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首页> 外文期刊>Journal of Materials Engineering and Performance >Structural Evolution in Mechanically Alloyed and Spark Plasma Sintered Iron–0.15?wt.% MWCNT Composite
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Structural Evolution in Mechanically Alloyed and Spark Plasma Sintered Iron–0.15?wt.% MWCNT Composite

机译：机械合金化和火花等离子体烧结铁-0.15≤％的结构演变。％MWCNT复合材料

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摘要

High-energy ball milling (HEBM) of mixtures of iron powder and multi-walled carbon nanotube (MWCNT) has been performed in an attempt to synthesize nano-grained steel. Even after exposure to a harsh HEBM conditions, the MWCNTs are seen to have retained their structural identity, and therefore, an MWCNT-reinforced steel matrix composite could be finally produced. Moreover, the study has revealed that the minor addition of copper leads to a significant reduction in grain size of ferrite in the so-produced steel matrix–MWCNT composite. It is also noticed that the fine grain structure of ferrite remains intact even after consolidation of the powder composite by spark plasma sintering, followed by hot forging. The micro-hardness values obtained for the composites (with/without copper) are observed as comparable with the submicron-grained steels, so far reported in the literature.
机译：已经进行了用于合成纳米粒钢的铁粉和多壁碳纳米管（MWCNT）的混合物的高能球铣削（Hebm）。 即使在暴露于苛刻的Hebm条件之后，也可以看到MWCNTS保留其结构标识，因此，最终可以产生MWCNT加强钢基质复合材料。 此外，该研究表明，在所生产的钢基质-MWCNT复合材料中，铜的次粒加入铜导致铁氧体的晶粒尺寸的显着降低。 还注意到，即使通过火花等离子体烧结将粉末复合材料固结后，铁氧体的细粒结构也保持完整，然后进行热锻。 到目前为止，观察到复合材料（带/不含铜）的微硬度值与亚微米粒胶质钢相比。

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