The effect of Ni on the growth morphology of primary β-phase in an In-35 wt%Sn alloy

•β-In3Sn evolution in In-35Sn-0.05Ni was observed by in-situ synchrotron radiography.•Ni significantly affect the β-In3Sn structure and morphology during solidification.•Ni causes the mean growth rate of the primary arm at the early stage to be decreased.•Elimination of primary arm tip was seen in I...

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Bibliographic Details
Published in:Journal of alloys and compounds 2022-03, Vol.897, p.163172, Article 163172
Main Authors: Chang, M.S., Salleh, M.A.A. Mohd, Halin, D.S.C., Ramli, M.I.I., Yasuda, H., Nogita, K.
Format: Article
Language:English
Subjects:
Alloys
Beta phase
Cellular structure
Columnar structure
Dendritic structure
Evolution
Metallography
Metals and alloys
Microstructure
Morphology
Nickel
Scanning electron microscopy
Solidification
Superconductivity
Superconductors
Synchrotron radiation
Synchrotrons
Thermal analysis
Thermodynamic properties
Tin base alloys
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Summary:•β-In3Sn evolution in In-35Sn-0.05Ni was observed by in-situ synchrotron radiography.•Ni significantly affect the β-In3Sn structure and morphology during solidification.•Ni causes the mean growth rate of the primary arm at the early stage to be decreased.•Elimination of primary arm tip was seen in In-35Sn-0.05Ni alloy.•Seaweed structure was seen in later stage solidification of In-35Sn-0.05Ni alloy. In-35 wt%Sn alloy is a superconductive alloy and its superconductivity is highly dependent on the properties of the β-In3Sn phase. However, detail solidification behaviour with microstructure development had not been studied with minor element additions. This paper investigates the effect of minor addition of Ni on the β-phase evolution in an In-35 wt%Sn alloy during the solidification process using the in-situ real-time synchrotron radiography technique. The β-phase preferably formed a columnar dendritic structure that made a transition to a mix structure of cellular and dendrite with a unique morphology with an addition of 0.05 wt%Ni. The findings provide detailed observations of microstructure evolution, specifically β-In3Sn phase, and examine the effects of Ni addition during solidification of the In-35 wt%Sn alloy, as well as the thermal properties of the alloys by differential scanning calorimeter.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2021.163172