以纯铝粉(99.7%)为原料,采用不同的球磨参数(球料比、球磨时间),利用高能球磨法在室温下制备了具有纳米晶粒的纯Al体材料.通过X射线衍射(XRD)及显微硬度等手段,对不同球磨工艺参数下制备的纯Al体材料的晶粒尺寸及力学性能进行了测试和分析,并对样品的晶粒尺寸与硬度之间的关系进行了深入的探讨.研究发现,所制备的纯Al纳米晶体材料的平均晶粒尺寸在47～66nm范围内;随着球磨时间的延长,样品的显微硬度呈现出先升高后降低再升高的趋势,并在球磨时间为5h时,球磨样品的硬度达到最高值;屈服强度与晶粒尺寸之间符合正的Hall-Petch关系.
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