Effect of heat treatment on the microstructure and mechanical properties of Fe-based amorphous coatings

Effects of post annealing on the microstructure, mechanical properties and cavitation erosion behavior of arc-sprayed FeNiCrBSiNbW coatings

“…The structure of the coatings was densified as the sintering continued. This phenomenon was similar to the results reported by other researchers [21,28]. These results indicated that oxidation, diffusion and sintering processes occurred during annealing treatment.…”

“…Good wear resistance was obtained from the coating heat-treated below 873 K, and the coatings showed poor wear property when the heat-treatment temperature increased up to 1023 K. Liu et al [20] studied the sliding wear behavior of Fe-based amorphous coating prepared by HVOF spraying process. They found that the highest microhardness was obtained in the coating heat-treated at 973 K and the correlation between the hardness and wear resistance of the coatings existed reasonably when the test was conducted at a relative low load of 2 N. Fu et al [21] demonstrated that proper annealing treatment could reduce the porosity and increase the hardness of the arcsprayed Fe-based amorphous coating significantly, with an exhibition of a better abrasive wear resistance than arc-sprayed 3Cr13 coating. Our earlier studies demonstrated that the corrosion resistance of arc-sprayed FeNiCrBSiNbW coating deteriorated with increasing annealing temperature [22].…”

Wear and high temperature oxidation behaviour of wire arc sprayed iron based coatings

“…The broadening of the peak at the angle of about 45u is observed in the FeCrB(CSi) coatings, which implies that the amorphous phase exist in the coating. 22 It is because the boron element can promote the formation of amorphous phase. The Al 2 O 3 phase is present in the commercial Fe-Cr-Al coating, indicating that the oxidation of aluminium occurred during spraying.…”

“…The relative high microhardness and good wear resistance of the FeCrB(CSi) coatings can be attributed to the amorphous phase, which has quite high hardness. 22 And the distribution of the boride precipitate also improves the hardness and wear resistance of the coatings. Moreover, the high content of chromium element results in the formation of Fe-Cr solid solution, which can provide the solution strengthening for the coatings.…”

Space-state robust control of a Buck converter with amorphous core coil and variable load

“…These variations are produced by material heating or heating-cooling cycles which are similar to undesirable annealing treatments [6][7][8]. Different authors have demonstrated that the coercive field increases with annealing and the passage of time.…”