Kurdi Abdulaziz, Basak Animesh Kumar, Radhika Nachimuthu, Degnah Ahmed
Advanced Materials Technology Institute, King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia.
King Salman Center for Disability Research, Riyadh 11614, Saudi Arabia.
Materials (Basel). 2025 Jul 4;18(13):3179. doi: 10.3390/ma18133179.
High-entropy alloy (HEA) particle-reinforced metal matrix composites (MMCs) are a new generation of MMCs with potential applications as orthopedic material in automotive, aerospace, and biomedical fields. In this study, AlCoCrFeNi HEA-reinforced Ti-6Al-4V metal matrix composites (MMCs) were prepared by microwave sintering. The microstructural aspects of the MMC were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), with an emphasis on the interdiffusion (ID) layer. The mechanical properties of the composites were studied by micro-pillar compression at the micro-length scale. The results show that the ID layer exists between the HEA particles and the matrix, is equiaxed in nature, and leads towards metallurgical bonding within the composite. The strength of this ID layer (1573 MPa of yield strength and 1867 MPa of compressive strength) and its Young's modulus (570 MPa) were about 1.5 times lower than that of the matrix. The HEA particles exhibit the highest strength (2157 MPa of yield strength and 3356 MPa of compressive strength) and Young's modulus (643 MPa), whereas the matrix falls in between 2372 MPa of yield strength and 2661 MPa of compressive strength, and a Young's modulus of 721 MPa.
高熵合金（HEA）颗粒增强金属基复合材料（MMC）是新一代的MMC，在汽车、航空航天和生物医学领域作为骨科材料具有潜在应用价值。在本研究中，通过微波烧结制备了AlCoCrFeNi HEA增强Ti-6Al-4V金属基复合材料（MMC）。通过扫描电子显微镜（SEM）和透射电子显微镜（TEM）研究了MMC的微观结构，重点关注互扩散（ID）层。在微长度尺度上通过微柱压缩研究了复合材料的力学性能。结果表明，ID层存在于HEA颗粒与基体之间，本质上是等轴的，并导致复合材料内部的冶金结合。该ID层的强度（屈服强度为1573 MPa，抗压强度为1867 MPa）及其杨氏模量（570 MPa）约为基体的1.5倍。HEA颗粒表现出最高的强度（屈服强度为2157 MPa，抗压强度为3356 MPa）和杨氏模量（643 MPa），而基体的屈服强度在2372 MPa至2661 MPa之间，杨氏模量为721 MPa。
