Tensile properties of carbon nanotube reinforced aluminum nanocomposite fabricated by plasma spray forming

Laha, Tapas; Chen, Y.; Lahiri, Debrupa; Agarwal, Arvind

doi:10.1016/j.compositesa.2009.02.007

Cited by 172 publications

(69 citation statements)

References 34 publications

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“…were not clearly recognized and no solid evidence of the uniform MWCNT dispersion within the matrix was provided. [5][6][7][8][9][10][11] Therefore, the sole contribution of MWCNTs in the strengthening of the Al matrix could not be understood. In these processing methods, the issue of damaging MWCNTs during ball milling and high-temperature consolidation also needs to be carefully considered.…”

Section: Introductionmentioning

confidence: 99%

“…4) However, bundled structure of chemically stable, pristine MWCNTs has been the main challenge to achieving the expected structural reinforcement. 4) To address this challenge, the mechanical alloying [5][6][7][8] approach followed by hot rolling, 9) hot extrusion 5) and plasma spraying 10,11) were previously employed and some tensile improvements were reported, though the contribution of responsible strengthening mechanisms (effects of MWCNT itself, MWCNT-induced prohibition of Al grain growth, work hardening and grain refinement of Al particles during ball milling, etc.) were not clearly recognized and no solid evidence of the uniform MWCNT dispersion within the matrix was provided.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Walled Carbon Nanotube-Aluminum Matrix Composites Prepared by Combination of Hetero-Agglomeration Method, Spark Plasma Sintering and Hot Extrusion

et al. 2011

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Multi-walled carbon nanotubes (MWCNTs) with outstanding mechanical properties are considered as an ultimate reinforcement for conventional metals such as aluminum (Al), though they require uniform dispersion and intimate contacts with the host metal matrix. However, bundled structure of chemically stable, pristine MWCNTs has been the main challenge to achieving the expected structural reinforcement. In addition, the sole contribution of MWCNTs in strengthening the metal matrix has not been recognized yet, due to the concurrent strengthening mechanisms such as metal's work hardening, grain refinement, etc. Here, we prepared MWCNT-Al matrix composite powders with uniform MWCNT dispersion by using hetero-agglomeration principle, and fabricated fully dense 1.0 vol% MWCNT-Al matrix composite bulk by using spark plasma sintering (SPS) and a subsequent hot extrusion process, with a 40% improved tensile strength and an elongation to failure of 27.3% similar to that of cast pure Al. During the SPS process, the nanoscale surface defects of MWCNTs were infiltrated by momentarily formed liquid Al and an intimate Al 4 C 3 -free interface was formed between MWCNTs and bare Al matrix. After the hot extrusion process, straight MWCNTs aligned in the extrusion axis found intimate contacts with the dynamically recovered, crack-free Al matrix. Our study suggests that the tensile improvement realized in our extruded/SPSed composites is directly originated from an effective load transfer at the MWCNT/Al interface, because no evidence of Al work hardening or the formation of interfacial Al 4 C 3 crystals was detected.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-Walled Carbon Nanotube-Aluminum Matrix Composites Prepared by Combination of Hetero-Agglomeration Method, Spark Plasma Sintering and Hot Extrusion

et al. 2011

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“…ose processing routes include powder metallurgy [6][7][8][9][10][11][12][13][14], high-energy ball milling [15,16], friction stir processing [17], spark plasma sintering [18], plasma spraying [19][20][21], and more recently laser sintering [22]. However, the obtained results are still not completely satisfactory, because the extreme processing conditions, either thermal or impact, can damage the CNT structure and cause a detrimental effect on the final mechanical properties of the composite.…”

Section: Introductionmentioning

confidence: 81%

Core/Shell Structure of TiO₂‐Coated MWCNTs for Thermal Protection for High‐Temperature Processing of Metal Matrix Composites

