We report a success in synthesizing high entropy silicides (HES) compounds and manufacturing well-densified HES ceramics through spark plasma sintering. For a designed chemical formula as (Ti_0.2Zr_0.2Nb_0.2Mo_0.2W_0.2)Si₂, the as-synthesized HES showed a formula as (Ti_0.22Zr_0.06Nb_0.29Mo_0.22W_0.21)Si₂ with zirconium partially oxidized into zirconia. Doping with aluminum resulted in a HES with the same composition, promoted formation of ZrSi₂ and Al₂O₃. XRD analysis of as-synthesized HES is well supported by the calculated diffraction data based on a 2 × 3 × 1 supercell with HCP crystal structure and experimental chemical composition. The cations in this HES crystal structure can occupy their positions randomly with little change of its lattice parameters and formation enthalpy.

我们报道了通过火花等离子体烧结成功合成高熵硅化物（HES）化合物和制造致密化HES陶瓷的成功案例。对于设计的化学式为（Ti _0.2 Zr _0.2 Nb _0.2 Mo _0.2 W _0.2）Si ₂，刚合成的HES的化学式为（Ti _0.22 Zr _0.06 Nb _0.29 Mo _0.22 W _0.21）Si _2，其中锆部分氧化为氧化锆。铝掺杂导致具有相同组成的HES，促进ZrSi ₂和Al ₂ O _3的形成。基于具有HCP晶体结构和实验化学成分的2×3×1超级电池的衍射数据计算，可以很好地支持合成的HES的XRD分析。该HES晶体结构中的阳离子可以随机占据其位置，其晶格参数和形成焓几乎不变。