sciences
02 Physical Sciences
09 Engineering
Formatted abstract
We investigate how 5 at. % Ni influences the relative stability of η and η′ Cu6Sn5. Synchrotron x-ray diffraction shows that, while Cu6Sn5 exists as η′ at 25 and 150 °C and transforms to η on heating to 200 °C, Cu5.5Ni0.5Sn5 is best fit to η throughout 25–200 °C. Our first principles calculations predict that η′ is stable at T = 0 K in both Cu6Sn5 and Cu5.5Ni0.5Sn5, but that the energy difference is substantially reduced from 1.21 to 0.90 eV per 22 atom cell by the Ni addition. This effect is attributed to Ni developing distinct bonding to both Cu and Sn in the η phase. 
© 2010 American Institute of Physics.
Keyword Ab initio calculations
Copper alloys
Crystal structure
Nickel alloys
Tin alloys
X-ray diffraction
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article number: 061908, pp. 1-3

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2011 Collection
 
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Created: Sun, 28 Feb 2010, 10:07:24 EST