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首页> 外文期刊>Journal of Materials Engineering and Performance >Study of Carbon Nanotubes in Cu-Cr Metal Matrix Composites
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Study of Carbon Nanotubes in Cu-Cr Metal Matrix Composites

机译：Cu-Cr金属基复合材料中碳纳米管的研究

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摘要

A novel metal matrix composite (MMC), Cu-Cr-MWCNT (copper-chromium-multiwalled carbon nanotube), was manufactured using a powder metallurgy technique. Cu-Cr alloy is widely adopted for contacts in vacuum circuit breakers. MWCNT was incorporated in an effort to enhance electrical conductivity and decrease the usage of Cr as strategic metal. Optimized milling conditions and sintering profiles were utilized to minimize any significant damage to the MWCNTs but yet provide homogeneous distribution of all constituents. Raman spectroscopy, transmission electron microscopy (TEM), and scanning electron microscopy (SEM) were used to determine the crystal structure orientation, microstructure, and morphology, respectively, of the composite. Raman peak shift and intensity ratios assessed the stresses induced and the degree of disorder of MWCNTs in the composite. TEM indicated carbide and oxide formations in the composite. SEM images revealed the presence of MWCNTs within the metal matrix. The corrosion resistances of the composite with and without MWCNTs was determined by cyclic potentiodynamic polarization (ASTM F 2129-08) in phosphate buffer saline solution at 37℃.
机译：利用粉末冶金技术制备了一种新型的金属基复合材料（MMC）Cu-Cr-MWCNT（铜铬多壁碳纳米管）。 Cu-Cr合金被广泛用于真空断路器的触点中。并入了MWCNT，以增强导电性并减少Cr作为战略金属的使用。利用了优化的研磨条件和烧结曲线，以最大程度地减少对MWCNT的任何重大破坏，但仍提供所有成分的均匀分布。拉曼光谱法，透射电子显微镜（TEM）和扫描电子显微镜（SEM）分别用于确定复合材料的晶体结构取向，微观结构和形态。拉曼峰移动和强度比评估了复合物中MWCNTs的诱导应力和无序程度。 TEM显示出复合物中碳化物和氧化物的形成。 SEM图像显示在金属基质中存在MWCNT。含和不含MWCNTs的复合材料的耐腐蚀性是通过在37℃的磷酸盐缓冲盐水溶液中进行的循环电位动力极化（ASTM F 2129-08）来确定的。

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