In IRG-1, Luo, Xin, Rupert, and their students have discovered Ni activated sintering of MoNbTaW guided by a computed grain boundary “phase” (complexion) diagram.
This collaborative study made the first observation of solid-state activated sintering in a high-entropy alloy.
Grain boundary (GB) wetting was observed above the solidus line, implying subsolidus GB prewetting to promote sintering.
A GB diagram was computed to forecast high-temperature GB disordering and explain activated sintering.
Scanning transmission electron microscopy revealed only weak Ni segregation in furnace-cooled specimens, suggesting GB drying during cooling that may alleviate GB embrittlement.
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Center for Complex and Active Materials
The primary mission of he MRSEC at UCI is to establish foundational knowledge in materials science and engineering of new classes of materials offering unique and broad functionality via an interplay among design, simulation, synthesis, and advanced characterization.