Dissolution mechanism of solid nickel in liquid zinc saturated with Fe

The dissolution behavior of solid nickel in static liquid zinc saturated with Fe at 723 K was studied. The results show that when immersing solid Ni in liquid Zn saturated with Fe, the intermetallic compound layers consisted of γ and δ phases are formed on nickel substrate, which is the same as that...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2007-06, Vol.17 (3), p.564-569
Main Authors: KONG, Gang, LU, Jin-tang, XU, Qiao-yu
Format: Article
Language:English
Subjects:
dissolution mechanism
liquid zinc
solid nickel
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Summary:The dissolution behavior of solid nickel in static liquid zinc saturated with Fe at 723 K was studied. The results show that when immersing solid Ni in liquid Zn saturated with Fe, the intermetallic compound layers consisted of γ and δ phases are formed on nickel substrate, which is the same as that in liquid pure zinc. However, some Γ 2 particles are formed in the liquid near the solid/liquid interface. These Γ 2 particles can easily heterogeneously nucleate on ζ particles and grow fast. The dissolution process is governed by diffusion of nickel atom across a concentration boundary layer in liquid Zn saturated with Fe, and is different from a mixed control mechanism of nickel in liquid pure zinc. The participation of Γ 2 particles makes the dissolution of solid Ni in the liquid accelerated.
ISSN:1003-6326
DOI:10.1016/S1003-6326(07)60134-4