中文摘要：

Co48x Fe x Cr15Mo14C15B6Er2 (x = 2.5 和 5 ) 体积有直到在直径的 15 公里的批评尺寸(d c ) 的金属性的眼镜(BMG ) 被铜模子扔综合。Co43Fe5Cr15Mo14C15B6Er2 BMG 有一个宽 supercooled 液体区域(84 K ) 并且超离频折断超过 5000 MPa 的力量，它是为有超过 1 厘米的 d c 的报导金属性的眼镜的最高的价值。而且，泊松比率，年轻模量，砍这合金的模量和体积模量被评估是 0.31， 217 GPa， 82 GPa 和 214 GPa 分别地。Co48x Fe x Cr15Mo14C15B6Er2 的理想的 configurational 熵(x = 0 和 5 ) 被计算了。在 Fe 免费的 Co-Cr-Mo-C-B-Er 合金的类似的元素 Fe 的介绍将对增加理想的 configurational 熵并且压抑批评冷却率完成更大的形成眼镜的能力有益。优异形成眼镜的能力的联合并且超离频破裂力量使现在的 Co48x Fe x 成为 Cr15Mo14C15B6Er2 (x = 2.5 和 5 ) 推进了结构的材料的 BMG 有希望的候选人。

英文摘要：

Co48-xFexCr15Mo14C15B6Er2 （x = 2.5 and 5） bulk metallic glasses （BMGs） with critical size （dc） up to 15 mm in diameter were synthesized by copper mold casting. Co43Fe5Cr15Mo14C15B6Er2 BMG has a wide supercooled liquid region （84 K） and ultrahigh fracture strength exceeding 5000 MPa,which is the highest value for reported metallic glasses with dc exceeding 1 cm. Furthermore,the Poisson ratio,Young modulus,shear modulus and bulk modulus of this alloy were evaluated to be 0.31,217 GPa,82 GPa and 214 GPa,respectively. The ideal configurational entropy of Co48-xFexCr15Mo14C15B6Er2 （x = 0 and 5） has been calculated. The introduction of the similar element Fe in the Fe-free Co-Cr-Mo-C-B-Er alloy will be beneficial to increasing the ideal config-urational entropy and depressing the critical cooling rate to achieve greater glass-forming ability. The combination of superior glass-forming ability and ultrahigh fracture strength makes the present Co48-xFexCr15Mo14C15B6Er2 （x = 2.5 and 5） BMGs promising candidates as advanced structural materials.