采用活性氢等离子蒸发法制备出纳米Al粉体,然后将粉体冷压成块体经适当热处理的纳米Al块体试样的屈服强度σ0.2是普通粗晶Al的12～16倍,断裂强度σb是粗晶Al的5～6倍,断裂延伸率达4%,为典型的韧窝塑性断口.讨论了纳米晶Al的断裂机制
The nano-Al powder synthesized by the active H2 plasma evaporation was compacted under 1.42GPa pressure at room temperature and the disks with 25mm diameter and 2mm thickness were obtained. The cold-compacted disks were heat-treated at temperature range f
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