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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Al2O3/Al纳米复合材料的强化机制
, PP. 320-324
Keywords: Al2O3/Al,纳米复合材料,拉伸性能
Abstract:
将含氢等离子蒸发法制备的Al2O3/Al纳米复合粉体冷压成直径25nm、厚度为2nm的块材，并通过620℃,40min热烧结和变形量为55%的冷轧形处理使样品的相对密度达到99%。对高致密Al2O3/Al纳米复合材料的拉伸实验表明其屈服强度σ0.2和断裂强度σb分别为粗晶Al的12-16倍和5-6倍,延伸率δ比同质冷轧粗晶Al约高28%.表征了Al2O3/Al纳米复合材料的结构和热稳定性,研究了晶粒细化效应、非晶Al2O3/Al弥散增强和冷变形加工硬化等对材料强度的影响。探讨了Al2O3/Al纳米复合材料的强化机制。
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