공정 개선에 따른 사고저항성 CrAl 코팅 피복관의 내마모성 향상
Improved Coating Process for Enhanced Wear Resistance of CrAl Coated Claddings for Accident Tolerant Fuel
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This paper investigates the enhanced wear performance of a CrAl coated accident tolerant fuel (ATF) cladding. In the wake of the Fukushima accident, extensive research on ATF with respect to improving the oxidation resistance of cladding materials is ongoing. Since coated Zr claddings can be applied without major changes to the criteria for reactor core design, many researchers are studying coatings for claddings. To improve the quality of the CrAl coating layer, optimization of the manufacturing process is imperative. This study employs arc ion plating to obtain improved CrAl coated claddings using CrAl binary alloy targets through an improved coating method. Surface roughness and adhesion are improved, and droplets are reduced. Furthermore, the coated layer has a dense and fine microstructure. In scratch tests, all the tested CrAl coated claddings exhibit a superior resistance compared to the Zr cladding. In a fretting wear test, the wear volume of the CrAl coated claddings is smaller compared to the Zr cladding. Furthermore, the coated cladding manufactured through the improved process exhibits better wear resistance than other CrAl coated claddings. Based on these results, we suggest that fine microstructure is attributed to a mechanically and microstructurally robust CrAl coating layer, which enhances wear resistance.
Abstract
This paper investigates the enhanced wear performance of a CrAl coated accident tolerant fuel (ATF) cladding. In the wake of the Fukushima accident, extensive research on ATF with respect to improving the oxidation resistance of cladding materials is ongoing. Since coated Zr claddings can be applied without major changes to the criteria for reactor core design, many researchers are studying coatings for claddings. To improve the quality of the CrAl coating layer, optimization of the manufacturing process is imperative. This study employs arc ion plating to obtain improved CrAl coated claddings using CrAl binary alloy targets through an improved coating method. Surface roughness and adhesion are improved, and droplets are reduced. Furthermore, the coated layer has a dense and fine microstructure. In scratch tests, all the tested CrAl coated claddings exhibit a superior resistance compared to the Zr cladding. In a fretting wear test, the wear volume of the CrAl coated claddings is smaller compared to the Zr cladding. Furthermore, the coated cladding manufactured through the improved process exhibits better wear resistance than other CrAl coated claddings. Based on these results, we suggest that fine microstructure is attributed to a mechanically and microstructurally robust CrAl coating layer, which enhances wear resistance.
참고문헌 (17)
- Koo, Y. H, "KAERI’s development of LWR accident-tolerant fuel", Nuclear Tech, 186, pp.295~304 (2014)
- 김현길, "Development Status of Accident-tolerant Fuel for Light Water Reactors in Korea", Nuclear Engineering and Technology, 48(1), pp.1~15 (2016), 한국원자력학회
- Kim, H. G., "Out-of-pile performance of surface-modified Zr cladding for accident tolerant fuel in LWRs", J. Nucl. Mater, 510, pp.93~99 (2018)
- Bragg-Sitton, S, "Development of advanced accident-tolerant fuels for commercial LWRs", Nucl. News, 57, pp.83~ (2014)
- Chu, S, "Opportunities and challenges for a sustainable energy future", Nature, 488, pp.294~303 (2012)
- Advanced LWR nuclear fuel cladding system development trade-offstudy, "Barret, K", ~, pp.INL, EXT-12-27090
- Ott, L. J, "Preliminary assessment of accident-tolerant fuels on LWR performance during normal operation and under DB and BDB accident conditions", J. Nucl. Mater, 448, pp.520~553 (2014)
- Kim, H. G, "Development of Cr-Al Coating on Zircaloy-4 for Enhanced AccidentTolerant Fuel", Zirconium in the Nuclear Industry: 19thInternational Symposium, pp.172~188 (2021)
- Fabrication of Cr-alloy Target for ATF Cladding and the Analysis of the Coating formed by Cr-alloy Target, "Park, J. H", ~, pp.KAERI, TR-8405[DOI]
- Manufacturing Method of Cr-Al Binary Alloy Sputtering Target for ATF Cladding Coating, "Kim, H. G", ~, pp.KAERI, TR-7548[DOI]
- Development of Cr-Al Alloy Target ManufacturingHIP process for ATF Cladding Coating, "Kim, H. G", ~, pp.KAERI, TR-8739[DOI]
- Lee, Y. H, "Enhanced wear resistance of CrAl-coated cladding for accident-tolerant fuel", J. Nucl. Mater, 523, pp.223~230 (2019)
- ASTM, "G171 Standard test method for scratch hardness of materials using a diamond stylus", pp.1~7 (2009)
- Lee, Y. H, "Enhanced wear resistance of CrAl-coated cladding for accident-tolerant fuel", J. Nucl. Mater, 523, pp.223~230 (2019)
- Park, J. H, "High temperature steam-oxidation behavior of arc ion plated Cr coatings for accident tolerant fuel claddings", Surf. Coating. Technol, 280, pp.256~259 (2015)
- F. Lomello, "Influence of bias voltage on properties of AlCrN coatings prepared by cathodic arc deposition", Surf. Coating. Technol, 224, pp.77~81 (2013)
- Adachi, K, "Wear map of ceramics", Wear, 203-204, pp.291~301 (1997)