Effect of Si Content on Thermal Stability of CrAl(Si)N Coatings

Abstract:

The effect of annealing temperatures on surface morphologies, microstructure, and mechanical behaviors of CrAlSiN coatings with different Si content was investigated. EDX, XRD and SEM were employed to reveal the compositions and microstructure of CrAlSiN coatings. For Si content ≤8.6%, grain sizes reduced with temperature increasing to 400°C and then increased with further increase in temperature. For Si content ≥10.7%, grain sizes gradually reduced with annealing temperature increasing. When the annealing temperature arrived at 400°C, the hardness of CrAlSiN coatings with different Si content was much higher than as deposited. While the annealing further increased to 800°C, the hardness of CrAlSiN coatings with Si content ≤8.6% reduced, but the hardness of CrAlSiN coatings with Si content ≥10.7% continued to increase.

• Periodical: Applied Mechanics and Materials (Volumes 799-800)
• Pages: 448-451
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.799-800.448
• Online since: October 2015
• Authors: Zhi Tong Chen, Guang Jian Peng, Yuan Xia, Guang Li*
• Keywords: CrAlSiN, Magnetron Sputtering, Si Content, Thermal Stability

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