Preparation and performance of a cold gas dynamic sprayed high-aluminum bronze coating

Li Feng; Chang Guan; Ji-rong Chang; Hai-min Zhai; Guo-sheng An; Wen-sheng Li

doi:10.1007/s12613-018-1689-1

Volume 25 Issue 11

Nov. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(11): 1354-1361

Li Feng, Chang Guan, Ji-rong Chang, Hai-min Zhai, Guo-sheng An, and Wen-sheng Li, Preparation and performance of a cold gas dynamic sprayed high-aluminum bronze coating, Int. J. Miner. Metall. Mater., 25(2018), No. 11, pp. 1354-1361. https://doi.org/10.1007/s12613-018-1689-1

Cite this article as:

Li Feng, Chang Guan, Ji-rong Chang, Hai-min Zhai, Guo-sheng An, and Wen-sheng Li, Preparation and performance of a cold gas dynamic sprayed high-aluminum bronze coating, Int. J. Miner. Metall. Mater., 25(2018), No. 11, pp. 1354-1361. https://doi.org/10.1007/s12613-018-1689-1

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Research Article

Preparation and performance of a cold gas dynamic sprayed high-aluminum bronze coating

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Corresponding author:
Wen-sheng Li E-mail: Liws@lut.edu.cn
Received: 10 March 2018; Revised: 6 May 2018; Accepted: 11 June 2018

Abstract

Abstract

By mixing preheated high-aluminum bronze powders with different amounts of Al₂O₃ powder, a low-pressure cold-sprayed coating was prepared and sprayed onto a Cr12MoV steel substrate. The hardness of the coating and the bonding strength between the coating and the substrate were tested with a HV-1000 microhardness tester and a mechanical universal testing machine. The surface microstructure, cross-section and tensile fracture surface of the coating were observed with a scanning electron microscope (SEM). Correspondingly, the influences of the preheat treatment temperature of the bronze powder and the Al₂O₃ content on the coating performance were investigated. The results indicate that the hardness of bronze powders decreased and the coating deposition rate increased after the preheating treatment of the bronze powder. The Al₂O₃ content in the mixed powders contributed to the deformation of bronze powders during the spraying process. This trend resulted in varied performance of the coating.
- low-pressure cold spray;
- high-aluminum bronze;
- preheat treatment;
- coating performance

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