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

• Published in: Journal of alloys and compounds Vol. 897; p. 163172
• Main Authors: Chang, M.S., Salleh, M.A.A. Mohd, Halin, D.S.C., Ramli, M.I.I., Yasuda, H., Nogita, K.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.03.2022; Elsevier BV
• 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; Scanning electron microscopy; Metallography; Metals and alloys; Thermal analysis; Microstructure; Synchrotron radiation
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2021.163172

•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.