Diffusion Kinetics of Chromium in a Novel Super304H Stainless Steel
Diffusion behavior and diffusion kinetics of chromium (Cr) from the pure chromium coating in the matrix of Super304H and TP304H steels were investigated in a temperature range of 600–900 ℃ by using energy-dispersive spectrum (EDS) quantitative line scanning and Fick’s second law of diffusion. Pure C...
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De Gruyter
2017-02-01
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Online Access: | https://doi.org/10.1515/htmp-2015-0227 |
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doaj-32628087c08a4713ad31d4497aa0e4ca2021-09-06T19:19:55ZengDe GruyterHigh Temperature Materials and Processes0334-64552191-03242017-02-0136217518110.1515/htmp-2015-0227Diffusion Kinetics of Chromium in a Novel Super304H Stainless SteelPing Shao Bo0Xie Fei1Wang Rui Kun2Zheng Zhi Jun3Gao Yan4School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. ChinaSchool of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510641, P. R. ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. ChinaDiffusion behavior and diffusion kinetics of chromium (Cr) from the pure chromium coating in the matrix of Super304H and TP304H steels were investigated in a temperature range of 600–900 ℃ by using energy-dispersive spectrum (EDS) quantitative line scanning and Fick’s second law of diffusion. Pure Cr coating was obtained by electroplating. Experimental results show that the diffusion depth and diffusivity of Cr increase gradually with the increase in temperature. The diffusion activation energy of Cr is found to be lower and the diffusion coefficient of Cr to be higher in the Super304H steel than those in the TP304H steel at the same temperature. Furthermore, the diffusion equation of Cr in the Super304H and TP304H steels is DCr/Super304H=1.08×10−15exp (−6.08×104/RT)${D_{{\rm{Cr/Super304H}}}} \, {\rm{=\, 1}}{\rm{. 08 \times 1}}{{\rm{0}}^{{\rm{- 15}}}}{\rm{exp\ (- 6}}{\rm{. 08 \, \times \, 1}}{{\rm{0}}^{\rm{4}}}{\rm{/RT)}}$ and DCr/TP304H=2.29×10−15exp (−7.44×104/RT)${D_{{\rm{Cr/TP304H}}}}{\rm{= 2}}{\rm{. 29 \times 1}}{{\rm{0}}^{{\rm{- 15}}}}{\rm{exp\ (- 7}}{\rm{. 44 \times 1}}{{\rm{0}}^{\rm{4}}}{\rm{/RT)}}$, respectively.https://doi.org/10.1515/htmp-2015-0227super304h austenitic stainless steelcr diffusion kineticsdiffusion coefficient |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ping Shao Bo Xie Fei Wang Rui Kun Zheng Zhi Jun Gao Yan |
spellingShingle |
Ping Shao Bo Xie Fei Wang Rui Kun Zheng Zhi Jun Gao Yan Diffusion Kinetics of Chromium in a Novel Super304H Stainless Steel High Temperature Materials and Processes super304h austenitic stainless steel cr diffusion kinetics diffusion coefficient |
author_facet |
Ping Shao Bo Xie Fei Wang Rui Kun Zheng Zhi Jun Gao Yan |
author_sort |
Ping Shao Bo |
title |
Diffusion Kinetics of Chromium in a Novel Super304H Stainless Steel |
title_short |
Diffusion Kinetics of Chromium in a Novel Super304H Stainless Steel |
title_full |
Diffusion Kinetics of Chromium in a Novel Super304H Stainless Steel |
title_fullStr |
Diffusion Kinetics of Chromium in a Novel Super304H Stainless Steel |
title_full_unstemmed |
Diffusion Kinetics of Chromium in a Novel Super304H Stainless Steel |
title_sort |
diffusion kinetics of chromium in a novel super304h stainless steel |
publisher |
De Gruyter |
series |
High Temperature Materials and Processes |
issn |
0334-6455 2191-0324 |
publishDate |
2017-02-01 |
description |
Diffusion behavior and diffusion kinetics of chromium (Cr) from the pure chromium coating in the matrix of Super304H and TP304H steels were investigated in a temperature range of 600–900 ℃ by using energy-dispersive spectrum (EDS) quantitative line scanning and Fick’s second law of diffusion. Pure Cr coating was obtained by electroplating. Experimental results show that the diffusion depth and diffusivity of Cr increase gradually with the increase in temperature. The diffusion activation energy of Cr is found to be lower and the diffusion coefficient of Cr to be higher in the Super304H steel than those in the TP304H steel at the same temperature. Furthermore, the diffusion equation of Cr in the Super304H and TP304H steels is DCr/Super304H=1.08×10−15exp (−6.08×104/RT)${D_{{\rm{Cr/Super304H}}}} \, {\rm{=\, 1}}{\rm{. 08 \times 1}}{{\rm{0}}^{{\rm{- 15}}}}{\rm{exp\ (- 6}}{\rm{. 08 \, \times \, 1}}{{\rm{0}}^{\rm{4}}}{\rm{/RT)}}$ and DCr/TP304H=2.29×10−15exp (−7.44×104/RT)${D_{{\rm{Cr/TP304H}}}}{\rm{= 2}}{\rm{. 29 \times 1}}{{\rm{0}}^{{\rm{- 15}}}}{\rm{exp\ (- 7}}{\rm{. 44 \times 1}}{{\rm{0}}^{\rm{4}}}{\rm{/RT)}}$, respectively. |
topic |
super304h austenitic stainless steel cr diffusion kinetics diffusion coefficient |
url |
https://doi.org/10.1515/htmp-2015-0227 |
work_keys_str_mv |
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1717777491545817088 |