Inversed solid-phase grain boundary wetting in the Al–Zn system
Source abstract
Abstract
The microstructure of binary Al–10 at% Zn and Al–15 at% Zn alloys after long anneals (800–4000 h) was studied between 190 and 258 °C. The contact angles between (Zn) particles and (Al)/(Al) grain boundaries (GBs) were measured. They decrease with decreasing temperature. First (Al)/(Al) GBs completely wetted by the second solid phase (Zn) appear below T wsAl0% = 205 ± 5 °C. Above T wsAl0% = 205 ± 5 °C all (Al)/(Al) GBs are incompletely wetted by (Zn) solid phase. The extrapolation of the maximal contact angle θ to zero permits to obtain the T wsAl100% = 125 ± 10 °C. Below this line all (Al)/(Al) GBs has to be completely wetted by (Zn) solid phase.
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Research context
OpenAlex topics: Aluminum Alloy Microstructure Properties · Aluminum Alloys Composites Properties · Microstructure and mechanical properties
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