This paper deals with the role of minor addition of Cr on the atomic rearrangement and crystallization evolution in a Zr-based bulk metallic glass. For this purpose, Cr elements with 1–4% atomic percentage were added into the alloying composition. The X-ray diffraction results indicated that the trace element led to the increase in disordered structures in the glassy alloy and the decline in population of short and medium scale orders. This event was due to the intensification of structural heterogeneity which was manifested in the change of enthalpy relaxation. The differential scanning calorimetry analysis also showed that all ZrCoAlCr BMG samples included two distinct crystallization peaks during the heating process. However, the increase in Cr content led to the intensification of low temperature peak. This result was consistent with viscosity analysis, in which the viscosity decrement was intensified at the range of low temperature crystallization peak with the rise in Cr content. Moreover, it was found that although the plasticity improved in samples with Cr-content, the strength showed a slight decrease.

本文探讨了微量添加Cr在Zr基块状金属玻璃中对原子重排和结晶演化的作用。为此，将1-4％原子百分比的Cr元素添加到合金成分中。X射线衍射结果表明，痕量元素导致玻璃态合金中无序结构的增加，而中短尺度的数量减少。此事件是由于结构异质性的增强所致，表现为焓弛豫的变化。差示扫描量热分析还显示，所有ZrCoAlCr BMG样品在加热过程中均包含两个不同的结晶峰。但是，Cr含量的增加导致低温峰的增强。该结果与粘度分析一致，其中随着Cr含量的增加，粘度降低在低温结晶峰的范围内增强。此外，发现尽管Cr含量样品的可塑性提高了，但强度却略有下降。