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Interdiffusion in the Ni-Zr System

Paul, Tanaji and Paul, Aloke (2015) Interdiffusion in the Ni-Zr System. In: JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION, 36 (4). pp. 381-389.

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Official URL: http://dx.doi.org/10.1007/s11669-015-0393-3

Abstract

Interdiffusion study is conducted in the Ni-Zr system in the temperature range of 750-850 A degrees C. Five intermetallic compounds, Ni5Zr, Ni7Zr2, Ni10Zr7, NiZr and NiZr2 are found to grow in the interdiffusion zone. Integrated diffusion coefficients are estimated for different phases. Activation energy is found to be lowest for Ni10Zr7 (178 +/- A 8 kJ/mol) and highest for NiZr (323 +/- A 6 kJ/mol). Tracer diffusion coefficients are estimated at the location of the Kirkendall marker plane in the Ni7Zr2 phase. Ni is found to have 10 times higher diffusion rate compared to Zr in this phase. Higher diffusion rate of Ni compared to Zr is found, which is expected because of higher number of Ni-Ni bonds compared to Zr-Zr bonds in this phase.

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Keywords: defects; diffusion; intermetallic compounds; microstructure
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 11 Aug 2015 06:39
Last Modified: 11 Aug 2015 06:39
URI: http://eprints.iisc.ernet.in/id/eprint/52057

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