Rodriguez

Travessa

2018

Advances in Materials Science and Engineering

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e production of metal matrix composites with elevated mechanical properties depends largely on the reinforcing phase properties. Due to the poor oxidation resistance of multiwalled carbon nanotubes (MWCNTs) as well as their high reactivity with molten metal, the processing conditions for the production of MWCNT-reinforced metal matrix composites may be an obstacle to their successful use as reinforcement. Coating MWCNTs with a ceramic material that acts as a thermal protection would be an alternative to improve oxidation stability. In this work, MWCNTs previously functionalized were coated with titanium dioxide (TiO 2 ) layers of different thicknesses, producing a core-shell structure. Heat treatments at three different temperatures (500°C, 750°C, and 1000°C) were performed on coated nanotubes in order to form a stable metal oxide structure. e MWCNT/TiO 2 hybrids produced were evaluated in terms of thermal stability. ermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (RS), and X-ray photoelectron spectroscopy (XPS) were performed in order to investigate TiO 2 -coated MWCNT structure and thermal stability under oxidative atmosphere. It was found that the thermal stability of the TiO 2 -coated MWCNTs was dependent of the TiO 2 layer morphology that in turn depends on the heat treatment temperature.

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“…, 나노 크기의 구형 또는 판상 구조의 적층 형태를 지닌 세라믹 성분 3,4) , 그리고 † [6][7][8][9][10] , 플라즈마처리 11,12) , UV-오존처리 13,14) 등으로 CNT 표면에 극성기를 도입 하는 방법이 가장 널리 이용되고 있다. …”

Section: 서 론unclassified

Effect of Polymer Wrapping on the Properties of ABS/MWNT Nanocomposites

Kim¹,

Min²

2010

Textile Coloration and Finishing

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Abstract-ABS/MWNT nanocomposites were prepared by using MWNT wrapped with SAN through melt compounding. Effect of wrapping of MWNT by SAN on the morphology, mechanical and electrical properties of ABS/MWNT were analyzed. It was found that SAN could wrap MWNT effectively indicated by the increased thickness after wrapping, which is presumably due to helical structure of polyacrylonitrile component in a block copolymer of SAN. MWNT was observed to be dispersed more evenly in ABS matrix by SAN wrapping, which resulted in improved tensile properties of the composites. On the other hand, there was little effect on the impact strength and electrical properties of ABS having inherently high impact strength.

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Tensile properties of carbon nanotube reinforced aluminum nanocomposite fabricated by plasma spray forming

Cited by 172 publications

References 34 publications

Multi-Walled Carbon Nanotube-Aluminum Matrix Composites Prepared by Combination of Hetero-Agglomeration Method, Spark Plasma Sintering and Hot Extrusion

Multi-Walled Carbon Nanotube-Aluminum Matrix Composites Prepared by Combination of Hetero-Agglomeration Method, Spark Plasma Sintering and Hot Extrusion

Core/Shell Structure of TiO₂‐Coated MWCNTs for Thermal Protection for High‐Temperature Processing of Metal Matrix Composites

Effect of Polymer Wrapping on the Properties of ABS/MWNT Nanocomposites

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Tensile properties of carbon nanotube reinforced aluminum nanocomposite fabricated by plasma spray forming

Cited by 172 publications

References 34 publications

Multi-Walled Carbon Nanotube-Aluminum Matrix Composites Prepared by Combination of Hetero-Agglomeration Method, Spark Plasma Sintering and Hot Extrusion

Multi-Walled Carbon Nanotube-Aluminum Matrix Composites Prepared by Combination of Hetero-Agglomeration Method, Spark Plasma Sintering and Hot Extrusion

Core/Shell Structure of TiO2‐Coated MWCNTs for Thermal Protection for High‐Temperature Processing of Metal Matrix Composites

Effect of Polymer Wrapping on the Properties of ABS/MWNT Nanocomposites

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Core/Shell Structure of TiO₂‐Coated MWCNTs for Thermal Protection for High‐Temperature Processing of Metal Matrix Composites