Impact of CrAlN Coatings on Oxidation Behavior of K38G Alloy at 800 and 900°C

Abstract:

CrAlN coatings have been deposited on K38G alloy by Closed Filed Unbalanced Magnetron Sputter Ion Plating (CFUMSIP). The microstructure, surface and section morphology of CrAlN coatings before and after oxidation were analyzed by XRD and SEM. At the same time, the mechanical properties and oxidation resistance of CrAlN coating were also studied. The results indicate that the phases in the isometric crystal CrAlN coatings with a hardness of 3500 HV and a adhension of 20 N was the coexistence of CrN and AlN. Each element of CrAlN coatings still existed at 800 and 900°C, but it demonstrated better high-temperature oxidation resistance because of denser oxide scale at 800°C. Besides, internal oxidation occurred under the two temperatures.

• Periodical: Key Engineering Materials (Volume 591)
• Pages: 168-171
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.591.168
• Online since: November 2013
• Authors: Hao Zhang, Shu Wang Duo, Xiang Min Xu, Fei Fei Luo, Huan Ke, Ting Zhi Liu, Yu Chuan Chang
• Keywords: CFUMSIP, CrAlN Coatings, High-Temperature Oxidation, K38G Alloy

References

[1] A. Kayani, T. L. Buchanan, M. Kopczyk, et al. Oxidation resistance of magnetron-sputtered CrAlN coatings on 430 steel at 800°C, surface and coating technology. 201(2006)4460-4466.

DOI: 10.1016/j.surfcoat.2006.08.049

[2] Y. Makino, K. Nogi. Synthesis of pseudobinary Cr-AI-N films with Bl structure by r. f. -assisted magnetron sputtering method, surface and coating technology. 98(1998)1008-1012.

DOI: 10.1016/s0257-8972(97)00391-5

[3] A. Kimura, M. Kawate, H. Hasegawa, et al. Anisotropic lattice expansion and shrinkage　of hexagonal TiAlN and CrAlN films, surface and coating technology. 167-170(2003)367-370.

DOI: 10.1016/s0257-8972(03)00040-9

[4] A. E. Reiter, V. H. Derflinger, B. Hanselmann, et al. Investigation of the properties of Cr1-xAlxN coatings prepared by cathodic arc evaporation, surface and coating technology. 200 (2005) 2114-2122.

DOI: 10.1016/j.surfcoat.2005.01.043

[5] Y. Setsuhara, T. Suzuki, Y. Makino, et al. Phase variation and properties of ( Ti, Al )N films　prepared by ion beam assisted deposition, surface and coating technology. 97(1997)254-258.

DOI: 10.1016/s0257-8972(97)00160-6

[6] A. Sugishima, H. Kajioka, Y. Makino. Phase transition of pseudobinary Cr-Al-N films deposited by magnetron sputtering method, surface and coating technology. 97(1997)590-594.

DOI: 10.1016/s0257-8972(97)00402-7

[7] K. P. Zheng, P. Liu, W. Li, et al. Impacts of Al content on microstructures and mechanical properties of CrAlN coatings, Chinese Journal of Vacuum Science and Tevhnology. 31(2011)686-690.

[8] J. L. Endrino, G. S. Fox-Rabinovich, A. Reiter, et al. Oxidation tuning in AlCrN coatings, Surface and Coatings Technology. 201(2007)4505-4511.

DOI: 10.1016/j.surfcoat.2006.09.089

[9] T. Ikeda, H. Satoh. Phase formation and characterization of hard coatings in the Ti-Al-N system prepared by the cathodic arc ion plating method, Thin Solid Films. 195(1991)99-110.

DOI: 10.1016/0040-6090(91)90262-v

[10] R. Franz, J. Neidhardt, B. Sartory. High-temperature low-friction properties of vanadium-alloyed AlCrN coatings, Tribology Letters. 23(2006)101-107.

DOI: 10.1007/s11249-006-9064-1

[11] Y. Sun, T. Bell, S. Zheng. Finite element analysis of the critical ratio of coating thickness to indentation depth for coating property measurements by nanoindentation, Thin solid films. 258 (1995) 198-204.

DOI: 10.1016/0040-6090(94)06357-5