Zn Diffusion in Binary Base of Light Mg-Al Alloys

Jiří Čermák; Ivo Stloukal

doi:10.4028/www.scientific.net/DDF.263.165

Paper Titles

The Influence of Thermodynamic Properties of Alloys on Effective Interdiffusion Coefficients in Ternary Systems
p.141

Iron-Based Nanocomposite Synthesised by Microwave Plasma Decomposition of Iron Pentacarbonyl
p.147

Diffusion of Carbon and Manganese in Fe-C-Mn
p.153

Tracer Diffusion of Molybdenum in Crystallized Fe_79-yMo₈Cu₁B_12+y Alloy
p.159

Zn Diffusion in Binary Base of Light Mg-Al Alloys
p.165

Simulation of Precipitates Evolution in Steels
p.171

Surface Diffusion and Island Growth
p.177

Diffusional Growth Kinetics of Boride Layers at the 13% Cr Steel Interface with Amorphous Boron
p.183

Diffusion of Zinc in Two-Phase Mg-Al Alloy
p.189

HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 263Zn Diffusion in Binary Base of Light Mg-Al Alloys

Zn Diffusion in Binary Base of Light Mg-Al Alloys

Abstract:

Heterodiffusion of 65Zn in Mg, Mg – x Al (x = 1.77, 3.9 and 9 wt.% Al) and in the commercial AZ91 alloy was studied in the temperature interval 498 – 848 K by serial sectioning and residual activity methods. The concentration and temperature dependence of Zn bulk diffusion coefficient D is described by the relation D = exp (0.1 × cAl – 9.16) × exp (-125.8 kJ mol-1/RT) m2 s-1 (cAl – concentration of Al in wt.%). Zn grain boundary diffusivity P = s δ Db (s – segregation factor, δ - grain boundary width and Db – diffusion coefficient in grain boundary) was also determined and it was found that it obeys the Arrhenius law P = 7.2 × 10-15 × exp (-46 kJ mol-1/RT) m3 s-1.

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Defect and Diffusion Forum (Volume 263)

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165-170

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https://doi.org/10.4028/www.scientific.net/DDF.263.165

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Online since:

March 2007

Authors:

Jiří Čermák, Ivo Stloukal

Keywords:

AZ91 Alloy, Magnesium, Mg-Al Alloys, Zinc Diffusion

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