Título

IN-SITU OBSERVATION OF THE REACTION BETWEEN IRON AND CARBON IN TEM

IN-SITU OBSERVATION OF THE REACTION BETWEEN IRON AND CARBON IN TEM

Autoria

Ishikawa, Nobuhiro; Kimura, Takashi; Aoyagi, Takeshi; Furuya, Kazuo; Harada, Takahiro; Inami, Takashi

DOI

10.5151/5463-5463-0011

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Resumo

The in-situ observation of the reaction between iron and carbon in TEM was carried out. The contact between iron and carbon was realized utilizing the carbon deposition on the surface of iron and FIB enabled to prepare TEM specimens. The reaction occurred beyond 823K as the precipitation from the boundary between iron and carbon and the precipitates grew into the carbon layer. The concentration of the iron in the precipitates became lower with the increase of distance from the boundary. The growth rate of the precipitates was 100-200nm/min at 873K. The images of the precipitates and the results of EDS indicated the precipitates were transformation of the carbon from amorphous to crystal promoted by the diffusion of the iron atoms.

 

The in-situ observation of the reaction between iron and carbon in TEM was carried out. The contact between iron and carbon was realized utilizing the carbon deposition on the surface of iron and FIB enabled to prepare TEM specimens. The reaction occurred beyond 823K as the precipitation from the boundary between iron and carbon and the precipitates grew into the carbon layer. The concentration of the iron in the precipitates became lower with the increase of distance from the boundary. The growth rate of the precipitates was 100-200nm/min at 873K. The images of the precipitates and the results of EDS indicated the precipitates were transformation of the carbon from amorphous to crystal promoted by the diffusion of the iron atoms.

Palavras-chave

In-situ analysis; TEM; Carbon/ iron interface; Carburization.

In-situ analysis; TEM; Carbon/ iron interface; Carburization.