利用N2 等离子法制备出纳米Al+AlN混合粉 ,然后在N2 气氛中烧结制备出块体AlNp/Al纳米复合材料 .XRD ,HR_TEM ,SEM ,DTA的研究结果表明 :样品组织结构主要由纳米级AlN颗粒分布在Al基体上和部分略有长大的AlN颗粒偏聚在Al基晶界上两大部分组成 ;样品密度在烧结后虽有所下降 ,但其显微硬度显著增大 .最高烧结温度下制备出的复合材料样品硬度值比一般铸态纯Al高 2 0多倍 .纳米AlN陶瓷颗粒在这种复合材料中起到增强相作用 . The AlNp / Al nanocomposites were prepared by N2 plasma sintering and then sintered in N2 atmosphere.The results of XRD, HR_TEM, SEM and DTA showed that the microstructures of the samples were mainly composed of nano-sized AlN Particles distributed on the Al matrix and some slightly grown AlN particles segregated on the Al-based grain boundaries on two major components; although the sample density decreased after sintering, but its microhardness significantly increased.The maximum sintering temperature The hardness of composite samples prepared under this condition is more than 20 times higher than that of pure as-cast pure Al nanocrystalline ceramic particles play an enhanced role in this composite material.