고온 코팅용 Cr-Al합금의 미세조직 및 특성에 미치는 Si 첨가의 영향

김정민; 김일현; 김현길; Jeong-Min Kim; Il-Hyun Kim; Hyun-Gil Kim

Korean Journal of Materials Research, Vol.29, No.1, 7-10, January, 2019

DOI10.3740/MRSK.2019.29.1.7 Export Citation

고온 코팅용 Cr-Al합금의 미세조직 및 특성에 미치는 Si 첨가의 영향

Effects of Si Addition on the Microstructure and Properties of Cr-Al alloy for High Temperature Coating

김정민^†, 김일현¹, 김현길¹

한밭대학교
¹한국원자력연구원

Jeong-Min Kim^†, Il-Hyun Kim¹, and Hyun-Gil Kim¹

Department of Materials Science and Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
¹Light Water Reactor Fuel Technology Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea

E-mail:

Cr-Al alloys are attracting attention as oxidation resistant coating materials for high temperature metallic materials due to their excellent high temperature stability. However, the mechanical properties and oxidation resistance of Cr-Al alloys can be further enhanced, and such attempts are made in this study. To improve the properties of Cr-Al alloys, Si is added up to 5 wt%. Casting specimens with different amounts of Si content are prepared by a vacuum arc remelting method and isothermally heated under steam conditions at 1,100oC for 1 hour. The as-cast microstructure of low Si alloys is mainly composed of only a Cr phase, while Al8Cr5 and Cr3Si phases are also observed in the 5% Si alloy. In the high Si alloy, only Cr and Cr3Si phases remain after the isothermal heating at 1,100oC. It is found that Si additions slightly decrease the oxidation resistance of the Cr-Al alloy. However, the microhardness of the Cr-Al alloy is observed to increase with an increasing Si content.

Keywords:Cr-Al alloy;oxidation resistance;microhardness;microstructure

[References]

Zhong W, Mouche PA, Heuser BJ, J. Nucl. Mater., 498, 137 (2018)
Sawarn TK, Banerjee S, Samanta A, Rath BN, Kumar S, J. Nucl. Mater., 467, 820 (2015)
Kim HG, Kim IH, Jung YI, Park DJ, Park JY, J. Nucl. Mater., 465, 531 (2015)
Kuprin AS, Belous VA, Voyevodin VN, Bryk VV, et al., J. Nucl. Mater., 465, 400 (2015)
Kim JM, Lee JC, Kim IH, Kim HG, Korean J. Mater. Res., 27(10), 563 (2017)
Kim JM, Ha TH, Kim IH, Kim HG, Metals, 7, 59 (2017)
Chen C, Zhang J, Duan C, Feng X, Shen Y, J. Alloy. Compd., 660, 208 (2016)
Cui S, Jung IH, J. Alloy. Compd., 708, 887 (2017)
Liang Y, Guo C, Li C, Du Z, JPEDAV, 30, 462 (2009)
Yang R, Wu Q, Li S, Gong S, Procedia Eng., 27, 976 (2012)
Birks N, Meier GH, Pettit FS, Introduction to the high-temperature oxidation of metals, p. 101, Cambridge Univ. Press, Cambridge, UK (2006).
Rosales I, Martinez H, J. Mater. Sci. Chem. Eng., 2, 64 (2014)
Newkirk J, Hawk JA, Wear, 251, 1361 (2001)

[Referenced By]

[1] Zhong W, Mouche PA, Heuser BJ, J. Nucl. Mater., 498, 137 (2018)

[2] Sawarn TK, Banerjee S, Samanta A, Rath BN, Kumar S, J. Nucl. Mater., 467, 820 (2015)

[3] Kim HG, Kim IH, Jung YI, Park DJ, Park JY, J. Nucl. Mater., 465, 531 (2015)

[4] Kuprin AS, Belous VA, Voyevodin VN, Bryk VV, et al., J. Nucl. Mater., 465, 400 (2015)

[5] Kim JM, Lee JC, Kim IH, Kim HG, Korean J. Mater. Res., 27(10), 563 (2017)

[6] Kim JM, Ha TH, Kim IH, Kim HG, Metals, 7, 59 (2017)

[7] Chen C, Zhang J, Duan C, Feng X, Shen Y, J. Alloy. Compd., 660, 208 (2016)

[8] Cui S, Jung IH, J. Alloy. Compd., 708, 887 (2017)

[9] Liang Y, Guo C, Li C, Du Z, JPEDAV, 30, 462 (2009)

[10] Yang R, Wu Q, Li S, Gong S, Procedia Eng., 27, 976 (2012)

[11] Birks N, Meier GH, Pettit FS, Introduction to the high-temperature oxidation of metals, p. 101, Cambridge Univ. Press, Cambridge, UK (2006).

[12] Rosales I, Martinez H, J. Mater. Sci. Chem. Eng., 2, 64 (2014)

[13] Newkirk J, Hawk JA, Wear, 251, 1361 (2001)