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Flame synthesis of carbon nanostructures on Ni-plated hardmetal substrates.

Zhu H, Kuang T, Zhu B, Lei S, Liu Z, Ringer SP - Nanoscale Res Lett (2011)

Bottom Line: In this article, we demonstrate that carbon nanostructures could be synthesized on the Ni-plated YG6 (WC-6 wt% Co) hardmetal substrate by a simple ethanol diffusion flame method.The growth mechanism of such carbon nanostructures is discussed.This work may provide a strategy to improve the performance of hardmetal products and thus to widen their potential applications.

View Article: PubMed Central - HTML - PubMed

Affiliation: Analytical and Testing Center, South China University of Technology, Guangzhou 510640, China. tckuang@scut.edu.cn.

ABSTRACT
In this article, we demonstrate that carbon nanostructures could be synthesized on the Ni-plated YG6 (WC-6 wt% Co) hardmetal substrate by a simple ethanol diffusion flame method. The morphologies and microstructures of the Ni-plated layer and the carbon nanostructures were examined by various techniques including scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The growth mechanism of such carbon nanostructures is discussed. This work may provide a strategy to improve the performance of hardmetal products and thus to widen their potential applications.

No MeSH data available.


The SEM morphologies of the carbon nanostructures deposited in different zones for different time lengths. The upper images are the center zone (a) and the marginal zone (b) of the 30-min sample, and the lower images are the center zone (c) and the marginal zone (d) of the 60-min sample.
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Figure 4: The SEM morphologies of the carbon nanostructures deposited in different zones for different time lengths. The upper images are the center zone (a) and the marginal zone (b) of the 30-min sample, and the lower images are the center zone (c) and the marginal zone (d) of the 60-min sample.

Mentions: Figure 4 shows the SEM images of the carbon nanostructures deposited on the YG6 hardmetal with the Ni-plated interlayer. Due to the limited flame size, different contact zones would form on the hardmetal substrate. After a 30-min deposition, the flame-deposited materials in the center zone (corresponding to the inner flame) can be seen in Figure 4a. A close inspection showed that the nanofibrous carbon materials (i.e., CNFs/CNTs) grew disorderly and entangled with each other. The carbonaceous sizes are in a wide distribution and the longest ones are 3 to 4 μm in length. This can be attributed to two possible reasons. One is the slightly inhomogeneous electro-plated Ni particles and the other is the relatively weaker catalytic activity in the low-temperature marginal zone than that in the high-temperature center zone. In contrast, the products on the marginal surface of the 30-min sample (corresponding to the outer flame) are generally uniform and continuous in flocculent shape as shown in Figure 4b. Apparently, it can be seen from the SEM images that the tips of the carbon nanostructures are attached by some small particles with light contrast. The composition of these embedded nanoparticles was verified to metal Ni by energy dispersive X-ray spectroscopy (EDS, not shown here). As reported previously [7-10], the Ni nanoparticles acted as a catalyst for the formation of these carbon nanostructures.


Flame synthesis of carbon nanostructures on Ni-plated hardmetal substrates.

Zhu H, Kuang T, Zhu B, Lei S, Liu Z, Ringer SP - Nanoscale Res Lett (2011)

The SEM morphologies of the carbon nanostructures deposited in different zones for different time lengths. The upper images are the center zone (a) and the marginal zone (b) of the 30-min sample, and the lower images are the center zone (c) and the marginal zone (d) of the 60-min sample.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211419&req=5

Figure 4: The SEM morphologies of the carbon nanostructures deposited in different zones for different time lengths. The upper images are the center zone (a) and the marginal zone (b) of the 30-min sample, and the lower images are the center zone (c) and the marginal zone (d) of the 60-min sample.
Mentions: Figure 4 shows the SEM images of the carbon nanostructures deposited on the YG6 hardmetal with the Ni-plated interlayer. Due to the limited flame size, different contact zones would form on the hardmetal substrate. After a 30-min deposition, the flame-deposited materials in the center zone (corresponding to the inner flame) can be seen in Figure 4a. A close inspection showed that the nanofibrous carbon materials (i.e., CNFs/CNTs) grew disorderly and entangled with each other. The carbonaceous sizes are in a wide distribution and the longest ones are 3 to 4 μm in length. This can be attributed to two possible reasons. One is the slightly inhomogeneous electro-plated Ni particles and the other is the relatively weaker catalytic activity in the low-temperature marginal zone than that in the high-temperature center zone. In contrast, the products on the marginal surface of the 30-min sample (corresponding to the outer flame) are generally uniform and continuous in flocculent shape as shown in Figure 4b. Apparently, it can be seen from the SEM images that the tips of the carbon nanostructures are attached by some small particles with light contrast. The composition of these embedded nanoparticles was verified to metal Ni by energy dispersive X-ray spectroscopy (EDS, not shown here). As reported previously [7-10], the Ni nanoparticles acted as a catalyst for the formation of these carbon nanostructures.

Bottom Line: In this article, we demonstrate that carbon nanostructures could be synthesized on the Ni-plated YG6 (WC-6 wt% Co) hardmetal substrate by a simple ethanol diffusion flame method.The growth mechanism of such carbon nanostructures is discussed.This work may provide a strategy to improve the performance of hardmetal products and thus to widen their potential applications.

View Article: PubMed Central - HTML - PubMed

Affiliation: Analytical and Testing Center, South China University of Technology, Guangzhou 510640, China. tckuang@scut.edu.cn.

ABSTRACT
In this article, we demonstrate that carbon nanostructures could be synthesized on the Ni-plated YG6 (WC-6 wt% Co) hardmetal substrate by a simple ethanol diffusion flame method. The morphologies and microstructures of the Ni-plated layer and the carbon nanostructures were examined by various techniques including scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The growth mechanism of such carbon nanostructures is discussed. This work may provide a strategy to improve the performance of hardmetal products and thus to widen their potential applications.

No MeSH data available.