High-temperature frictional wear behavior of MCrAlY-based coatings deposited by atmosphere plasma spraying |
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| Authors: | Chong Tao Lei Wang Xiu Song |
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| Affiliation: | 1.Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education),Northeastern University,Shenyang,China;2.Baosteel Group Shanghai Meishan Iron & Steel Co. Ltd.,Nanjing,China |
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| Abstract: | Al2O3–Cr2O3/NiCoCrAlYTa coatings were prepared via atmosphere plasma spraying (APS). The microstructure and phase composition of the coatings were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), laser confocal scanning microscopy (LSCM), and transmission electron microscopy (TEM). The dry frictional wear behavior of the coatings at 500°C in static air was investigated and compared with that of 0Cr25Ni20 steel. The results show that the coatings comprise the slatted layers of oxide phases, unmelted particles, and pores. The hot abrasive resistance of the coatings is enhanced compared to that of 0Cr25Ni20, and their mass loss is approximately one-fifteenth that of 0Cr25Ni20 steel. The main wear failure mechanisms of the coatings are abrasive wear, fatigue wear, and adhesive wear. |
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