Extremely slow carbon diffusion in carbon-supersaturated surface of ferrite

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F14%3A00432048" target="_blank" >RIV/68081723:_____/14:00432048 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Extremely slow carbon diffusion in carbon-supersaturated surface of ferrite

Original language description

Carbon diffusion was studied in carbon-supersaturated surface layer of commercial ferrite- -martensite Cr-Mo steel P91 and in two model ferrite materials: in pure ?-Fe, and in ferrite Fe-Cr alloy. The carbon surface layer, the thickness of which was about 40 nm, was physical- -vapor-deposited and isothermal diffusion anneals were carried out at selected temperatures between 573 K and 1073 K. The depth profiles of carbon were measured by SIMS. It was found that the carbon diffusion proceeded much more slowly in carbon-supersaturated surfaces than in matrices with equilibrium carbon concentration. The carbon diffusion coefficients obtained, D, were close to literature values reported for C diffusion in carbide phase. Measured values of D in pure ?-Fe, ?-Fe-Cr and P91 steel above 773 K were identical. However, significantly higher values of D were measured in P91 below the temperature of 773 K, which was ascribed to different mobility of substitution elements.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BJ - Thermodynamics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Kovové materiály

ISSN

0023-432X

e-ISSN

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Volume of the periodical

52

Issue of the periodical within the volume

3

Country of publishing house

SK - SLOVAKIA

Number of pages

9

Pages from-to

125-133

UT code for WoS article

000342483800001

EID of the result in the Scopus database

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