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Article
“Wetting” Phase Transitions by the Second Solid Phase for Linear Defects (Grain Boundary Triple Junctions)
In this work, the wetting phase transition of grain boundaries (GBs) and their triple junctions (GB TJs) by the second solid phase in the magnesium-based alloy EZ33A is studied. The condition for complete wett...
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Article
Comparison of Spectra of Grain Boundaries Spontaneously Formed in Cu-Ag and Cu-In Systems
Spectra of grain boundaries existing in the polycrystalline copper-silver system (positive enthalpy of mixing) have been studied in comparison with those of the copper-indium system (negative enthalpy of mixin...
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Article
Thermodynamic and Kinetic Properties of Grain-Boundary Ridges on Tilt \([11\bar 20]\) Grain Boundaries in Zinc
Thermodynamic and kinetic properties characteristic of grain-boundary ridges on tilt \([11\bar 20]\) ...
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Article
Thermal stability of the microstructure of silver films
The thermal stability of freely suspended silver films 100 nm thick is studied during isothermal annealing at temperatures of 350–600°C for different times. At temperatures of 350–450°C, only grain growth is o...
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Article
Observation of Pseudopartial Grain Boundary Wetting in the NdFeB-Based Alloy
The NdFeB-based alloys were invented in 1980s and remain the best-known hard magnetic alloys. In order to reach the optimum magnetic properties, the grains of hard magnetic Nd2Fe14B phase have to be isolated from...
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Article
Grain boundary wetting phase transitions in peritectic copper—cobalt alloys
The transition from incomplete to complete grain boundary wetting in copper alloys with 2.2 and 4.9 wt % Co has been studied. These alloys with peritectic phase diagrams differ from previously studied systems ...
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Article
Pseudopartial wetting of grain boundaries in severely deformed Al-Zn alloys
After severe plastic deformation by the high-pressure torsion, Al-Zn alloys have three various classes of Al/Al grain boundaries (GBs) wetted with a second zinc-rich phase. Completely wetted Al/Al GBs are coat...
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Article
Reversible “Wetting” of grain boundaries by the second solid phase in the Cu-In system
The reversible wetting of grain boundaries by the second solid phase in the copper-indium system has been observed. With an increase in the temperature, the contact angle θ between the (Cu)/(Cu) grain boundary...
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Article
Contribution of tilt boundaries to the total energy spectrum of grain boundaries in polycrystals
By measuring temperatures T w for the transition from the incomplete to complete wetting of grain boundaries in poly- and bicrystals, the width of the spectrum of tilt grain boundaries and their c...
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Article
Apparently complete grain boundary wetting in Cu–In alloys
The transition from incomplete to complete grain boundary (GB) wetting has been studied in the (Cu) + L region of the Cu–In phase diagram in the broad interval of In concentrations from 4 to 22 wt% In. The num...
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Article
Wetting of grain boundaries in hard-magnetic Nd-Fe-B alloys
Samples of Nd-Fe-B alloys, which have been the main hard-magnetic materials with the highest magnetic energy since the end of the 1980s, are investigated. Magnets based on them are obtained by liquid-phase sin...
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Article
Solid-phase wetting at grain boundaries in the Zr-Nb system
The microstructure of Zr-Nb polycrystalline alloys with niobium concentrations of 1, 2.5, 4, and 8 wt % is investigated in the temperature interval of 620–840°C. It is revealed that the second solid phase β-Nb...
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Article
Contact angles by the solid-phase grain boundary wetting (coverage) in the Co–Cu system
The microstructure of binary Co–13.6 wt% Cu and Cu–4.9 wt% Co alloys after long anneals (930–2,100 h) was studied between 880 and 1,085 °C. The contact angles between (Co) particles and (Cu)/(Cu) grain boundar...
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Article
Open AccessWetting of grain boundaries in Al by the solid Al3Mg2 phase
The microstructure of binary Al100−x –Mg x (x = 10, 15, 18 and 25 wt%) alloys after long anneals (600–4000 h) was studied between 210 and 440 °C. The tra...
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Article
Grain boundary wetting in the Al-Mg system and synthesis of magnesium diboride in contact with melt
The interaction between a Mg-containing melt and B under conditions of partial and complete wetting of Al/Al grain boundaries by Al-Mg melt has been investigated. The study was performed on Al polycrystals wit...
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Article
First observation of a wetting phase transition in low-angle grain boundaries
The wetting phase transition at low-angle intercrystallite grain boundaries has been experimentally observed. In contrast to the high-angle grain boundaries with the misorientation angels θ > 15°, the low-angl...
