A La₇₄Al₁₄Cu₆Ni₆ bulk metallic glass matrix composite (BMGMC) with in situ spherical α-La phases and micron-sized AlLa₃ intermetallic compounds is prepared by adjusting the processing parameters and presents a good combination of high strength and plasticity. Compared with conventional single α-La dendrite-reinforced La₇₄Al₁₄Cu₆Ni₆ BMGMCs that have a low fracture strength and plasticity, the obtained composite shows a significant plastic strain of 17% and a high fracture strength of 566 MPa. The results show that the formation of ductile bulky spherical α-La phases and hard AlLa₃ intermetallic compounds can effectively hinder the rapid propagation of single shear band, and the synergistic effect of the two phases accounts for the significant increase in plasticity. Furthermore, in situ formed AlLa₃ intermetallic compounds with a hardness of 238 HV, which has strong interaction with multiple shear bands, dramatically improve the fracture strength of the composite.

通过调整工艺参数制备了具有原位球形α-La相和微米级AlLa ₃金属间化合物的La ₇₄ Al ₁₄ Cu ₆ Ni ₆块状金属玻璃基复合材料（BMGMC），具有高强度和塑性的良好结合. 与具有低断裂强度和塑性的常规单α-La枝晶增强La ₇₄ Al ₁₄ Cu ₆ Ni ₆ BMGMCs相比，所获得的复合材料显示出17%的显着塑性应变和566 MPa的高断裂强度。结果表明，形成了韧性大的球形α-La相和硬质AlLa ₃金属间化合物能有效阻碍单剪切带的快速传播，两相的协同作用使塑性显着增加。此外，原位形成的AlLa ₃金属间化合物硬度为238 HV，与多个剪切带相互作用强，显着提高了复合材料的断裂强度。