陈玉华, 刘东亚, 谢吉林, 余亮, 柯黎明. 搅拌摩擦加工法制备碳纳米管增强镁基复合材料的组织与性能[J]. 南昌航空大学学报(自然科学版), 2015, 29(1): 49-54. DOI: 10.3969/j.issn.1001-4926.2015.01.008
引用本文: 陈玉华, 刘东亚, 谢吉林, 余亮, 柯黎明. 搅拌摩擦加工法制备碳纳米管增强镁基复合材料的组织与性能[J]. 南昌航空大学学报(自然科学版), 2015, 29(1): 49-54. DOI: 10.3969/j.issn.1001-4926.2015.01.008
CHEN Yu-hua, LIU Dong-ya, XIE Ji-lin, YU Liang, KE Li-ming. Microstructure and Microstructure of Carbon Nanotube Reinforced Magnesium Matrix Composites Fabricated by Friction Stir Processing[J]. Journal of nanchang hangkong university(Natural science edition), 2015, 29(1): 49-54. DOI: 10.3969/j.issn.1001-4926.2015.01.008
Citation: CHEN Yu-hua, LIU Dong-ya, XIE Ji-lin, YU Liang, KE Li-ming. Microstructure and Microstructure of Carbon Nanotube Reinforced Magnesium Matrix Composites Fabricated by Friction Stir Processing[J]. Journal of nanchang hangkong university(Natural science edition), 2015, 29(1): 49-54. DOI: 10.3969/j.issn.1001-4926.2015.01.008

搅拌摩擦加工法制备碳纳米管增强镁基复合材料的组织与性能

Microstructure and Microstructure of Carbon Nanotube Reinforced Magnesium Matrix Composites Fabricated by Friction Stir Processing

  • 摘要: 以碳纳米管为增强相,采用搅拌摩擦加工法制备了镁基复合材料。利用光学显微镜、扫描电子显微镜、微机控制拉伸仪等分析测试手段,研究了复合材料的显微组织及其断口形貌,分析了碳纳米管含量对其力学性能的影响。结果表明:增强相的加入使复合区的晶粒细化;复合区显微硬度随增强相添加量的增加呈上升趋势,而其抗拉强度呈先上升后下降趋势;断裂方式随着碳纳米管的含量增加由混合型过渡为脆性断裂,碳纳米管的体积分数大于7.1%时,碳纳米管的团聚现象较为突出,团聚区域断面光滑平整,裂纹源由此产生并向周围扩展,导致强度降低。

     

    Abstract: Friction stir processing (FSP) was employed to fabricate CNTs reinforced magnesium matrix composites material. Microstructure, fracture morphology and effects of CNTs content on mechanical properties were analyzed by optical microscopy, scanning electron microscopy(SEM)and other test methods. The results show that reinforced phase refine the grains in the composite region; the microhardness of the composite region was increased as the CNTs content increasing, while the tensile strength of the composite material was increase first then decrease as the content increasing. Fracture mode of the composite was changed from mixed fracture to brittle fracture; reunion of the CNTs is especially notable as the content over 7.1%. The fracture interface of the reunion region is smooth and that is the very place where crack begin that reducing the tensile strength.

     

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