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China scientists turn to Terminator liquid metal in alloy breakthrough

‘Unbelievable’ breakthrough just adds gallium and it could lead to unprecedented new alloys, researchers said.

A (CrFeNi)83(AlTi)17 high-entropy alloy matrix solid-lubricating compo by Yushan Geng, Jun Cheng et al

High-entropy alloy matrix solid-lubricating composites (HSLCs) are promising anti-wear and friction-reduced materials to meet the demands of complicated engineering applications. Here we present a strategy to develop HSLCs by using the coupled high-entropy phases of (BCC + FCC + L21) with near-equal volume fraction as the matrix material, instead of using the usual single phase-dominated high-entropy phases, which can preserve the intrinsic strength and deformability of the matrix while activating adaptive wear protection during sliding. This enables a low coefficient of frictions of 0.23–0.31 and wear rates within the order of 10–6–10–5 mm3 N m–1 for the (CrFeNi)83(AlTi)17-Ag-BaF2/CaF2 HSLC between room-temperature and 800 °C, considerably outperforming the reported HSLCs and conventional alloy matrix solid-lubricating composites. At low and moderate temperatures, the synergistic Ag-BaF2/CaF2 lubricating films eliminate the surface stress concentration upon wear, thus suppr

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