TY - JOUR
T1 - Effect of annealing on the microstructure, mechanical and electrochemical properties of CrAlC coatings
AU - Liu, Fujia
AU - Cao, Hongshuai
AU - Li, Hao
AU - Yang, Jiao
AU - Zhao, Nie
AU - Qi, Fugang
AU - Ouyang, Xiaoping
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/10/15
Y1 - 2022/10/15
N2 - The CrAlC coating has broad application prospects as a high temperature protective material due to its unique properties. However, it is difficult to control the properties of CrAlC coating due to the multiphase structure produced by thermally induced solid-reaction. In this paper, the CrAlC coating was prepared by filtered cathodic vacuum arc (FCVA) technology. In order to elucidate the relationship between the phase structure evolution and the properties, the structure, mechanical and electrochemical properties of the CrAlC coating before and after annealing were systematically investigated. The results illustrated that the CrAlC coating changed from amorphous structure to crystalline structure after annealing, and the phase composition varied with the increases of annealing temperature. As the annealing temperature increased from 700 °C to 800 °C, the content of Cr23C6 and Al4C3 increased. However, with further increasing the annealing temperature to 900 °C, the content of Al4C3 gradually decreased, and the Cr23C6 phase was transformed into Cr7C3 and Cr3C2 phases. In addition, the hardness and corrosion resistance of the coating first increased and then decreased with the increase of annealing temperature. When the annealing temperature was 800 °C, the CrAlC coating had the highest hardness (18.28 GPa) and the best corrosion resistance with the smallest corrosion current density (8.54 × 10-9 A/cm2).
AB - The CrAlC coating has broad application prospects as a high temperature protective material due to its unique properties. However, it is difficult to control the properties of CrAlC coating due to the multiphase structure produced by thermally induced solid-reaction. In this paper, the CrAlC coating was prepared by filtered cathodic vacuum arc (FCVA) technology. In order to elucidate the relationship between the phase structure evolution and the properties, the structure, mechanical and electrochemical properties of the CrAlC coating before and after annealing were systematically investigated. The results illustrated that the CrAlC coating changed from amorphous structure to crystalline structure after annealing, and the phase composition varied with the increases of annealing temperature. As the annealing temperature increased from 700 °C to 800 °C, the content of Cr23C6 and Al4C3 increased. However, with further increasing the annealing temperature to 900 °C, the content of Al4C3 gradually decreased, and the Cr23C6 phase was transformed into Cr7C3 and Cr3C2 phases. In addition, the hardness and corrosion resistance of the coating first increased and then decreased with the increase of annealing temperature. When the annealing temperature was 800 °C, the CrAlC coating had the highest hardness (18.28 GPa) and the best corrosion resistance with the smallest corrosion current density (8.54 × 10-9 A/cm2).
KW - Annealing
KW - Corrosion resistance
KW - CrAlC coating
KW - Filtered cathodic vacuum arc
KW - Hardness
UR - https://www.scopus.com/pages/publications/85137088039
U2 - 10.1016/j.surfcoat.2022.128800
DO - 10.1016/j.surfcoat.2022.128800
M3 - 文章
AN - SCOPUS:85137088039
SN - 0257-8972
VL - 447
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
M1 - 128800
ER -