Microstructure and tribological properties of sprayed nanostructure Fe-based martensite coating on an aluminum cylinder liner
Industrial Lubrication and Tribology
Article publication date: 8 June 2021
Issue publication date: 3 August 2021
The purpose of this paper is to improve the tribological properties of aluminum cylinder liner. Higher martensite contents were closely related to the higher hardness and excellent wear resistance of Fe-based coatings. Furthermore, the grain size of the Fe-based coating was approximately 40 nm, which provides an excellent fine grain strengthening effect.
To improve the tribological properties of aluminum cylinder liners, a Fe-based martensite coating was prepared by internal plasma spraying technology, whose microstructure and tribological properties were then investigated.
Sprayed Fe-based coating possessed a low contact angle and strong adhesion with lubricating oil. In a simulated engine condition, Fe-based coating exhibited a decreased friction coefficient and increased wear resistance under oil lubrication, which was dominated by a stronger adhesive force with lubricating oil, higher martensite contents on the worn surface, higher hardness and higher H/E value than those of the reference HT 200 and Al-19Si cylinder material.
Nanostructure Fe-based martensite coating was sprayed on an aluminum cylinder liner, which demonstrated remarkable advantages over the reference cylinder material.
The authors acknowledge the financial supports by the Shaanxi Provincial Key Research and Development Program (Grant No. 2021SF-469), National Natural Science Foundation of China (Grant No. 51705415 & 51705391) and Foundation of Key Laboratory of Marine Materials and Related Technologies, CAS (Grant No. 2018K01).
Liu, E., Xue, Y., Bai, Y., Pu, J., Du, S. and Du, H. (2021), "Microstructure and tribological properties of sprayed nanostructure Fe-based martensite coating on an aluminum cylinder liner", Industrial Lubrication and Tribology, Vol. 73 No. 5, pp. 692-699. https://doi.org/10.1108/ILT-06-2020-0196
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