High-strength and high-modulus Mg-10Gd-3Y-1Zn-0.4Zr (GWZ1031K, wt.%) alloy matrix composite reinforced with aluminum borate whiskers (Al₁₈B₄O₃₃w) was fabricated by squeeze casting. The microstructure, interfacial characteristics, mechanical properties and fracture behavior of the composite were investigated. The results indicate that the grains of Mg matrix were significantly refined from 29±2 μm to 2 ± 0.5 μm by the randomly distributed whiskers in the composite. For the first time, two adjacent and distinct interfacial reaction layers were found between the whisker and matrix, which resulted from the interfacial reaction and element diffusion. Compared with the matrix alloy and other Al₁₈B₄O₃₃w reinforced Mg matrix composites, the tensile strengths at room and high temperatures, Vickers hardness and Young's modulus of the composite were significantly improved. The yield strength (YS), ultimate tensile strength (UTS) and Young's modulus of the material at room temperature reached 364 ± 13 MPa, 380 ± 16 MPa and 77.8 ± 2.1 GPa respectively, realizing the integration of high strength and high modulus. The fracture analysis indicated a mixed fracture mode of macro brittle fracture and micro ductile fracture of the composite.

通过挤压铸造制备了硼酸铝晶须（Al ₁₈ B ₄ O ₃₃ w）增强的高强度高模量Mg-10Gd-3Y-1Zn-0.4Zr（GWZ1031K，wt。％）合金基复合材料。研究了复合材料的微观结构，界面特性，力学性能和断裂行为。结果表明，通过随机分布在复合材料中的晶须，Mg基体的晶粒从29±2μm细化到2±0.5μm。晶须与基体之间首次发现了两个相邻且不同的界面反应层，这是由于界面反应和元素扩散所致。与基体合金及其他Al ₁₈ B ₄ O _33相比使用增强的镁基复合材料，复合材料在室温和高温下的拉伸强度，维氏硬度和杨氏模量得到了显着提高。室温下材料的屈服强度（YS），极限抗拉强度（UTS）和杨氏模量分别达到364±13 MPa，380±16 MPa和77.8±2.1 GPa，实现了高强度和高模量的整合。断裂分析表明，复合材料存在宏观脆性断裂和微观韧性断裂的混合断裂模式。