Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1500663 | Scripta Materialia | 2011 | 4 Pages |
Abstract
Nanocrystalline metals frequently exhibit poor thermal stability, and the exothermic peak in differential scanning calorimetry is usually attributed to grain growth. We show from experiments on electrodeposited nano-Ni with varying levels of S, and tests with microcrystalline Ni and S powders, that the exothermic peak is associated with the formation of a nickel sulfide phase and concurrent grain growth. Analysis suggests that segregation plays a more important role in limiting grain growth than second-phase particles in nano-Ni.
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Physical Sciences and Engineering
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Authors
M.J.N.V. Prasad, A.H. Chokshi,