论文标题
一种改进的方法来制造CNT增强镁AZ91复合材料，强度和延展性提高
An improved approach to manufacture CNT reinforced magnesium AZ91 composites with increased strength and ductility
论文作者
论文摘要
多壁碳纳米管（MWCNT）使用POLE（4-----硫酸钠硫酸钠）（PSS）和聚（dyallyl二甲基铵氯化物）（PDDA）（PDDA）的“逐层”方法（pDA），用PT纳米颗粒（PT纳米颗粒）装饰。样品的透射电子显微镜（TEM）图像和能量色散X射线（EDX）分析证实了CNT表面上的PT沉积。当MWCNT用Pt纳米颗粒涂有MWCNT时，MWCNT的分散性和分散稳定性会增强。然后通过熔融搅拌过程产生用MWCNT增强的Mg AZ91复合材料。复合材料的压缩测试表明，与纯AZ91和原始MWCNT/AZ91相比，AZ91中添加0.05 \％WT PT涂层的MWCNT可改善复合材料的机械性能。使用扫描电子显微镜（SEM）对复合材料进行断裂表面分析显示，在PT涂层的MWCNT/AZ91复合材料的情况下，拔出了MWCNT。我们将这一发现归因于PT涂层MWCNT在MG中的均匀分散体，这是由于MG熔体中PT涂覆的MWCNT的润湿性提高。分子动力学（MD）模拟PT涂层MWCNT和MG之间的相互作用支持了这种解释。
Multiwalled carbon nanotubes (MWCNTs) are decorated with Pt nanoparticles by a "layer-by-layer" approach using poly (sodium 4-styrene sulfonate) (PSS) and poly (diallyl dimethylammonium chloride) (PDDA). Transmission electron microscopy (TEM) images and Energy Dispersive X-Ray (EDX) analysis of the samples confirm Pt deposition on surfaces of CNTs. Dispersibility and dispersion stability of MWCNTs in the solvents are enhanced when MWCNTs are coated with Pt nanoparticles. Mg AZ91 composites reinforced with MWCNTs are then produced by a melt stirring process. Compression tests of the composites show that adding 0.05\% wt Pt-coated MWCNTs in AZ91 improves the composite's mechanical properties compared to the pure AZ91 and pristine MWCNT/AZ91. Fracture surface analysis of the composite using a scanning electron microscope (SEM) shows individuals pulled out MWCNTs in the case of the Pt-coated MWCNT/AZ91 composites. We attribute this finding to the uniform dispersion of Pt-coated MWCNTs in Mg due to the improved wettability of Pt-coated MWCNTs in Mg melts. Molecular dynamics (MD) simulations of the interaction between Pt-coated MWCNTs and Mg support this interpretation.
