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利用无压浸渗法制备B4C/2024Al复合材料,并通过XRD、SEM和力学性能检测研究热处理对复合材料相组成以及材料性能的影响。结果表明,B4C/2024Al复合材料包含B4C、Al、Al3BC、AlB2和Al2Cu相。经过660、700、800和900°C热处理12、24或36 h后,相种类并没有变化,但是相含量发生显著改变。此外,经热处理,材料的硬度得到显著提高,抗弯强度有所下降。经800°C热处理36 h的材料硬度最高,经700°C热处理36 h的材料具有最优良的综合性能。
The B4C / 2024Al composites were prepared by pressureless infiltration method. The effects of heat treatment on the phase composition and the properties of the composites were investigated by XRD, SEM and mechanical properties testing. The results show that the B4C / 2024Al composites contain B4C, Al, Al3BC, AlB2 and Al2Cu phases. After heat treatment at 660, 700, 800 and 900 ° C for 12, 24 or 36 h, the phase type did not change but the phase content changed significantly. In addition, the heat treatment, the material hardness was significantly improved, bending strength decreased. The hardness of the material treated by heat treatment at 800 ° C for 36 h was the highest, and the material treated by heat treatment at 700 ° C for 36 h had the best overall performance.