Effects of environment on dry sliding wear behavior of silver–copper based composites containing tungsten disulfide
| Autor: | Ji-si Wu, Jing-fu Li, Lei Zhang, Zhi-yuan Qian |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Delamination Abrasive Tungsten disulfide Metals and Alloys chemistry.chemical_element 02 engineering and technology Tribology 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics Microstructure Nitrogen chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering X-ray photoelectron spectroscopy chemistry Materials Chemistry Lubrication Composite material 0210 nano-technology |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 27:2202-2213 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(17)60246-2 |
| Popis: | Silver based composites containing different amounts of WS2 were prepared by hot-pressing method and their tribological behaviors were investigated against coin silver under humid air, dry nitrogen and vacuum on a ball-on-disk tester with normal load of 5 N. The components of composites, microstructure of debris and worn surface were characterized using XRD SEM, EDS and XPS. It is demonstrated that environmental conditions significantly affect the tribological behavior of silver based composites. The friction coefficient is the highest in humid air, and the lowest in dry nitrogen. It is found that the friction and wear behavior of the composites are strongly depended on the characteristics of the lubrication film forming in different operating environments, such as thickness and composition. In addition, it is indicated that the dominant wear mechanisms of silver based composites are abrasive wear and delamination under different conditions. |
| Databáze: | OpenAIRE |
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