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以细雾化铝粉和TiB2颗粒为原料,通过粉末冶金和热轧制制备微米TiB2和纳米Al2O3颗粒增强铝基复合材料.室温时,由于TiB2和Al2O3 的综合强化作用,Al2O3/TiB2/Al复合材料的屈服强度和抗拉强度分别为258.7 MPa 和279.3 MPa,测试温度升至350℃时,TiB2 颗粒的增强效果显著减弱,原位纳米Al2O3 颗粒与位错的交互作用使得复合材料的屈服强度和抗拉强度达到98.2 MPa和122.5 MPa.经350℃退火1000h 后,由于纳米Al2O3对晶界的钉扎作用抑制晶粒长大,强度和硬度未发生显著的降低.“,”Aluminum matrix composites with micro-TiB2 and nano-Al2O3 particles were successfully fabricated by combining powder metallurgy and hot rolling using raw materials of fine atomized aluminum powders and TiB2 particles.Results show that the Al2O3/TiB2/Al composites exhibit a yield strength of 258.7 MPa and an ultimate tensile strength of 279.3 MPa at 25℃due to the comprehensive strengthening effect of TiB2 and Al2O3 particles.The strengthening effect of TiB2 particles significantly weakens with rising the temperature to 350℃,and the Orowan strengthening mechanism between nano-Al2O3 and dislocation makes the yield strength and tensile strength of the composite material reach 98.2 and 122.5 MPa,respectively.After annealing at 350℃for 1000 h,due to the pinning effect of nano-Al2O3 at grain boundaries,the grains growth is suppressed significantly,and the strength and hardness do not decrease significantly.