Abstract Bulk alloy compositions in Zr-Al-Co-(Nb) system were understood and designed using our clusters- and mixing entropy-related method. Glass formers in Zr-Al-Co system were regarded as a mixture of Zr-Al and Zr-Co binary clusters with specific ratio. Icosahedral atomic clusters Co-Co 3 Zr 9 , Co-Co 6 Zr 6 , Al-Al 4 Zr 8 and an Archimedean octahedral anti-prism cluster Al-Al 2 Zr 8 were obtained and used. The coefficients of clusters were designed by mixing entropy. Only four compositions were designed. Among those, alloy with highest GFA was achieved at the composition of Zr 53.6 Al 18.6 Co 27.8 which enjoyed the same glass forming ability (GFA) as the well-known Zr 56 Al 16 Co 28 under the same condition. A series of compositions minor alloyed by Nb were further designed and analyzed. The results show that the optimum addition content of Nb could further enhance the GFA. Through the perspective of clusters and mixing entropy, it was assayed qualitatively the origin of enhancing GFA by minor-alloying element, which might help build a foundation for quantitative analysis of minor alloying.

中文翻译：

---

在结合簇和混合熵的 Zr-Al-Co-(Nb) 系统中理解和设计良好的玻璃形成剂

摘要 使用我们的簇和混合熵相关方法了解和设计了 Zr-Al-Co-(Nb) 系统中的块状合金成分。Zr-Al-Co体系中的玻璃形成物被认为是Zr-Al和Zr-Co二元簇按特定比例的混合物。获得并使用二十面体原子簇Co-Co 3 Zr 9 、Co-Co 6 Zr 6 、Al-Al 4 Zr 8 和阿基米德八面体反棱镜簇Al-Al 2 Zr 8 。簇的系数是通过混合熵设计的。只设计了四种构图。其中，GFA最高的合金是在Zr 53.6 Al 18.6 Co 27.8 的成分下获得的，在相同条件下与众所周知的Zr 56 Al 16 Co 28 具有相同的玻璃形成能力（GFA）。进一步设计和分析了一系列 Nb 微量合金成分。结果表明，Nb 的最佳添加量可以进一步提高 GFA。通过团簇和混合熵的角度，定性分析了微量合金元素增强GFA的起源，为微量合金化的定量分析奠定了基础。