| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1657840 | Surface and Coatings Technology | 2013 | 5 Pages |
Molybdenum (Mo) based amorphous nanocrystalline coating was deposited on the surface of plain carbon steel substrates by atmospheric plasma spraying (APS). X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the microstructures of Mo-based powder and coating. The surface hardness of substrate and coating were determined using a Vickers hardness tester, and microhardness profile of cross-section was realized by a Vickers microhardness tester. Wear tests were carried out using a pin on plate type tester by changing the load and linear speed. The results indicated that the as-prepared Mo-based coating was mainly composed of Fe0.54Mo0.73, Fe3Mo, Cr9Mo21Ni20, Fe3B and Cr0.46Mo.4Si0.14 phases. The average grain size of Mo-based coating was 22–32 nm. The coating presented a dense layered structure and its thickness was about 250 μm. The surface hardness of Mo-based coating was as high as 9.2 GPa, which was 8 times of substrate. The microhardness along the cross-section gradually decreased from coating to substrate. The wear resistance of Mo-based coating was far better than that of substrate.
► We fabricated molybdenum based amorphous nanocrystalline alloy coating by APS. ► Compared with the substrate, the surface hardness of the coating improved 8 times. ► The bonding region is flawless and interface line is clearly visible. ► The coating exhibited excellent wear resistance that of the plain carbon steel.
