Evolution, Control, and Effects of Interface in CNT/Al Composites: a Review

Fan, Genlian; Yu, Ziyun; Tan, Zhanqiu; Li, Zhiqiang; Zhang, Di

doi:10.1007/s40195-014-0137-0

Cited by 18 publications

(7 citation statements)

References 34 publications

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“…[93] who studied the mechanically milled CNTs/Al mixture and indicated that after ball-milling, CNTs became shorter and more broken. However, the interfacial bonding of ball-milled CNT/Al interface was still stronger than that achieved by other methods due to the mechanical interlocking [91].…”

Section: Cnt/al Interfacementioning

confidence: 76%

“…Casting and powder metallurgy (PM) has been considered as the major methods for producing CNT/Al composites along with some other novel routes like thermal spray [89] and accumulative roll-bonding [90]. Mechanical interlocking and reaction bonding are the primary bonding types of CNT/Al interface [91]. Aluminum carbide (Al 4 C 3 ) is the main reaction product between CNTs and Al matrix during consolidation due to the high temperature.…”

Section: Cnt/al Interfacementioning

confidence: 99%

“…Since the composite studied in this dissertation was fabricated by PM, the features and evolution of CNT/Al in PM will be further reviewed below. through diffusion, and the sintered compact is further densified through the elimination of pores by plastic processing [91]. Several studies on the CNT/Al composite powders have been reported…”

Section: Cnt/al Interfacementioning

confidence: 99%

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Deformation behavior in lightweight alloys: effects of rare-earth microalloying and carbon nanotube reinforcement

Mokdad¹

2021

Preprint

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One of the most important strategies for improving fuel efficiency and reducing anthropogenic emissions is vehicle lightweighting by the use of lightweight materials such as Mg and Al alloys in the automotive industry. The structural application of these alloys inevitably requires the mechanical properties and their continuous performance improvement to meet the increasingly stringent safety and durability requirements. An effective method to enhance the deformation resistance is to alloy with rare-earth (RE) elements for Mg alloys or develop composites with the addition of reinforcement for Al alloys. The objective of this dissertation was to identify the effects of RE element and carbon nanotube (CNT) reinforcement on the deformation behavior, focusing mainly on the deformation mechanisms. The deformation behavior of a RE-free extruded AZ31 Mg alloy was first studied. It was observed that the propagation of distinct twin variants led to the confinement of the spaces constrained by the fine twin lamellas. Various double twinning structures acknowledged through atomistic simulations were experimentally observed via progressive electron backscatter diffraction (EBSD) analyses during stepwise compression. The vanishing of primary {1121} embryonic twins via the nucleation and growth of either single or multiple {1012} secondary extension twins was detected, and two new ladder-like and branching-like twin-twin interaction phenomena were observed. Then a low-RE containing Mg alloy was exploited via texture and cyclic deformation studies. The addition of 0.2 wt.% Nd in ZEK100-O Mg alloy led to a weaker basal texture in comparison with AZ31 Mg alloy. Fatigue life of ZEK100 alloy was longer than that of AZ31 alloy, due to a good combination of strength with ductility. Asymmetry of hysteresis loops was improved because of texture weakening and grain refinement, however anelastic behavior largely remained arising from the presence of twinning and detwinning. The last investigation involved deformation behavior of CNT reinforced Al composites where the addition of 2.0 wt.% CNT in a 2024Al alloy led to considerable grain refinement. Deformation resistance of the composite was effectively enhanced due to CNT load transfer, Hall-Petch strengthening, thermal mismatch and Orowan looping. In a nutshell, this work constitutes a valuable benchmark for understanding the factors affecting the performance of two lightweight alloys in the automotive and aerospace applications.

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Section: Cnt/al Interfacementioning

confidence: 76%

Section: Cnt/al Interfacementioning

confidence: 99%

Section: Cnt/al Interfacementioning

confidence: 99%

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Deformation behavior in lightweight alloys: effects of rare-earth microalloying and carbon nanotube reinforcement

Mokdad¹

2021

Preprint

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“…It has also been utilized to produce CNT reinforced MMCs. Several methods have been developed, such as stir casting, die casting, and squeeze casting [26]. Due to the low cost and short processing time, casting is fit for mass production.…”

Section: ) Castingmentioning

confidence: 99%

Microstructure And Mechanical Properties Of Carbon Nanotube Reinforced Aluminum Matrix Composite

Li¹

2021

Preprint

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The carbon nanotube (CNT) was first discovered by Iijima in 1991. Carbon nanotubes have remarkable mechanical, electrical and thermal properties. Aluminum alloys are commonly used in various fields due to low density, good mechanical properties and excellent corrosion resistance. To enhance their strength, aluminum matrix composites reinforced by carbon nanotube have been recently developed. In the present work, the composite composed of 2 wt.% carbon nanotubes as the reinforcement and aluminum alloy 6061 as the matrix has been studied. It is fabricated by powder metallurgy and friction stir processing (FSP) followed by heat treatment. The main objectives of the research are to characterize the microstructure, mechanical properties as well as deformation behaviors. Optical microscopy, X-ray diffraction test, compression tests, tension tests, fractography and low cycle fatigue tests have been conducted. The prediction model for yield strength and the calculation model for Young’s modulus are analyzed and discussed.

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“…Hot compression process is proceeding with the continual generation and multiplication of dislocations, as well as the nucleation and growth of DRXed grains [20]. Once the accumulated strain exceeds e c value, the DRX is occurred.…”

Section: Occurrence Of Drx Reflected By True Stressstrain Curvesmentioning

confidence: 99%

Dynamic Recrystallization Behavior of Bimodal Size SiCp-Reinforced Mg Matrix Composite during Hot Deformation

Wang

Deng

Zhou

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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The (submicron ? micron) bimodal size SiCp-reinforced Mg matrix composite was compressed at the temperature of 270-420°C and strain rate of 0.001-1 s -1 . Then, dynamic recrystallization (DRX) behavior of the composite was investigated by thermodynamic method and verified by microstructure analysis. Results illustrated that the composite possess the lower critical strain and higher DRX ratio as compared to monolithic Mg alloys during hot deformation process. The predicted DRX ratio increased with the proceeding of compression, which was well consistent with the experimental value. Results from thermodynamic calculation suggested that the occurrence of DRX could be promoted by SiCp, which would be further proved by microstructure analysis. Formation of particle deformation zone around micron SiCp played a significant role in promoting DRX nucleation. Nevertheless, the distribution of submicron SiCp was increasingly uniform with the proceeding of compression, which could fully restrain grain growth. Therefore, the corporate effects of micron and submicron SiCp on DRX contributed to the improvement of DRXed ratio and the refinement of grain size for the composite during compression process.

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Evolution, Control, and Effects of Interface in CNT/Al Composites: a Review

Cited by 18 publications

References 34 publications

Deformation behavior in lightweight alloys: effects of rare-earth microalloying and carbon nanotube reinforcement

Deformation behavior in lightweight alloys: effects of rare-earth microalloying and carbon nanotube reinforcement

Microstructure And Mechanical Properties Of Carbon Nanotube Reinforced Aluminum Matrix Composite

Dynamic Recrystallization Behavior of Bimodal Size SiCp-Reinforced Mg Matrix Composite during Hot Deformation

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