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- E-ISSN 2288-8985
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Growth Mechanisms of Graphite Spherulites in the Nodular Cast Iron and the High-pressure-treated Ni-C alloy
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2000, v.13 no.2, pp.200-207
Park,
J., Ahn,
J., Kim,
G., &
Kim,
S.
(2000). Growth Mechanisms of Graphite Spherulites in the Nodular Cast Iron and the High-pressure-treated Ni-C alloy. Analytical Science and Technology, 13(2), 200-207.
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Abstract
The growth mechanisms of graphite spherulite both in the nodular cast iron and the high pressuretreated Ni-C alloy were investigated by SEM, HRTEM and EELS. The internal microstructure and lattice image of graphite spherulite extracted from Ni-C alloy were compared with those of graphite spherulite extracted from the nodular cast iron. The ratios of <TEX>$sp^2$</TEX> and <TEX>$sp^3$</TEX> bonding in the respective graphite spherulite measured by EELS, are compared each other. The graphite spherulite of Ni-C alloy had little internal defects and much <TEX>$sp^3$</TEX> carbon species compared to that of the nodular cast iron. Present difference in microstructural features and bonding characters indicated that the graphite spheruites in the high pressuretreated Ni-C alloy grew by different mechanism compared with those in the nodular cast iron.
- keywords
- Graphite spberulite, Nodular cast iron, Ni-C alloy, EELS, HRTEM, High pressure, Carbon bonding
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