Devitrification of arc-sprayed FeBSiNb amorphous coatings: Effects on wear resistance and mechanical behavior

FeBSiNb amorphous coatings were synthesized by arc spray processing. The effects of annealing treatments on the microstructure, elastic and mechanical properties of the coatings were investigated. Annealing below 650°C induces the formation of α-Fe phase nanocrystals. Annealing at 650°C promotes the...

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Bibliographic Details
Published in:Surface & coatings technology 2013-11, Vol.235, p.720-726
Main Authors: Cheng, J.B., Liang, X.B., Xu, B.S.
Format: Article
Language:English
Subjects:
Annealing
Applied sciences
Coatings
Contact of materials. Friction. Wear
Cross-disciplinary physics: materials science
rheology
Elastic constants
Erbium
Exact sciences and technology
Hardness
Materials science
Mechanical properties
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metallic glass
Metals. Metallurgy
Microstructure
Nanoindentation
Physics
Production techniques
Protective coatings
Surface treatment
Surface treatments
Wear resistance
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Summary:FeBSiNb amorphous coatings were synthesized by arc spray processing. The effects of annealing treatments on the microstructure, elastic and mechanical properties of the coatings were investigated. Annealing below 650°C induces the formation of α-Fe phase nanocrystals. Annealing at 650°C promotes the formation of Fe3B, Fe23B6 phases and α-Fe solid solution. The as-sprayed coating displays ultra-high hardness (H>16GPa), high reduced Young's modulus (Er>210GPa) and good wear resistance. These properties are further improved after annealing treatments (H>20GPa and Er>260GPa are achieved in the fully crystallized coating). The mechanical hardening is accompanied with an increase of the ratio of hardness to elastic modulus (H/Er), the yield pressure (H3/Er2) and the elastic recovery (η value). The different microstructural mechanisms responsible for these annealing-induced changes in mechanical and elastic properties are discussed. •The devitrification behaviors of arc-sprayed FeBSiNb coatings were investigated.•Nano-indention was used to characterize of the coatings.•The properties of the coatings were investigated by H/Er, H3/Er2 and η value.•The mechanism for annealing-induced change in mechanical properties was discussed.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2013.08.054