Abstract The crystallization kinetics of TiZrHfBe(Cu, Ni) high entropy bulk metallic glasses have been studied using differential scanning calorimetry. Each alloy possesses a complex multi-step crystallization process due to the high entropy effect. It was found that substitution of Cu by Ni significantly improves the glass-forming ability but deteriorates the thermal stability of the TiZrHfBeCu alloy. The activation energies of glass transition and crystallization together with the fragility parameter for the Ni-free and Ni-containing alloys have been calculated. According to the calculated values of local Avrami exponent, the first crystallization event for the studied TiZrHfBe(Cu, Ni) alloys is dominated by a direct growth of crystal nuclei. Substitution of Cu by Ni favors the precipitation of Ni-containing intermetallic compounds and inhibits the formation of CuHf2 phase, resulting in the improvement of glass-forming ability.

中文翻译：

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Ni取代Cu对TiZrHfBeCu高熵块状金属玻璃结晶动力学的影响

摘要 使用差示扫描量热法研究了 TiZrHfBe(Cu, Ni) 高熵块状金属玻璃的结晶动力学。由于高熵效应，每种合金都具有复杂的多步结晶过程。结果表明，Ni 取代 Cu 显着提高了玻璃形成能力，但降低了 TiZrHfBeCu 合金的热稳定性。计算了无镍和含镍合金的玻璃化转变和结晶活化能以及脆性参数。根据局部 Avrami 指数的计算值，所研究的 TiZrHfBe(Cu, Ni) 合金的第一次结晶事件以晶核的直接生长为主。