Microstructure and wear behavior of Fe-based amorphous HVOF coatings produced from commercial precursors

Koga, Guilherme Yuuki; Schulz, Robert; Savoie, S.; Nascimento, Alexandre Romão Costa; Drolet, Y.; Bolfarini, Claudemiro; Kiminami, Cláudio Shyinti

doi:10.1016/j.surfcoat.2016.10.057

Cited by 103 publications

(22 citation statements)

References 36 publications

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“…In a previous study on corrosion and wear, some different properties of Fe-based amorphous coatings were reported. Amorphous coatings prepared via supersonic plasma spraying technology show higher amorphous content, but the bonding strength is low, and pores and microcracks are present inside the coatings, which seriously affect their application [15][16][17]23]. Preparing amorphous coatings with laser cladding can solve the problems of low bonding strength and high porosity.…”

Section: Introductionmentioning

confidence: 99%

Corrosion and Wear Resistance of Fe-Based Amorphous Coatings

Gan

Liu

et al. 2020

Coatings

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Fe-based amorphous coatings were prepared on the surface of 45 steel substrates via supersonic plasma spraying and laser cladding. The corrosion and wear behavior of the two different coatings were investigated. Compared with supersonic plasma spraying, laser cladding resulted in coatings with a relatively denser structure, lower porosity, less cracks, and a good metallurgical bond with the substrate. Thanks to these properties, coatings produced by laser cladding exhibit a higher ability to resist uniform corrosion and better friction and wear performance than plasma-sprayed coatings.

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Section: Introductionmentioning

confidence: 99%

Corrosion and Wear Resistance of Fe-Based Amorphous Coatings

Gan

Liu

et al. 2020

Coatings

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“…9 This creates a smooth surface where the oxide film can uniformly grow across the metal's exterior, usually indicated by a more noble corrosion potential, E corr . In contrast, thermal spray coatings are known for their high surface roughness, porosity, complex microstructure, and unique composition, 10,11 making it difficult to study the material's corrosion behavior using solely time-dependent macro electrochemical measurements. It has been previously reported that thermal spray coatings do not hold the original corrosion resistance of a bulk SS alloy when comparing PDP measurements using the ASTM standard due to the significantly modified microstructure and composition of the sprayed coatings.…”

Section: Introductionmentioning

confidence: 99%

Using macro and micro electrochemical methods to understand the corrosion behavior of stainless steel thermal spray coatings

et al. 2019

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High-velocity oxygen fuel thermal spray stainless steel coatings are desirable for their excellent erosion resistance. However, the fabrication process can lead to a decrease in corrosion resistance in comparison to the original bulk material. Here we produced stainless steel coatings on stainless steel substrates using varying deposition parameters to investigate the corrosion properties of the resulting composite steels and elucidate the corrosion behavior both on the macro and micro scale. Macro potentiodynamic polarization measurements carried out in corroding environments demonstrated the rate of degradation of the Fe-Cr alloy coating. After short immersion periods, the coatings showed iron-like active corroding behavior and no passivation regions on the anodic branch. Over time, the coating's corrosion behavior began to change to signify similar results to that of pure chromium. Ex-situ electron microscopy and elemental composition revealed a Cr oxide rich layer left on the coating's surface. Micro electrochemical techniques including scanning electrochemical microscopy and scanning micropipette contact method were employed over the coatings and powdered material, respectively, to show that the lack of protective passivity the thermal spray coatings possess is mostly inherited from the atomized powdered stainless steel material.

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“…The hard Fe(B,C) phase can carry part of the normal load during the wear process in order to decrease the wear rate. However, brittleness is the Materials 2020, 13, 51 2 of 13 inherent nature of the Fe(B,C) phase, which easily fractures and peels off from the worn surface, destroying the wear resistance of alloys [10]. The surface modification methods do not change the bulk properties, which restricts their application as bulk materials.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and High-Temperature Wear Performance of FeCr Matrix Self-Lubricating Composites from Room Temperature to 800 °C

et al. 2019

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FeCr matrix high-temperature self-lubricating composites reinforced by Mo, Ag, and CuO were fabricated by the powder metallurgy technique. The tribological behaviors of composites were studied at temperatures up to 800 °C. The CuO content was optimized according to the tribological results. Mo showed an obvious lubricating effect when it converted into MoO3. The bimetallic oxide system formed high-temperature solid lubricants with low shear strength. CuO reacted with MoO3 and formed CuMoO4 and Cu3Mo2O9. The composites showed an increase in the friction coefficient with the increase of CuO. However, the wear rates decreased with the increase of CuO. The critical threshold at which there was a transition of friction coefficients and wear rates from room temperature (RT) to 800 °C was 10 wt.% CuO. The Fe(Cr)-14% Mo-10.5% Ag-10% CuO composite showed the most reasonable high-temperature tribological behaviors. This was ascribed to the synergistic effects of silver, Mo, in situ formed solid lubricants (metal oxides and salt compounds), and the stable oxide film on the worn surfaces. At elevated temperatures, the dominant wear mechanism was oxidation wear.

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Microstructure and wear behavior of Fe-based amorphous HVOF coatings produced from commercial precursors

Cited by 103 publications

References 36 publications

Corrosion and Wear Resistance of Fe-Based Amorphous Coatings

Corrosion and Wear Resistance of Fe-Based Amorphous Coatings

Using macro and micro electrochemical methods to understand the corrosion behavior of stainless steel thermal spray coatings

Microstructure and High-Temperature Wear Performance of FeCr Matrix Self-Lubricating Composites from Room Temperature to 800 °C

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