粉末冶金法制备碳纳米管增强金属基复合材料研究进展

粉末冶金法具有工艺灵活,可设计性强等特点,是制备碳纳米管增强金属基复合材料的重要制备方法之一。简述了粉末冶金工艺制备金属基复合材料的流程和工艺特点,枚举若干实例总结了粉末冶金法制备碳纳米管增强金属基复合材料的性能特点,以及国内外研究现状,展望了该类材料未来发展前景。     

碳纳米管增强金属基复合材料的研究现状及展望

首先介绍了碳纳米管的性质和优点,并讨论了将其应用于制备金属基复合材料方面的优势.从制备方法、材料性能等方面阐述了目前国内外对碳纳米管增强金属基复合材料的研究现状,并对碳纳米管增强金属基复合材料研究的发展前景进行了展望.     

碳纳米管增强金属基复合材料的研究现状及展望

首先介绍了碳纳米管的性质和优点，并讨论了将其应用于制备金属基复合材料方面的优势。从制备方法、材料性能等方面阐述了目前国内外对碳纳米管增强金属基复合材料的研究现状，并对碳纳米管增强金属基复合材料研究的发展前景进行了展望。     

碳纳米管增强铜基复合材料性能研究

采用球磨混料工艺,真空热压法烧结方法制备了碳纳米管/Cu复合材料,研究了该纳米复合材料组织与性能之间的关系,分析碳纳米管对Cu基复合材料组织和性能的影响规律。结果表明:随着复合材料碳纳米管含量的增加,复合材料的孔隙增多,复合材料的硬度和相对密度逐渐下降。     

碳纳米管增强铝基复合材料的界面研究进展

碳纳米管以其稳定的结构、优异的力学性能,成为复合材料的理想增强相。其增强效果受多方面因素影响,界面是决定其增强效果的关键因素之一,也是金属基复合材料的研究重点。简要介绍了碳纳米管增强铝基(CNTs/Al)复合材料的界面结合机制及界面对复合材料性能的影响,评述了热膨胀系数、制备方法、碳纳米管纯度等多种因素对CNTs/Al复合材料界面的影响,并提出了改善界面的方法。     

网络陶瓷增强金属复合材料的研究现状

综述了目前网络陶瓷增强金属基复合材料的发展及研究现状,重点介绍了网络陶瓷预制体及复合材料的主要制备工艺,并指出了各工艺的特点.评述了网络陶瓷增强金属复合材料的性能特点,指出了目前网络陶瓷增强金属基复合材料存在的问题及解决方法,并展望了对网络陶瓷增强金属基复合材料未来的发展方向.     

累积叠轧焊合法制备颗粒增强金属基复合材料的研究现状与展望

近年来,累积叠轧焊合法已经成为制备颗粒增强金属基复合材料的一种新颖工艺。介绍了累积叠轧焊合法制备复合材料的工艺原理,综述了累积叠轧过程中的颗粒增强金属基复合材料的金属基体与增强颗粒固相复合机制、强化机制以及复合材料性能。同时展望了用累积叠轧焊合法制备颗粒增强金属基复合材料的研究趋势。     

碳纳米管增强铜基复合材料性能及产业化应用研究现状

碳纳米管（CNT）增强铜基复合材料作为一种新型金属基复合材料，在集成电路、航天航空、汽车运输等领域展现了广阔的应用前景。综述了碳纳米管增强铜基复合材料摩擦学、电学、热物理学等性能方面的研究及应用状况；分析了国内外产业化应用及其发展状况；指出了目前研究中存在的问题及其解决办法。     

碳纳米管增强铜基复合材料性能及产业化应用研究现状

碳纳米管(CNT)增强铜基复合材料作为一种新型金属基复合材料,在集成电路、航天航空、汽车运输等领域展现了广阔的应用前景。综述了碳纳米管增强铜基复合材料摩擦学、电学、热物理学等性能方面的研究及应用状况;分析了国内外产业化应用及其发展状况;指出了目前研究中存在的问题及其解决办法。     

