Microstructure and wear resistance of Mo coating deposited by plasma transferred arc process
| Autor: | Qian Cao, Zhang Guojun, Zhonglian Bai, Ren Shuai, Wang Tao, Zhuanning Liu, Xinke Deng |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Scanning electron microscope Mechanical Engineering Metallurgy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Indentation hardness law.invention Amorphous solid 020303 mechanical engineering & transports 0203 mechanical engineering Coating Optical microscope Mechanics of Materials law Vickers hardness test engineering General Materials Science 0210 nano-technology Eutectic system |
| Zdroj: | Materials Characterization. 131:517-525 |
| ISSN: | 1044-5803 |
| Popis: | To improve the wear resistance of a C45E4 steel substrate, a Mo coating was deposited by plasma transferred arc (PTA) process. The phase and microstructure of the coating were characterized by X-ray diffraction (XRD), optical microscope (OM), scanning electron microscopy equipped with an energy dispersive spectrometer (SEM-EDS) and transmission electron microscopy (TEM), respectively. The hardness and wear resistance were investigated by Vickers hardness and pin-on-disk wear testers. It was found that the metastable Fe 63 Mo 37 , Fe solid solution, Fe 7 Mo 6 , and a certain amount of amorphous phases co-existed in the as-deposited Mo coating. The peritectic coupled growth in Fe-Mo alloys was observed. Based on the undercooling and eutectic growth theory, the possibility of the Fe 63 Mo 37 /α-Fe ss peritectic coupled growth has been discussed. The microhardness was much higher than that of the C45E4 steel substrate. The results showed that the coating exhibited higher wear resistance ascribed to the high hardness phases and low-friction MoO 3 film on the worn surface of the coating under dry sliding wear test against ZrO 2 disc at room temperature. |
| Databáze: | OpenAIRE |
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