Effect of ultrafine microstructure on interdiffusion-driven phase transformations in Ni-Sn sandwich diffusion couples

Bhattacharjee, Pinaki Prasad and Vaidya, Mayur (2023) Effect of ultrafine microstructure on interdiffusion-driven phase transformations in Ni-Sn sandwich diffusion couples. Materials Today Communications, 35. p. 105843. ISSN 2352-4928

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Abstract

Solid-state diffusion in materials is greatly influenced by microstructural features such as grain boundaries, dislocations, and second phase particles. However, a systematic investigation of structure-kinetics correlation during interdiffusion is largely missing. Herein, a novel sandwich diffusion couple approach was utilized to demonstrate the effects of microstructure on interdiffusion-driven phase formation in the Ni-Sn system. Pure Ni samples were prepared by cold rolling (CR) and spark plasma sintering (SPS) with different microstructures. Two sandwich diffusion couples were prepared– a) NiAM/Sn/NiCR and b) NiCR/Sn/NiSPS, for phase growth analysis at each interface after annealing at 200 °C for 96 h. The intermetallic phase Ni3Sn4 formed at the NiAM/Sn, NiCR/Sn, and NiSPS/Sn interfaces had thickness of 6, 14, and 41 µm, respectively, consistent with larger parabolic growth constant for the NiSPS/Sn interfaces. The enhanced kinetics at the SPS interface could be attributed to the presence of ultrafine-grained (UFG) (∼320 nm) microstructure dominated by high-angle boundaries.

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IITH Creators:

IITH Creators	ORCiD
Bhattacharjee, Pinaki Prasad	http://orcid.org/0000-0002-6422-2601
Vaidya, Mayur	https://orcid.org/0000-0001-7866-7348

Item Type:

Article

Uncontrolled Keywords:

Diffusion couple; Interdiffusion; Microscopy; Phase growth; Ultrafine microstructure; Grain boundaries; Binary alloys; Cold rolling; Diffusion in solids; Microstructure; Spark plasma sintering; Tin; Diffusion couple; Grain boundary dislocation; Interdiffusion; Microstructural features; Phase growth; Phases transformation; Plasma sintering; Solid-state diffusion; Spark-plasma-sintering; Ultrafine microstructures

Subjects:

Materials Engineering > Materials engineering
Materials Engineering > Nanostructured materials, porous materials

Divisions:

Department of Material Science Engineering

Depositing User:

Mr Nigam Prasad Bisoyi

Date Deposited:

05 Jan 2024 14:21

Last Modified:

05 Jan 2024 14:21

URI:

http://raiithold.iith.ac.in/id/eprint/11771