Thermal stability of surface modified Ni-Cr-alloys in molten FLiNaK salt (표면처리된 Ni-Cr계 합금의 FLiNaK 용융염 하에서의 고온 안정성)

Hyun Cho (조현); Kwang-Hyun Bang (방광현); TAE-SUK LEE (이태석); BYEONG WOO LEE (이병우)

doi:10.6111/JKCGCT.2012.22.5.227

Thermal stability of surface modified Ni-Cr-alloys in molten FLiNaK salt

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2012, 22(5), pp.227~232
DOI : 10.6111/JKCGCT.2012.22.5.227
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering

Hyun Cho ¹, Kwang-Hyun Bang ², TAE-SUK LEE ², BYEONG WOO LEE ²

¹부산대학교
²한국해양대학교

Accredited

ABSTRACT

Inconel 617 and Hastelloy X are the most promising candidate materials for the heat exchanger of next generation nuclear reactor. Surface coating and its effects on high temperature properties for the Inconel 617 and Hastelloy X under molten FLiNaK (LiF-NaF-KF) salt environment have been investigated. For TiAlN and Al2O3 overlay coatings, the two different PVD (physical vapor deposition) methods of an arc discharge and a sputtering were applied, respectively. A study for the thermal stability of the surface modified Ni-Cr alloy substrates has been conducted. To evaluate the corrosion mechanism of Ni-Cr alloys in the molten salt, a ruptured Inconel pipe used for the molten salt transportation has been analyzed. The thermal properties of morphological and structural properties each sample were characterized before and after heat-treatment at 600oC in molten FLiNaK salt. The results showed that the TiAlN and Al2O3 overlay coated specimens had the enhanced high temperature stability.

KEYWORDS

Inconel 617, Hastelloy X, FLiNaK salt, Coating, Thermal stability

Journal Copyright Policy

This license enables reusers to distribute, remix, adapt, and build upon the material in any medium or format for noncommercial purposes only, and only so long as attribution is given to the creator.

Citation status

* References for papers published after 2025 are currently being built.

[other] / 2007 / Next generation nuclear plant materials research and development program plan / INL/EXT-06-11701, Rev. 4

[other] D.F. Williams / 2006 / Assessment of candidate molten salt coolants for the NGNP/NHI heat-transfer loop / ORNL/TM-2006/69

[other] D.F. Williams / 2006 / Assessment of candidate molten salt coolants for the advanced high-temperature reactor (AHTR) / ORNL/TM-2006/12

[journal] M. Shindo / 1989 / Evaluation of Al2O3 and TiN coating on Hastelloy XR alloy under aggressive conditions / ISIJ Int 29 : 793~

[journal] K.A. Gruss / 1999 / Adhesion measurement of zirconium nitride and amorphous silicon carbide coatings to nickel and titanium alloys / Surf. Coat. Technol 114 : 156~

[journal] 이병우 / 200808 / Thermal oxidation behavior of ceramic-coated Ni-Cr-base superalloys / SURFACE COATINGS TECHNOLOGY / ELSEVIER SCIENCE SA 202(22-23) : 5625~5628

[journal] 이병우 / 2011 / The effect of TiCrN coating on high temperature stability of Inconel 617 / 한국결정성장학회지 / 한국결정성장학회 21(6) : 235~239

[journal] C.H. Jang / 2008 / Oxidation behavior of an Alloy 617 in very high-temperature air and helium environments / Int. J. Press. Vess. and Piping 85 : 368~

[journal] C. Cabet / 2009 / Corrosion of high temperature metallic materials in VHTR / J. Nucl. Mater 392 : 235~

[journal] 조현 / 2012 / High temperature properties of surface-modified Hastelloy X alloy / 한국결정성장학회지 / 한국결정성장학회 22(4) : 183~189

[journal] L.C. Olson / 2009 / Materials corrosion in molten LiF-NaF-KF salt / J. Fluorine Chem 130 : 67~

[report] P.F. Peterson / 2003 / Comparison of molten salt and high-pressure helium for the NGNP intermediate heat transfer fluid

[confproc] F. Carré / 2007 / Innovative reactor systems and requirements for structural materials / OECD NEA NSC Workshop on Structural Materials for Innovative

[report] J.W. Koger / 1972 / Evaluation of Hastelloy N alloys after nine years exposure to both a molten fluoride salt and air at temperatures from 700 to 560oC

[journal] I. Ozeryanaya / 1985 / Corrosion of metals by molten salts in heat-treatment processes / Met. Sci. Heat Treat 3 : 184~

[journal] 조현 / 2009 / Thermal properties of the surface-modified Inconel 617 / 한국결정성장학회지 / 한국결정성장학회 19(6) : 298~304

[journal] T. Watanabe / 2010 / Corrosion characteristic of AlN, Y2O3, Er2O3 and Al2O3 in Flinak for molten salt blanket system / J. Plasma Fusion Res 9 : 342~

KJCKorea
Journal Central

Journal of the Korean Crystal Growth and Crystal Technology 2025 KCI Impact Factor : 0.14 KCI-WoS Impact Factor : 0.45