Abstract The increased excess entropy in face-centered-cubic high entropy alloys is confirmed by quantitatively measuring heat capacities of pure Ni together with equiatomic NiCo, NiCoCr, and NiCoFeCr alloys with increasing configurational entropy. Surprisingly, the incredible excess entropy in the NiCoFeCr alloy can be even up to 0.9R, much larger than that in traditional alloys. The temperature-dependent measurement of the excess entropy indicates the major contribution of lattice vibrations. The excess magnetic entropy dominates in the temperature of 300 to 1000 K. The abnormal excess entropy reveals extraordinary lattice dynamic effects in high entropy alloys, which is a new feature in these alloys.

中文翻译：

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高熵合金中令人难以置信的过剩熵

摘要 通过定量测量纯 Ni 以及等原子 NiCo、NiCoCr 和 NiCoFeCr 合金的热容，可以证实面心立方高熵合金中过剩熵的增加。令人惊讶的是，NiCoFeCr 合金令人难以置信的过剩熵甚至可以达到 0.9R，远大于传统合金。过量熵的温度相关测量表明晶格振动的主要贡献。过剩的磁熵在 300 到 1000 K 的温度下占主导地位。异常的过剩熵揭示了高熵合金中非凡的晶格动力学效应，这是这些合金的一个新特征。