Interdiffusion and solid solution strengthening in Ni-Co-Pt and Ni-Co-Fe ternary systems

Divya, VD and Ramamurty, U and Paul, A (2013) Interdiffusion and solid solution strengthening in Ni-Co-Pt and Ni-Co-Fe ternary systems. In: Philosophical Magazine, 93 (17). pp. 2190-2206.

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Abstract

Diffusion couple experiments are conducted in Co-Ni-Pt system at 1200 degrees C and in Co-Ni-Fe system at 1150 degrees C, by coupling binary alloys with the third element. Uphill diffusion is observed for both Co and Ni in Pt rich corner of the Co-Ni-Pt system, whereas in the Co-Ni-Fe system, it is observed for Co. Main and cross interdiffusion coefficients are calculated at the composition of intersection of two independent diffusion profiles. In both the systems, the main interdiffusion coefficients are positive over the whole composition range and the cross interdiffusion coefficients show both positive and negative values at different regions. Hardness measured by performing the nanoindentations on diffusion couples of both the systems shows the higher values at intermediate compositions.

Item Type:	Journal Article
Publication:	Philosophical Magazine
Publisher:	Taylor and Francis Group
Additional Information:	Copyright of this article belongs to Taylor and Francis Group.
Keywords:	Diffusion; Hardness; Indentation; Co-Ni-Pt; Co-Ni-Fe
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	21 Aug 2013 06:20
Last Modified:	21 Aug 2013 06:20
URI:	http://eprints.iisc.ac.in/id/eprint/46989

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