倪圆苹, 邢丽, 徐卫平, 仇一卿, 柯黎明. MWCNTs/AZ80复合材料在高温时的组织特征[J]. 南昌航空大学学报(自然科学版), 2016, 30(1): 47-51,58. DOI: 10.3969/j.issn.1001-4926.2016.01.009
引用本文: 倪圆苹, 邢丽, 徐卫平, 仇一卿, 柯黎明. MWCNTs/AZ80复合材料在高温时的组织特征[J]. 南昌航空大学学报(自然科学版), 2016, 30(1): 47-51,58. DOI: 10.3969/j.issn.1001-4926.2016.01.009
NI Yuan-ping, XING Li, XU Wei-ping, CHOU Yi-qing, KE Li-ming. Microstructure Characteristics of MWCNTs/AZ80 Composites at High Temperatures[J]. Journal of nanchang hangkong university(Natural science edition), 2016, 30(1): 47-51,58. DOI: 10.3969/j.issn.1001-4926.2016.01.009
Citation: NI Yuan-ping, XING Li, XU Wei-ping, CHOU Yi-qing, KE Li-ming. Microstructure Characteristics of MWCNTs/AZ80 Composites at High Temperatures[J]. Journal of nanchang hangkong university(Natural science edition), 2016, 30(1): 47-51,58. DOI: 10.3969/j.issn.1001-4926.2016.01.009

MWCNTs/AZ80复合材料在高温时的组织特征

Microstructure Characteristics of MWCNTs/AZ80 Composites at High Temperatures

  • 摘要: 用搅拌摩擦加工技术(FSP)制备出体积分数为3.1%的MWCNTs/AZ80复合材料,采用光学显微镜和XRD技术观察经不同热暴露温度3 h后复合材料的显微组织和物相。结果表明:FSP制备的MWCNTs/AZ80复合材料会发生动态再结晶,组织为细小的等轴晶。经FSP加工后,T6态AZ80镁合金中的β-Mg17Al12析出相会减少;加入MWCNTs后,MWCNTs/AZ80复合材料中的β-Mg17Al12相更少。随着热暴露温度的升高,复合材料的组织越来越粗大,复合材料中的β-Mg17Al12析出相含量增加;但热暴露温度超过150 ℃后,复合材料中的析出相则减少。

     

    Abstract: The volume fraction of 3.1% MWCNTs/AZ80 composites were prepared using the friction stir processing technique. The microstructure and phase of composites at different thermal exposure temperatures for 3 hours were analyzed by optical microscopy and XRD tests. The results show that the MWCNTs/AZ80 composites prepared by FSP are fine grains, and the microstructures are equal axial grains after dynamic recrystallization. After FSP processing, the content of β-Mg17Al12 precipitates in the T6 state of AZ80 magnesium alloy is reduced. With the addition of MWCNTs, the grains of MWCNTs/AZ80 composites are finer and the content of β-Mg17Al12 is smaller. With the increasing of thermal exposure temperature, the microstructure of the composite becomes coarse, and the content of β-Mg17Al12 precipitates in the composite is increased. However, the content of β-Mg17Al12 precipitates of composites is decreased when the thermal exposure temperature is higher than 150 ℃.

     

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