B Muralidhara, Babu S P Kumaresh, B Suresha, K K Yogesha, M G Vasundhara, G K Kalavathi, Goudar Dayanand M, Kurahatti Rajashekar V, Bhat Subraya Krishna
Department of Metallurgical & Materials Engineering, National Institute of Technology, Tiruchirappalli, India.
Department of Mechanical Engineering, Government Engineering College, Mosalehosahalli, 573212, India.
Sci Rep. 2025 Aug 16;15(1):30019. doi: 10.1038/s41598-025-15142-1.
This work explores the mechanical, thermal, and tribological characteristics of carbon fabric reinforced epoxy (CF-Ep) composites filled with halloysite nanotubes (HNT). The mechanical properties were evaluated, including hardness, interlaminar shear strength (ILSS), tensile strength, and flexural strength. The enhanced curing and even dispersion of HNTs in the epoxy matrix were validated by DSC, FTIR, and SEM measurements. Thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA) demonstrated improved thermal stability and damping, especially for the 0.75 wt.% HNT composite. Tribological performance was investigated utilizing a pin-on-disc configuration (60 N, 3 m/s) and silica sand (212 µm, 30 N, 2.38 m/s) under three-body abrasion and dry sliding wear, respectively. Hardness was highest at 1.75 wt.% HNT, and wear resistance and mechanical performance were best at 0.75 wt.% HNT composite. Surface damage, including matrix separation, micro-ploughing, and fragmentation, was lessened in 0.75 wt.% HNT composites, according to scanning electron microscopy worn surfaces. Using Minitab 17 and the Taguchi approach, wear experiments was created using an L16 orthogonal array. There were four levels of variation in three factors: load (10-40 N), abrading distance (250-1000 m), and HNT content (0-2.75 wt.%). The most important variables influencing wear volume loss were found to be load + distance and load + filler interactions using ANOVA and regression analysis. Scanning electron microscopy revealed that H0.75% HNT-filled composites had the best resistance to wear because they showed less surface damage mechanisms, such as fragmentation, micro-ploughing, and matrix detachment, when they were worn-out by dry sliding or abrasion. Overall, by strengthening interfacial bonding, improving load transfer, and creating a protective tribolayer that decreased material loss and surface damage during abrasion, HNTs improved mechanical and wear properties. Specifically, the 0.75 wt.% HNT composite showed outstanding heat stability and wear resistance, which made it a good option for high-performance uses such as power plant chute and automobile liners.
这项工作探索了填充有埃洛石纳米管(HNT)的碳纤维增强环氧树脂(CF-Ep)复合材料的力学、热学和摩擦学特性。对其力学性能进行了评估,包括硬度、层间剪切强度(ILSS)、拉伸强度和弯曲强度。通过差示扫描量热法(DSC)、傅里叶变换红外光谱(FTIR)和扫描电子显微镜(SEM)测量验证了HNT在环氧基体中的固化增强和均匀分散。热重分析(TGA)和动态力学分析(DMA)表明热稳定性和阻尼得到了改善,特别是对于0.75 wt.%的HNT复合材料。分别在三体磨料磨损和干滑动磨损条件下,利用销盘配置(60 N,3 m/s)和硅砂(212 µm,30 N,2.38 m/s)研究了摩擦学性能。硬度在HNT含量为1.75 wt.%时最高,耐磨性和力学性能在0.75 wt.%的HNT复合材料中最佳。根据扫描电子显微镜观察的磨损表面,在0.75 wt.%的HNT复合材料中,包括基体分离、微犁削和破碎在内的表面损伤有所减轻。使用Minitab 17和田口方法,采用L16正交阵列设计了磨损实验。有三个因素的四个变化水平:载荷(10 - 40 N)、磨损距离(250 - 1000 m)和HNT含量(0 - 2.75 wt.%)。使用方差分析(ANOVA)和回归分析发现,影响磨损体积损失的最重要变量是载荷 + 距离以及载荷 + 填料的相互作用。扫描电子显微镜显示,填充0.75% HNT的复合材料具有最佳的耐磨性,因为在干滑动或磨损时,它们表现出较少的表面损伤机制,如破碎、微犁削和基体脱离。总体而言,通过加强界面结合、改善载荷传递以及形成减少磨损过程中材料损失和表面损伤的保护性摩擦层,HNT改善了力学性能和耐磨性能。具体而言,0.75 wt.%的HNT复合材料表现出出色的热稳定性和耐磨性,这使其成为用于发电厂溜槽和汽车衬里等高性能用途的良好选择。