The thought of designing Al–based composites with attractive comprehensive properties, by using various particles as reinforcements simultaneously, has been put forward and verified in this paper. By in–situ synthesizing Al₂O₃ (<1 μm), ZrB₂ (<300 nm) and AlN (<100 nm) particles, a novel (Al₂O₃+ZrB₂+AlN)/Al composite has been prepared. It was found that the ultimate tensile strength of the composite is as high as 540 MPa at 25 °C and 200 MPa at 350 °C, while the elasticity modulus of the composite is 101 GPa. Besides, the composite also performs attractive thermal stability and the coefficient of thermal expansion is 15.8×10^–6 K^–1 at 500 °C. It is regarded that the synergistic effect of the multi–scale Al₂O₃, ZrB₂ and AlN particles are responsible for the improved performance. This paper may be referred for designing multiphase reinforced composites to achieve various properties.

本文提出并验证了通过同时使用各种颗粒作为增强材料来设计具有有吸引力的综合性能的铝基复合材料的想法。通过原位合成Al ₂ O ₃（<1μm），ZrB ₂（<300 nm）和AlN（<100 nm）颗粒，制备了新型（Al ₂ O ₃ + ZrB ₂ + AlN）/ Al复合材料。发现该复合材料的极限拉伸强度在25℃下高达540MPa，在350℃下高达200MPa，而复合材料的弹性模量为101GPa。此外，该复合材料还具有出色的热稳定性，热膨胀系数为15.8×10 ^–6  K ^–1 在500°C下。可以认为，多尺度Al ₂ O ₃，ZrB ₂和AlN颗粒的协同作用是改善性能的原因。本文可用于设计多相增强复合材料以实现各种性能。