Wear behavior of HVOF-sprayed Fe-based amorphous coatings

Zhang, C.; Liu, L.; Chan, Kang Cheung; Chen, Qianjie; Tang, Chak Yin

doi:10.1016/j.intermet.2012.05.004

Cited by 152 publications

(44 citation statements)

References 33 publications

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“…The strength of such micro-welded junctions may be greater than the bond strength between particles and this results in particle pull out. Splat delamination may also occur due to the presence of few oxide-rich intersplats which are brittle and cannot accommodate shear strains causing splat pull out [31]. These mechanisms seemed to occur more frequently on the Fe-Ni-Cr-B-C coating, consistent with the previous observations on its lower interlamellar cohesion (Section 3.2).…”

Section: Dry Sliding Wear Resistancesupporting

confidence: 86%

Microstructural Characteristics and Tribological Behavior of HVOF-Sprayed Novel Fe-Based Alloy Coatings

et al. 2014

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Thermally-sprayed Fe-based coatings have shown their potential for use in wear applications due to their good tribological properties. In addition, these kinds of coatings have other advantages, e.g., cost efficiency and positive environmental aspects. In this study, the microstructural details and tribological performances of Fe-based coatings (Fe-Cr-Ni-B-C and Fe-Cr-Ni-B-Mo-C) manufactured by High Velocity Oxygen Fuel (HVOF) thermal spray process are evaluated. Traditional Ni-based (Ni-Cr-Fe-Si-B-C) and hard-metal (WC-CoCr) coatings were chosen as references. Microstructural investigation (field-emission scanning electron microscope FESEM and X-Ray diffractometry XRD) reveals a high density and low oxide content for HVOF Fe-based coatings. Particle melting and rapid solidification resulted in a metastable austenitic phase with precipitates of mixed carbides and borides of chromium and iron which lead to remarkably high nanohardness. Tribological performances were evaluated by means of the ball on-disk dry sliding wear test, the rubber-wheel dry particle abrasion test, and the cavitation erosion wear test. A higher wear resistance validates Fe-based coatings as a future alternative to the more expensive and less environmentally friendly Ni-based alloys.

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Section: Dry Sliding Wear Resistancesupporting

confidence: 86%

Microstructural Characteristics and Tribological Behavior of HVOF-Sprayed Novel Fe-Based Alloy Coatings

et al. 2014

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“…Notably, Fe-based amorphous coatings have already exhibited higher hardness and better corrosion resistance than electroplated Cr and 304 stainless steel in an NaCl solution, demonstrating their great potential in applications on sail cover plates, ship hulls, decks of aircraft carriers, and other items that contact with sea water [11][12][13]. Fe-based amorphous coatings also possess outstanding wear resistance [14][15][16][17][18][19]. However, the wear behaviors of amorphous alloys are diverse in various test conditions, and the mechanism of abrasive wear of amorphous alloys, particularly coatings, is still inconclusive [18,19].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Wear Behavior of Fe-Based Amorphous Coatings under Nanoscratch Tests

Luo

Jiao

et al. 2017

Metals

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Abstract:The wear behavior of two coatings (Fe 49.7 Cr 18 Mn 1.9 Mo 7.4 W 1.6 B 15.2 C 3.8 Si 2.4 and Fe 40 Cr 23 Mo 14 C 15 B 6 Y 2 ) sprayed by high-velocity air fuel technology was investigated through nanoscratch tests under ramping loads. Compared with the substrate, the Fe-based amorphous coatings exhibit lower penetration depth, higher elastic recovery, and lower wear volume, indicating the excellent wear resistance of the coatings. This behavior is related to the high hardness and high hardness/elastic modulus ratio (H/E) of the Fe-based amorphous coatings. From the scanning electron microscopy images of the scratch grooves, it is found out that ploughing governs the wear behavior of the coatings and substrate. In addition, spalling wear easily occurs in the pore regions of the coatings.

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“…In last decades, researchers have been using different thermal spray techniques such as High Velocity Oxy-Fuel (HVOF), Flame Spray (FS) and Plasma Spray for obtaining amorphous coatings [9][10][11][12][13]. Several authors have reported crystallization and oxidation in amorphous coatings when HVOF, FS and Plasma Spray are used [10,[13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Influence of Cold Gas Spray process conditions on the microstructure of Fe-based amorphous coatings

Henao

Concustell

Cano

et al. 2015

Journal of Alloys and Compounds

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a b s t r a c tFe-based amorphous metallic coatings were prepared by Cold Gas Spray process. Through this study, the effects of the process conditions such as spraying distance, gas pressure and temperature on the microstructure of as-sprayed coatings are evaluated. Microstructural studies show that the coatings can present a densely layered structure with porosity below 0.5% and thickness around 800 lm depending on the process conditions. Precipitation of nanocrystals in as-sprayed coatings is observed and present results show its dependence on the thermal and kinetic energy implicated in the process. In general, when gas temperature and pressure decreased, in the studied range, coatings displayed a dense and amorphous structure.

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Wear behavior of HVOF-sprayed Fe-based amorphous coatings

Cited by 152 publications

References 33 publications

Microstructural Characteristics and Tribological Behavior of HVOF-Sprayed Novel Fe-Based Alloy Coatings

Microstructural Characteristics and Tribological Behavior of HVOF-Sprayed Novel Fe-Based Alloy Coatings

Investigating the Wear Behavior of Fe-Based Amorphous Coatings under Nanoscratch Tests

Influence of Cold Gas Spray process conditions on the microstructure of Fe-based amorphous coatings

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