纤维增强金属基复合材料及应用

讨论了纤维增强金属基复合材料中制造工艺及纤维的种类，优缺点，并列举了一些碳纤维增强金属基复合材料的应用实例。     

纳米材料增强复合钎料的研究进展

综合评述了纳米材料增强复合钎料的研究与应用现状。首先介绍了纳米材料增强复合钎料的制备方法,讨论了机械混合法与原位合成法的工艺及特点,然后分别从金属颗粒、氧化物或其他化合物及碳纳米材料3个方面来介绍纳米材料对复合钎料微观组织及性能的影响。重点指出了具有优异性能的碳纳米管与石墨烯材料增强复合钎料的研究进展,并对其发展趋势进行分析和展望。     

Wear resistant coatings: Silica sol-gel reinforced with carbon nanotubes

Pin-on-disc wear experiments have been carried out on sol-gel silica coatings reinforced with 0.1 wt.% carbon nanotubes (CNTs) deposited on WE54 magnesium alloy substrates by the dip-coating technique. Sol-gel solutions were fabricated using two different procedures: mechanical mixing (MM) and ultrasonic probe mixing. Dry sliding wear tests have been carried out at load of 1 N, speed of 0.1 m/s and sliding distance of 60 m. Friction coefficients were obtained from the tests and the specific wear rates (k) were calculated. The fabrication procedure of the coating influences its morphology and wear resistance. Friction coefficient was found to vary slightly with the addition of the CNTs. The wear volume of the magnesium substrate coated decreased by 40% and 80%, in terms of k, by using unreinforced and CNT-reinforced MM coatings, respectively. In MM layers reinforced with CNT uniform dispersion of the nanotubes was reached and toughening of the ceramic coating by pull-out and crack bridging mechanisms was observed.     

Vibration analysis of CNT-reinforced functionally graded rotating cylindrical panels using the element-free kp-Ritz method

In this paper, analysis of free vibration of carbon nanotube (CNT) reinforced functionally graded rotating cylindrical panels is presented. The analysis is performed by using the element-free kernel particle Ritz method or in short the kp-Ritz method. The rotating cylindrical panels are reinforced by single-walled carbon nanotubes (SWCNTs) with different types of distributions along thickness direction of the panels. Extended rule of mixture is selected to estimate the effective material properties of the resulting nanocomposite rotating panels. Two-dimensional displacement fields of the plates are approximated by a set of mesh-free kernel particle functions. The discretized governing eigen-equations are developed via the Ritz procedure. This kp-Ritz method enforces essential boundary conditions through the full transformation method. Detailed parametric studies have been carried out to reveal the influences of volume fraction of carbon nanotubes, edge-to-radius ratio and rotation speed on the frequency characteristics, with mode shape visualization provided. In addition, effects of different boundary conditions and types of distributions of carbon nanotubes are examined in detail.     

碳纳米管增强树脂力学性能设计

碳纳米管作为增强材料可改善树脂自身性能正备受关注。本文综述了碳纳米管增强树脂力学性能影响因素,同时对目前公开发表的几种预测碳纳米管增强树脂复合材料模量及破坏强度的方法进行了介绍与分析。最后,提出了碳纳米管增强树脂设计研究中面临的问题,并对今后研究动向进行了展望。     

A strategy for improving mechanical properties of a fiber reinforced epoxy composite using functionalized carbon nanotubes

Carbon fiber reinforced epoxy composite laminates are studied for improvements in quasi static strength and stiffness and tension-tension fatigue cycling at stress-ratio (R-ratio) = +0.1 through strategically incorporating amine functionalized single wall carbon nanotubes (a-SWCNTs) at the fiber/fabric-matrix interfaces over the laminate cross-section. In a comparison to composite laminate material without carbon nanotube reinforcements there are modest improvements in the mechanical properties of strength and stiffness; but, a potentially significant increase is demonstrated for the long-term fatigue life of these functionalized nanotube reinforced composite materials. These results are compared with previous research on the cyclic life of this carbon fiber epoxy composite laminate system reinforced similarly with side wall fluorine functionalized industrial grade carbon nanotubes. Optical and scanning electron microscopy and Raman spectrometry are used to confirm the effectiveness of this strategy for the improvements in strength, stiffness and fatigue life of composite laminate materials using functionalized carbon nanotubes.     

