MWCNTs/AZ31 surface composites fabricated by friction stir processing
MWCNTs/AZ31 surface composites fabricated by friction stir processing
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DOI：
10.1016/j.msea.2006.01.016
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发表时间：
2006-03
期刊：
影响因子：
6.4
通讯作者：
Y. Morisada;H. Fujii;T. Nagaoka;M. Fukusumi
中科院分区：
文献类型：
--
作者：
Y. Morisada;H. Fujii;T. Nagaoka;M. Fukusumi
采用搅拌摩擦法将多壁碳纳米管（MWCNTs）分散到镁合金（AZ 31）中。多壁碳纳米管的分布根据FSP工具的行进速度而改变。MWCNTs/AZ 31表面复合材料的晶粒尺寸小于未添加MWCNTs的AZ 31表面复合材料的晶粒尺寸。多壁碳纳米管的加入似乎是有效的制备由细基体晶粒组成的复合材料。该复合材料的最大显微硬度为1078 Hv，几乎是AZ 31基体（41 Hv）的两倍。这被认为是晶粒细化的AZ 31基体和增强的MWCNTs提高了表面复合材料的显微硬度。
Multi-walled carbon nanotubes (MWCNTs) were successfully dispersed into a magnesium alloy (AZ31) using friction stir processing (FSP). Distribution of the MWCNTs was changed on the basis of the travel speed of the FSP tool. The grain size of the MWCNTs/AZ31 surface composites was smaller than that of the FSPed AZ31 without the MWCNTs. The addition of the MWCNTs appears effective for fabricating the composites consisting of fine matrix grains. The maximum microhardness of these composites was ∼78Hv, which is almost double that of the AZ31 substrate (41Hv). It is considered that both the grain refinement of the AZ31 matrix and the reinforcement by the MWCNTs increased the microhardness of the surface composites.