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首页> 外文期刊>RSC Advances >MAX phase ternary carbide derived 2-D ceramic nanostructures [CDCN] as chemically interactive functional fillers for damage tolerant epoxy polymer nanocomposites
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MAX phase ternary carbide derived 2-D ceramic nanostructures [CDCN] as chemically interactive functional fillers for damage tolerant epoxy polymer nanocomposites

机译：MAX相三元碳化物衍生的2-D陶瓷纳米结构[CDCN]作为化学相互作用的功能性填料，用于耐损伤的环氧聚合物纳米复合材料

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摘要

A 2-dimensional ceramic nanostructure was successfully processed out of nanolamellar 312 MAX phase ternary carbide, titanium silicon carbide, Ti3SiC2 (TSC), via a simple shear-induced delamination technique. It has been explored as a functional nanofiller for obtaining chemically homogeneous, low-friction, self-lubricating epoxy nanocomposites. The structural characterization of the MAX phase Carbide Derived Ceramic Nanostructure (CDCN) was carried out using Dynamic Light Scattering (DLS), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) analysis. Subsequently, CDCN was mixed with Araldite CY 225 (DGEBA) at different percentages and thermally cured using Aradur HY 925 hardener at 130 degrees C to make epoxy-Ti3SiC2 nanocomposites. The effect of CDCN-nanofiller was studied on epoxy rheology, glass transition temperature (T-g), thermal stability, flexural and compressive strengths, microhardness, dry sliding wear and friction properties. It was found that, unlike other ceramic fillers, CDCN chemically interacts with epoxy and readily dispersed in a polymer matrix without any deleterious structural defects. It resulted in the formation of physicochemically homogeneous microstructures. Epoxy composites prepared with CDCN filler attained 50% more mechanical strength and hardness. Wear analysis trends indicate Ti3SiC2 nano reinforcement possibly formed a lubricating tribo-chemical film that decreases the wear rate and coefficient of friction. This work is significant in such a way that a novel nanofiller has been identified from MAX phase carbide family which offers a self-lubricating interface and produces mechanically reliable, damage tolerant epoxy composite for state-of-the-art engineering applications.
机译：通过简单的剪切诱导分层技术，成功地从纳米薄片312 MAX相三元碳化物，碳化硅钛，Ti3SiC2（TSC）中加工出了二维陶瓷纳米结构。它已被探索为一种功能性纳米填料，用于获得化学均质，低摩擦，自润滑的环氧纳米复合材料。使用动态光散射（DLS），扫描电子显微镜（SEM）和透射电子显微镜（TEM）分析进行了MAX相碳化物衍生陶瓷纳米结构（CDCN）的结构表征。随后，将CDCN与Araldite CY 225（DGEBA）以不同的百分比混合，并使用Aradur HY 925固化剂在130摄氏度下进行热固化，制成环氧Ti3SiC2纳米复合材料。研究了CDCN纳米填料对环氧流变学，玻璃化转变温度（T-g），热稳定性，弯曲和压缩强度，显微硬度，干滑动磨损和摩擦性能的影响。已发现，与其他陶瓷填料不同，CDCN与环氧树脂发生化学反应并易于分散在聚合物基质中，而没有任何有害的结构缺陷。这导致了理化均匀的微观结构的形成。用CDCN填料制备的环氧树脂复合材料的机械强度和硬度提高了50％。磨损分析趋势表明，Ti3SiC2纳米增强材料可能会形成润滑摩擦化学膜，从而降低磨损率和摩擦系数。这项工作意义重大，可以从MAX相碳化物家族中找到一种新型的纳米填料，该填料具有自润滑界面，可生产用于最先进工程应用的机械可靠，耐损伤的环氧复合材料。

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