碳纳米管增强铝基复合材料的界面特性及增强机理研究进展

采用简单的电热板在空气气氛中、430℃加热氧化Fe片以及沉积在硅基片上的Fe膜,在Fe基体表面分别制备出了一维α-Fe2O3纳米线和纳米带,并研究了不同Fe基体热氧化制备的纳米结构的场发射特性。结果表明：Fe片和Fe膜热氧化获得的α-Fe2O3纳米结构的开启电场分别为14．5V／μm和13．3V／μm;α-Fe2O3纳...     

CFRP层合板抗分层损伤技术研究进展

碳纤维/聚合物基复合材料(CFRP)具有高比强度、高比模量、性能可设计、结构尺寸稳定性高、耐疲劳、耐腐蚀等优点而被广泛应用于陆、海、空、天等高性能载具中。各类碳纤维复合材料结构中,层合结构是主要结构形式。传统的CFRP层合结构中各铺层之间缺少纤维增强,故而导致CFRP层压板易产生层间分层且抗冲击损伤能力较低,因此层合板抗分层损伤和破坏方法成为关键问题和研究热点。本文综述了层合板抗分层损伤的方法,并对这些方法的适用性、优缺点进行了比较与阐述;重点归纳了利用碳纳米管提升层合板抗分层损伤的研究进展,并对碳纳米管的性能、增韧机理进行了阐述以及碳纳米管的增韧方法和效果进行了综述与归纳,讨论了"碳纳米管层间Z向增韧"进一步提高复合材料层间性能的可能性。     

Analytical modeling of low velocity impact on carbon nanotube-reinforced composite (CNTRC) plates

In this paper, a new analytical model for behavior of carbon nanotubes reinforced composite plates under low velocity impact has been presented. Nanotubes aligned, straight and randomly oriented are distributed on rectangular simply supported composite plate. The Mori–Tanaka model is used to obtain effective mechanical properties of composites reinforced with nanotubes consisting of aligned, straight and randomly oriented carbon nanotubes embedded in a polymer matrix. The analytical model based on the first-order shear deformation theory and spring-mass model. The results of analytical model are compared with the results of low velocity impact on fiber-reinforced polymer composites. The results show that the deflection and energy absorption of plate in a randomly oriented distribution is more than aligned straight of carbon nanotubes in the composite layers.     

Scratch and wear resistance of polyamide 6 reinforced with multiwall carbon nanotubes

While carbon nanotubes have been used for a variety of purposes, it was not known whether they can improve tribological properties of polymers. Polyamide 6 (PA6) has been reinforced with 0.2, 0.5 and 1.0 wt% of multiwall carbon nanotubes (MWCNTs) by melt mixing process and characterized by scanning electron microscopy (SEM), transmission electron microscopy, thermogravimetric analysis (TGA), scratching, sliding wear and tensile testing. TGA results for the air atmosphere show that MWCNTs shift the onset of thermal degradation to higher temperatures. Sliding wear tests show that the penetration depth decreases as the concentration of carbon nanotubes increases. However, the viscoelastic healing is hampered by the MWCNTs presence and the residual depths increase at the same time. Narrower scratch groove widths are seen in SEM for composites with MWCNTs, and scratch hardness increases. Tensile tests show an increase of 27% in the Young modulus value upon addition of 1.0% of MWCNTs. The stress at yield is also higher for the nanocomposites.     

Potential and challenges of metal-matrix-composites reinforced with carbon nanofibers and carbon nanotubes

With a continuous improvement of the production techniques for carbon nanofibers and carbon nanotubes along with an improvement of the available qualities of the materials, these reinforcements have been introduced into polymers, ceramics and metals. While in the field of polymers first success stories have been published on carbon nanofiller reinforcements, up to now metals containing these types of nanofillers are still a topic of intensive research. Basically a similar situation were found in those days, when micron sized carbon fibers came on the market. Today many applications of carbon fiber reinforced composites are existing, while metals reinforced with conventional carbon fibers are still only found in niche applications.