The use of flake powder metallurgy to produce carbon nanotube (CNT)/aluminum composites with a homogenous CNT distribution

Jiang, Lin; Li, Zhiqiang; Fan, Genlian; Cao, Linlin; Zhang, Di

doi:10.1016/j.carbon.2011.12.057

Cited by 354 publications

(118 citation statements)

References 19 publications

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“…49 As such, degradation of strength with MoTe 2 content is to be expected given the platelet aggregation observed in Fig 1E. The strain at break also decreases relatively uniformly with increased levels of MoTe 2 . This behaviour has been observed for several other MMCs 9,24,25,28,30,32,34 and indeed polymer nano-composite materials 7,13,48,[50][51][52][53][54][55] .…”

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confidence: 70%

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Reinforcement of metal with liquid-exfoliated inorganic nano-platelets

May

Khan

Coleman

2013

Applied Physics Letters

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We have prepared metal matrix composites (MMCs) of a pewter alloy filled with liquid-exfoliated Molybdenum Telluride (MoTe 2 ) nano-platelets. The combination of MoTe 2 and pewter was chosen due to their near-identical densities, thus reducing the scope for buoyancy-induced separation during melt mixing. The addition of nanofiller results in a doubling of the Young's modulus, Y, for a volume fraction, V f , of <1 % MoTe 2 , corresponding to a reinforcement of dY/dV f =110 GPa. We find that this degree of reinforcement to be reasonably consistent with that predicted by a simplified version of Halpin-Tsai theory.Over the last decade, the study of 2-dimensional (2D) nano-materials has become one of the most active areas of nanoscience. Since the discovery of graphene 1 and more recently, the surge of interest in inorganic 2D materials, 2-4 such nanostructures have been used to demonstrate a host of applications in areas from composites to energy storage to optoelectronics. 2-5 Particularly important will be applications which harness the impressive mechanical properties of 2D nano-materials. It is well known that graphene is the strongest, stiffest material known to man with strength and elastic modulus values of 130 and 1000 GPa respectively. 6 Indeed graphene nanosheets have been used in a number of mechanical applications particularly as a reinforcing filler in composites. 7-9 Less well known is the fact that boron nitride (BN) nanosheets display very similar mechanical properties to graphene. 10 Indeed a host of 2D nano-materials have Young's moduli which surpass 100 GPa. 11 Perhaps more importantly these materials may have strengths 11 as high as 36 GPa (estimated for layered WO 2 assuming its strength,  B , and modulus, Y, scale in a manner similar to MoS 2 : Y=11.7 B ) 12 . However, to the author's knowledge only three papers describe using inorganic 2D materials to mechanically reinforce any matrices; in all cases reinforcement of polymer matrices with BN nanosheets. [13][14][15] In many ways this is surprising. It was recently shown that a range of layered compounds can be exfoliated by sonication in liquids to give large quantities of 2D nanosheets. [16][17][18][19] The advantage of such liquid processing is that the resultant suspensions can be used to make a range of materials and structures including composites. 3 Because of the exceptional mechanical properties of 2D materials, 11 we would expect such composites to display enhanced mechanical properties.The vast majority of reports on nano-composites describe using nano-materials to reinforce polymer matrices. 8 Yet, many other types of composites exist; including for

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confidence: 70%

“…Of nanomaterial-reinforced MMCs, much attention has been devoted to using carbon nanotubes (CNTs) to reinforce metals. [23][24][25][26][27][28][29][30][31][32][33][34][35][36] Additionally, Boron Nitride nanotubes have been used to reinforce aluminium. 37 Only recently have reports surfaced where two dimensional filler materials have been utilised in MMCs.…”

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confidence: 99%

Reinforcement of metal with liquid-exfoliated inorganic nano-platelets

May

Khan

Coleman

2013

Applied Physics Letters

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“…In this work, a novel flaky powder metallurgy route was applied to prepare the graphene/Al composites with bioinspired layered structures, which has been proved to be effective to fabricate the carbon nanotubes reinforced aluminum composites in our previous work [26,27]. In this route, the GO (95% in purity) nanosheets modified with hydroxyl or carboxyl groups on their surface rather than the graphene were applied as the raw material.…”

Section: Methodsmentioning

confidence: 99%

Composite structural modeling and tensile mechanical behavior of graphene reinforced metal matrix composites

et al. 2017

Sci. China Mater.

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Owing to its distinguished mechanical stiffness and strength, graphene has become an ideal reinforcing material in kinds of composite materials. In this work, the graphene (reduced graphene oxide) reinforced aluminum (Al) matrix composites were fabricated by flaky powder metallurgy. Tensile tests of pure Al matrix and graphene/Al composites with bioinspired layered structures are conducted. By means of an independently developed Python-based structural modeling program, three-dimensional microscopic structural models of graphene/Al composites can be established, in which the size, shape, orientation, location and content of graphene can be reconstructed in line with the actual graphene/Al composite structures. Elastoplastic mechanical properties, damaged materials behaviors, grapheneAl interfacial behaviors and reasonable boundary conditions are introduced and applied to perform the simulations. Based on the experimental and numerical tensile behaviors of graphene/Al composites, the effects of graphene morphology, graphene-Al interface, composite configuration and failure behavior within the tensile mechanical deformations of graphene/Al composites can be revealed and indicated, respectively. From the analysis above, a good understanding can be brought to light for the deformation mechanism of graphene/Al composites.

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“…Nickel can cause allergy for some users so replacing it with nitrogen not only increased the mechanical properties but also it was cost effective compared with other nickel composition alloys [4,5]. The nitrogen had a greater solubility in austenite than in ferrite; the solubility of nitrogen in austenite was 2.4% while in ferrite it was only 0.1% at the temperature of 1,100°C [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Nitrogen as an Alloying Element in WC9 Grade Steel

Vishnuh

Sudhakar

Tamilarasu

et al. 2017

Archives of Metallurgy and Materials

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In the present work the effect of nitrogen on WC9 alloy at various weight percentages was analyzed and tested for their microstructural and mechanical properties. The nitrogen was added at 0.05, 0.10, 0.15, 0.20 and 0.25 wt. % in the solid form as nitrided ferrochrome to WC9 alloy. The samples were heat treated by solution annealing process at a temperature of 1100°C for 5 hours to improve the austenitic formation. Microstructures and mechanical properties such as tensile strength, yield strength, hardness, % elongation and % reduction of WC9-N alloy were examined. It was observed that increasing nitrogen wt. % increases the mechanical properties. The obtained mechanical properties were compared with base WC9 and C12A grade steel, where it was found to be replacement for C12A grade steel at its composition at lower end. The material cost analysis for WC9-N and C12A grade steel was done and both were compared.

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The use of flake powder metallurgy to produce carbon nanotube (CNT)/aluminum composites with a homogenous CNT distribution

Cited by 354 publications

References 19 publications

Reinforcement of metal with liquid-exfoliated inorganic nano-platelets

Reinforcement of metal with liquid-exfoliated inorganic nano-platelets

Composite structural modeling and tensile mechanical behavior of graphene reinforced metal matrix composites

Experimental Analysis of Nitrogen as an Alloying Element in WC9 Grade Steel

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