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http://dx.doi.org/10.3740/MRSK.2021.31.3.156

Microstructural Characteristics of Oxidation Resistant Cr-Si-Al alloys in Cast State and after High Temperature Heating  

Kim, Jeong-Min (Department of Advanced Materials Engineering, Hanbat National University)
Kim, Chae-Young (Department of Advanced Materials Engineering, Hanbat National University)
Yang, Won-Chul (Department of Advanced Materials Engineering, Hanbat National University)
Park, Joon-Sik (Department of Advanced Materials Engineering, Hanbat National University)
Publication Information
Korean Journal of Materials Research / v.31, no.3, 2021 , pp. 156-161 More about this Journal
Abstract
Cr-Si based alloys are not only excellent in corrosion resistance at high temperatures, but also have good wear resistance due to the formation of Cr3Si phase, therefore they are promising as metallic coating materials. Aluminum is often added to Cr-Si alloys to improve the oxidation resistance through which stable alumina surface film is formed. On the other hand, due to the addition of aluminum, various Al-containing phases may be formed and may negatively affect the heat resistance of the Cr-Si-Al alloys, so detailed investigation is required. In this study, two Cr-Si-Al alloys (high-Si & high-Al) were prepared in the form of cast ingots through a vacuum arc melting process and the microstructural changes after high temperature heating process were investigated. In the case of the cast high-Si alloy, a considerable amount of Cr3Si phase was formed, and its hardness was significantly higher than that of the cast high-Al alloy. Also, Al-rich phases (with the high Al/Cr ratio) were not found much compared to the high-Al alloy. Meanwhile, it was observed that the amount of the Al-rich phases reduced by the annealing heat treatment for both alloys. In the case of the high temperature heating at 1,400 ℃, no significant microstructural change was observed in the high Si alloy, but a little more coarse and segregated AlCr phases were found in the high Al alloy compared to the cast state.
Keywords
Cr-Si-Al alloy; high temperature; heating; microstructure; hardness;
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1 W. Zhong, P. A. Mouche and B. J. Heuser, J. Nucl. Mater., 498, 137 (2018).   DOI
2 C. Chen, X. Feng and Y. Shen, Mater. Charact., 120, 97 (2016).   DOI
3 M. Fukumoto, Y. Matsumura, S. Hayashi, T. Narita, K. Sakamoto, A. Kasama and R. Tanaka, Mater. Trans., 44, 731 (2003).   DOI
4 C. Chen, J. Zhang, C. Duan, X. Feng and Y. Shen, J. Alloys Compd., 660, 208 (2016).   DOI
5 Y. Dong, F. Ge, F. Meng, G. Zhao, J. Zhou, Z. Deng, Q. Huang and F. Huang, Surf. Coat. Technol., 350, 841 (2018).   DOI
6 J. M. Kim, I. H. Kim and H. G. Kim, Korean J. Mater. Res., 29, 7 (2019).   DOI
7 J. M. Kim and C. Y. Kim, Coatings, 10, 329 (2020).   DOI
8 A. S. Ulrich, P. Pfizenmaier, A. Solimani, U. Glatzel and M. C. Galetz, Int. J. Refract. Metals. Hard Mater., 76, 72 (2018).   DOI
9 J. W. Newkirk and J. A. Hawk, Wear, 251, 1361 (2001).   DOI
10 A. S. Ulrich, P. Pfizenmaier, A. Solimani, U. Glatzel and M. C. Galetz, Corros. Sci., 165, 108376 (2020).   DOI
11 S. Cui and I. H. Jung, J. Alloys Compd., 708, 887 (2017).   DOI
12 S. Cui, I. H. Jung, J. Kim and J. Xin, J. Alloys Compd., 698, 1038 (2017).   DOI
13 Y. Liang, C. Guo, C. Li and Z. Du, J. Phase Equilib. Diffus., 30, 462 (2009).   DOI
14 C. Zhang, P. Lv, H. Xia, Z. Yang, S. Konovalov, X. Chen and Q. Guan, Vacuum, 167, 263 (2019).   DOI
15 Z. Zhou, Z. Li, X. Wang, Y. Liu, Y. Wu, M. Zhao and F. Yin, Thermochim. Acta, 577, 59 (2014).   DOI
16 A. Soleimani-Dorcheh and M. C. Galetz, Oxid. Met., 84, 73 (2015).   DOI
17 A. Gali, H. Bei and E. P. George, Acta Mater., 57, 3823 (2009).   DOI
18 J. H. Hung, Y. L. Chiu, T. Zhu and W. Gao, Asia-Pac. J. Chem. Eng., 2, 493 (2007).   DOI