Journal
APPLIED SCIENCES-BASEL
Volume 9, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/app9204422
Keywords
chemical bath deposition; FeS coating; lubrication; tribological property; wear
Categories
Funding
- Natural Science Foundation of China [51575073, 51501158]
- Scientific and Technological Research Program of Chongqing [cstc2017jcyjBX0031]
- Graduate scientific research innovation project of Chongqing [CYS18308]
- Program for Innovation Team Building at Institutions of Higher Education in Chongqing [CXTDG20162017]
- Fundamental Research Funds for the Central Universities of China [XDJK2019B066]
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The FeS solid lubricating coatings were prepared on the AISI 5140 steel by chemical bath deposition (CBD) coating technique at various temperatures from 30 to 90 degrees C. The influence of temperature on microstructure, microcracks, and tribological properties was characterized and studied by X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive spectrometry (EDS). The results show that the coating mainly consists of FexSy (FeS, FeS2, and Fe1-xS), and has a chrysanthemum-shaped (CS) morphology composed of the FeS crystal petals. The CS particles nucleate at about 30 degrees C, rapidly grow and reach a peak thickness at about 50-70 degrees C, and finally disappear and are replaced by disordered thick petals at 90 degrees C. The wear resistance of the steel was improved obviously after introducing of FeS coatings, owing to that the coatings can provide better lubrication and improve the wear resistance.
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