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-  2018 

纳米金属材料热稳定性及其表征方法研究进展 Advances in Thermal Stability and Characterization Methods of Nanostructured Metal Materials

Keywords: 纳米金属材料,晶界,晶粒生长,热稳定性

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Abstract:

高温条件下,纳米金属材料晶粒易于长大,导致其强度、硬度等力学性能的退化,这一问题限制了纳米金属材料的工艺发展及应用.纳米金属合金的热稳定性研究致力于通过动力学或热力学手段抑制纳米晶粒高温下的生长,提高纳米金属材料的热稳定性.本文简要地介绍了纳米金属材料研究中的热力学与动力学机理发展,重点梳理了纳米金属材料热稳定性研究所涉表征方法,包括X射线衍射仪(XRD)、电子显微镜系统(SEM和TEM)、聚焦离子束成像系统(FIB)、热分析系统(TA)、原子探针系统(APT)等,系统地介绍了有限配比纳米合金(纳米铁合金、纳米铜合金、纳米铝合金等)和多元纳米合金(纳米合金钢、氧化物弥散增韧纳米合金等)的热稳定性理论和实验研究,并对当前纳米金属材料的热稳定性研究进行了总结

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