Abstract
Two kinds of Fe-based amorphous alloy coatings were fabricated by high velocity oxygen fuel (HVOF) spraying and cold spraying (CS). Microstructure, amorphous content, hardness, and high-temperature (below the glass transition temperature) tribological performance were investigated. Results show that the Fe-based amorphous coatings prepared by CS have a high hardness and a low wear rate at room temperature. At 673 K, the oxide layer grew, broke, and peel off periodically, resulting in a high wear rate. Moreover, the high-temperature wear mechanism was fatigue, adhesive, and oxidative wear. Meanwhile, the different crystallization and oxidation behavior of CS and HVOF coatings resulting in the different wear rates at 673 K.
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